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1. Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

Author: Z. Talip, A. S. Brown, J. Lerendegui-Marco, S. Amaducci, Alexandru Negret, P. Vaz, F. Käppeler, A. Masi, R. Wynants, Alberto Ventura, D. G. Jenkins, M. Sabaté-Gilarte, E. Mendoza, A. Kimura, G. Vannini, O. Aberle, V. Babiano-Suarez, Stefan Kopecky, A. Manna, A. Pavlik, A. Stamatopoulos, M. Diakaki, M. Mastromarco, C. Domingo-Pardo, V. Variale, Dimitri Rochman, S. Heinitz, M. A. Cortés-Giraldo, Z. Eleme, Emilio Andrea Maugeri, M. Kokkoris, Anton Wallner, D. Macina, B. Fernández-Domíngez, E. Jericha, S. Urlass, Mario Barbagallo, Alfredo Ferrari, Paolo Finocchiaro, Maurizio Busso, G. Alaerts, A. Oprea, J. Heyse, D. M. Castelluccio, R. Mucciola, F. Calviño, D. Schumann, Ariel Tarifeño-Saldivia, S. J. Lonsdale, A. Musumarra, G. Cortes, E. Chiaveri, D. Cano-Ott, I. Ferro-Gonçalves, P. M. Milazzo, Ignacio Porras, Rene Reifarth, Giulia Clai, S. Valenta, A. Gawlik, N. Patronis, P. Schillebeeckx, Javier Praena, S. Lo Meo, Carlos Guerrero, J. Perkowski, P. Torres-Sánchez, F. Bečvář, A. Saxena, Marco Calviani, Alberto Mengoni, I. Ladarescu, A. G. Smith, R. Garg, J. Billowes, J. M. Quesada, E. González-Romero, L. Tassan-Got, F. Gunsing, Francesca Matteucci, I. Duran, M. Dietz, Diego Vescovi, Sergio Cristallo, F. Mingrone, J. Andrzejewski, Cristian Massimi, Philip Woods, V. Bécares, L. Caballero, Claudia Lederer-Woods, R. Dressler, V. Vlachoudis, R. Vlastou, Ralf Nolte, M. Caamaño, Deniz Kurtulgil, L. A. Damone, Damir Bosnar, Y. Kadi, K. Göbel, F. Cerutti, V. Alcayne, T. Wright, V. Furman, Y. Kopatch, N. V. Sosnin, Simone Gilardoni, Annamaria Mazzone, Petar Žugec, J. Ulrich, D. Radeck, E. Berthoumieux, J. L. Tain, Niko Kivel, G. Bellia, F. Ogállar, Y. H. Chen, C. Rubbia, G. Tagliente, D. Ramos Doval, A. Casanovas, L. Cosentino, P. F. Mastinu, M. Krtička, T. Martinez, A. Tsinganis, Luciano Piersanti, Nicola Colonna, E. Dupont, M. Bacak, T. Glodariu, L. Audouin, V. Michalopoulou, ITA, GBR, FRA, DEU, ESP, AUT, BEL, HRV, JPN, GRC, IND, POL, CZE, CHE, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Nuclear i de les Radiacions Ionitzants, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Becares, V., Becvar, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A. S., Busso, M., Caamano, M., Caballero, L., Calviani, M., Calvino, F., Cano-Ott, D., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Clai, G., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Eleme, Z., Fernandez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Glodariu, T., Gobel, K., Gonzalez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kadi, Y., Kappeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Kopecky, S., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Matteucci, F., Maugeri, E., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Mucciola, R., Musumarra, A., Negret, A., Nolte, R., Ogallar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A. G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J. L., Talip, Z., Tarifeno-Saldivia, A. E., Tassan-Got, L., Torres-Sanchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wynants, R., Wright, T. J., Zugec, P., Mazzone A., Cristallo S., Aberle O., Alaerts G., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Babiano-Suarez V., Bacak M., Barbagallo M., Becares V., Becvar F., Bellia G., Berthoumieux E., Billowes J., Bosnar D., Brown A.S., Busso M., Caamano M., Caballero L., Calviani M., Calvino F., Cano-Ott D., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Clai G., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Eleme Z., Fernandez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Glodariu T., Gobel K., Gonzalez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Kadi Y., Kappeler F., Kimura A., Kivel N., Kokkoris M., Kopatch Y., Kopecky S., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lerendegui-Marco J., Lo Meo S., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Matteucci F., Maugeri E., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Mingrone F., Mucciola R., Musumarra A., Negret A., Nolte R., Ogallar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Porras I., Praena J., Quesada J.M., Radeck D., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Smith A.G., Sosnin N., Stamatopoulos A., Tagliente G., Tain J.L., Talip Z., Tarifeno-Saldivia A.E., Tassan-Got L., Torres-Sanchez P., Tsinganis A., Ulrich J., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wynants R., Wright T.J., and Zugec P.
Subjects: Nuclear and High Energy Physics, Gd, Neutron time of flight, Física::Física de partícules [Àrees temàtiques de la UPC], Nuclear physics, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Neutron time of flightn, 01 natural sciences, 7. Clean energy, Neutrons--Capture, Cross section (physics), Nucleosynthesis, ComputingMethodologies_SYMBOLICANDALGEBRAICMANIPULATION, 0103 physical sciences, Neutron cross section, ddc:530, Nuclear Physics - Experiment, Spallation, Neutron, n_TOF, Nuclear Experiment, 010306 general physics, 154Gd, Physics, Scintillation, 154 Gd, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, s process, Atmospheric temperature range, lcsh:QC1-999, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, Neutron time-of-flight, Física nuclear, s-process, lcsh:Physics
Abstract: The isotope used in this research was supplied by the United States Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics., The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at kT = 30 keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models., EUFRAT open access programme of the Joint Research Centre at Geel
Published: 2020

2. First results of the 140Ce(n,γ)141Ce cross-section measurement at n_TOF

Author: n_TOF Collaboration, Amaducci, Simone, Colonna, Nicola, Cosentino, Luigi, Cristallo, Sergio, Finocchiaro, Paolo, Krtička, Milan, Massimi, Cristian, Mastromarco, Mario, Mazzone, Annamaria, Mengoni, Alberto, Valenta, Stanislav, Aberle, Oliver, Alcayne, Victor, Andrzejewski, Józef, Audouin, Laurent, Babiano-Suarez, Victor, Bacak, Michael, Barbagallo, Massimo, Bennett, Samuel, Berthoumieux, Eric, Billowes, Jon, Bosnar, Damir, Brown, Adam, Busso, Maurizio, Caamaño, Manuel, Caballero-Ontanaya, Luis, Calviño, Francisco, Calviani, Marco, Cano-Ott, Daniel, Casanovas, Adria, Cerutti, Francesco, Chiaveri, Enrico, Cortés, Guillem, Cortés-Giraldo, Miguel, Damone, Lucia-Anna, Davies, Paul-John, Diakaki, Maria, Dietz, Mirco, Domingo-Pardo, Cesar, Dressler, Rugard, Ducasse, Quentin, Dupont, Emmeric, Durán, Ignacio, Eleme, Zinovia, Fernández-Domínguez, Beatriz, Ferrari, Alfredo, Furman, Valter, Göbel, Kathrin, Garg, Ruchi, Gawlik, Aleksandra, Gilardoni, Simone, Gonçalves, Isabel, González-Romero, Enrique, Guerrero, Carlos, Gunsing, Frank, Harada, Hideo, Heinitz, Stephan, Heyse, Jan, Jenkins, David, Junghans, Arnd, Käppeler, Franz, Kadi, Yacine, Kimura, Atsushi, Knapova, Ingrid, Kokkoris, Michael, Kopatch, Yuri, Kurtulgil, Deniz, Ladarescu, Ion, Lederer-Woods, Claudia, Leeb, Helmut, Lerendegui-Marco, Jorge, Lonsdale, Sarah-Jane, Macina, Daniela, Manna, Alice, Martínez, Trinitario, Masi, Alessandro, Mastinu, Pierfrancesco, Maugeri, Emilio-Andrea, Mendoza, Emilio, Michalopoulou, Veatriki, Milazzo, Paolo, Mingrone, Federica, Moreno-Soto, Javier, Musumarra, Agatino, Negret, Alexandru, Ogállar, Francisco, Oprea, Andreea, Patronis, Nikolas, Pavlik, Andreas, Perkowski, Jarosław, Piersanti, Luciano, Petrone, Cristina, Pirovano, Elisa, Porras, Ignacio, Praena, Javier, Quesada, José-Manuel, Ramos-Doval, Diego, Rauscher, Thomas, Reifarth, René, Rochman, Dimitri, Rubbia, Carlo, Sabaté-Gilarte, Marta, Saxena, Alok, Schillebeeckx, Peter, Schumann, Dorothea, Sekhar, Adhitya, Smith, Gavin, Sosnin, Nikolay, Sprung, Peter, Stamatopoulos, Athanasios, Tagliente, Giuseppe, Tain, José, Tarifeño-Saldivia, Ariel, Tassan-Got, Laurent, Thomas, Benedikt, Torres-Sánchez, Pablo, Tsinganis, Andrea, Ulrich, Jiri, Urlass, Sebastian, Vannini, Gianni, Variale, Vincenzo, Vaz, Pedro, Ventura, Alberto, Vescovi, Diego, Vlachoudis, Vasilis, Vlastou, Rosa, Wallner, Anton, Woods, PhilipJohn, Wright, Tobias, Žugec, Petar, n_TOF Collaboration, Universidade de Santiago de Compostela. Departamento de Física de Partículas, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, ITA, FRA, DEU, ESP, GRC, Amaducci S., Colonna N., Cosentino L., Cristallo S., Finocchiaro P., Krticka M., Massimi C., Mastromarco M., Mazzone A., Mengoni A., Valenta S., Aberle O., Alcayne V., Andrzejewski J., Audouin L., Babiano-Suarez V., Bacak M., Barbagallo M., Bennett S., Berthoumieux E., Billowes J., Bosnar D., Brown A., Busso M., Caamano M., Caballero-Ontanaya L., Calvino F., Calviani M., Cano-Ott D., Casanovas A., Cerutti F., Chiaveri E., Cortes G., Cortes-Giraldo M., Damone L.-A., Davies P.-J., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Ducasse Q., Dupont E., Duran I., Eleme Z., Fernandez-Dominguez B., Ferrari A., Furman V., Gobel K., Garg R., Gawlik A., Gilardoni S., Goncalves I., Gonzalez-Romero E., Guerrero C., Gunsing F., Harada H., Heinitz S., Heyse J., Jenkins D., Junghans A., Kappeler F., Kadi Y., Kimura A., Knapova I., Kokkoris M., Kopatch Y., Kurtulgil D., Ladarescu I., Lederer-Woods C., Leeb H., Lerendegui-Marco J., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Mastinu P., Maugeri E.-A., Mendoza E., Michalopoulou V., Milazzo P., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogallar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Petrone C., Pirovano E., Porras I., Praena J., Quesada J.-M., Ramos-Doval D., Rauscher T., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tain J., Tarifeno-Saldivia A., Tassan-Got L., Thomas B., Torres-Sanchez P., Tsinganis A., Ulrich J., Urlass S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T., Zugec P., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: cross-section, Cerium oxide, Capture, General Physics and Astronomy, QC793-793.5, 7. Clean energy, 01 natural sciences, Ce, chemistry.chemical_compound, neutron, $^{140}$Ce, n_TOF, 010303 astronomy & astrophysics, Physics, Deuterated benzene, Elementary particle physics, nucleosynthesis, Cerium, cerium, Cosmic electrodynamics, Atomic physics, Nucleosynthesis, neutron capture, Cross-section, chemistry.chemical_element, Neutron, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 0103 physical sciences, Nuclear Physics - Experiment, ddc:530, 010306 general physics, capture, Nucleosynthesi, Ones electromagnètiques, Física [Àrees temàtiques de la UPC], Electromagnetic waves, Nuclear data, 140Ce, TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES, chemistry, 13. Climate action, s-process, MACS, Electrodinàmica còsmica
Abstract: The cerium oxide material for this measurement was provided by T. Katabuchi of the Tokyo Institute of Technology., An accurate measurement of the 140Ce(n,g) energy-dependent cross-section was performed at the n_TOF facility at CERN. This cross-section is of great importance because it represents a bottleneck for the s-process nucleosynthesis and determines to a large extent the cerium abundance in stars. The measurement was motivated by the significant difference between the cerium abundance measured in globular clusters and the value predicted by theoretical stellar models. This discrepancy can be ascribed to an overestimation of the 140Ce capture cross-section due to a lack of accurate nuclear data. For this measurement, we used a sample of cerium oxide enriched in 140Ce to 99.4%. The experimental apparatus consisted of four deuterated benzene liquid scintillator detectors, which allowed us to overcome the difficulties present in the previous measurements, thanks to their very low neutron sensitivity. The accurate analysis of the p-wave resonances and the calculation of their average parameters are fundamental to improve the evaluation of the 140Ce Maxwellian-averaged cross-section.
Published: 2021

3. Review and new concepts for neutron-capture measurements of astrophysical interest

Author: M. Sabaté-Gilarte, A. Kimura, A. Segarr, J. Lerendegui-Marco, M. Krtička, T. Martinez, M. Busso, M. Mastromarco, L. Caballero, J. L. Tain, G. Tagliente, Mario Barbagallo, Z. Eleme, D. Schumann, I. Knapova, S. Bennett, B. Fernandez-Domingez, G. Vannini, P. Vaz, P. Sprung, A. Masi, F. Ogallar, A. Saxena, F. Gunsing, V. Michalopoulou, J. Heyse, A. Stamatopoulos, N. Patronis, A. Casanovas, D. G. Jenkins, Alberto Ventura, E. Jericha, E. Berthoumieux, Javier Praena, B. Thomas, A. Negret, Cristian Massimi, Alberto Mengoni, I. Ferro-Goncalves, P. J. Davies, M. A. Cortés-Giraldo, C. Rubbia, P. M. Milazzo, Paolo Finocchiaro, G. Cortes, D. R. Doval, E. Mendoza, S. Urlass, Alfredo Ferrari, J. Balibrea-Correa, J. Moreno-Soto, D. Rochman, L. Cosentino, N. V. Sosnin, A. Mazzone, M. Kokkoris, E. Maugeri, P. F. Mastinua, A. Oprea, Rene Reifarth, C. Petrone, Claudia Lederer-Woods, V. Variale, Arnd R. Junghans, P. Torres-Sanchez, A. Sekhar, M. Diakaki, U. Jiri, F. Mingrone, S. Amaducci, M. Bacak, J. M. Quesada, L. Tassan-Got, Deniz Kurtulgil, J. Andrzejewski, M. Caamaño, E. Chiaveri, V. Babiano-Suarez, D. Cano-Ott, D. Macina, F. Cerutti, V. Vlachoudis, I. Ladarescu, L. Audouin, Carlos Guerrero, L. Piersanti, A. Pavlik, A. S. Brown, R. Garg, C. Domingo-Pardo, E. González-Romero, I. Porras, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. T. Rodriguez-Gonzalez, O. Aberle, V. Furman, Y. Kopatch, A. Tsinganis, Simone Gilardoni, F. Calviño, E. Pirovano, Nicola Colonna, J. Perkowski, E. Dupont, M. A. Millán-Callado, K. Göbel, S. Cristallo, T. Wright, Diego Vescovi, F. Käppeler, A. Musumarra, R. Vlastou, Damir Bosnar, Y. Kadi, A. Manna, Q. Ducasse, S. Valenta, P. Zugec, Marco Calviani, A. G. Smith, M. Dietz, Philip Woods, Anton Wallner, P. Schillebeeckx, A. Gawlik, L. A. Damone, I. Duran, R. Dressler, V. Alcayne, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Calvino, F., Casanovas, A., Segarr, A., Tarifeno-Saldivia, A. E., Guerrero, C., Millan-Callado, M. A., Quesada, J. M., Rodriguez-Gonzalez, M. T., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Barbagallo, M., Bennett, S., Berthoumieux, E., Bosnar, D., Brown, A. S., Busso, M., Caamano, M., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Diakaki, M., Dietz, M., Dressler, R., Ducasse, Q., Dupont, E., Duran, I., Eleme, Z., Fernandez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Gobel, K., Gonzalez-Romero, E., Gunsing, F., Heyse, J., Jenkins, D. G., Jericha, E., Jiri, U., Junghans, A., Kadi, Y., Kappeler, F., Kimura, A., Knapova, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Lederer-Woods, C., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinua, P. F., Mastromarco, M., Maugeri, E., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Ogallar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Petrone, C., Piersanti, L., Pirovano, E., Porras, I., Praena, J., Doval, D. R., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N., Sprung, P., Stamatopoulos, A., Tagliente, G., Tassan-Got, L., Thomas, B., Torres-Sanchez, P., Tsinganis, A., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., Zugec, P., Domingo-Pardo C., Babiano-Suarez V., Balibrea-Correa J., Caballero L., Ladarescu I., Lerendegui-Marco J., Tain J.L., Calvino F., Casanovas A., Segarr A., Tarifeno-Saldivia A.E., Guerrero C., Millan-Callado M.A., Quesada J.M., Rodriguez-Gonzalez M.T., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Bacak M., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamano M., Calviani M., Cano-Ott D., Cerutti F., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Diakaki M., Dietz M., Dressler R., Ducasse Q., Dupont E., Duran I., Eleme Z., Fernandez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Gobel K., Gonzalez-Romero E., Gunsing F., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Kappeler F., Kimura A., Knapova I., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Lederer-Woods C., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinua P.F., Mastromarco M., Maugeri E., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogallar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Doval D.R., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tassan-Got L., Thomas B., Torres-Sanchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., and Zugec P.
Subjects: History, Physics - Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Measure (physics), FOS: Physical sciences, General Physics and Astronomy, 7. Clean energy, 01 natural sciences, Education, Nuclear physics, Nucleosynthesis, 0103 physical sciences, Neutron, 14. Life underwater, Instrumentation (computer programming), [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, physics.ins-det, 010303 astronomy & astrophysics, Stellar evolution, Physics, neutron capture, detector, TOF, Detector, Instrumentation and Detectors (physics.ins-det), Computer Science Applications, Progressive refinement, Neutron capture, astrophysics, neutron capture, neutron time of flight, n_TOF
Abstract: The idea of slow-neutron capture nucleosynthesis formulated in 1957 triggered a tremendous experimental effort in different laboratories worldwide to measure the relevant nuclear physics input quantities, namely (n, γ) cross sections over the stellar temperature range (from few eV up to several hundred keV) for most of the isotopes involved from Fe up to Bi. A brief historical review focused on total energy detectors will be presented to illustrate how advances in instrumentation have led to the assessment of new aspects of s-process nucleosynthesis and to the progressive refinement of stellar models. A summary will be presented on current efforts to develop new detection concepts, such as the Total-Energy Detector with γ-ray imaging capability (i-TED). The latter is based on the simultaneous combination of Compton imaging with neutron time-of-flight (TOF) techniques, in order to achieve a superior level of sensitivity and selectivity in the measurement of stellar neutron capture rates., European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ERC Consolidator Grant project HYMNS) 681740, Instituto de Salud Carlos III Spanish Government FPA2014-52823-C2-1-P FPA2017-83946-C2-1-P, Consejo Superior de Investigaciones Cientificas (CSIC) PIE-201750I26, Program Severo Ochoa SEV-2014-0398
Published: 2020

4. Imaging neutron capture cross sections: i-TED proof-of-concept and future prospects based on Machine-Learning techniques

Author: Ignacio Porras, D. Macina, F. Ogállar, G. Cortes, G. Tagliente, A. Oprea, N. Patronis, A. K. Saxena, Claudia Lederer-Woods, Deniz Kurtulgil, Arnaud Ferrari, L. Audouin, Carlos Guerrero, S. Heinitz, R. Garg, Alberto Mengoni, I. Ladarescu, Rugard Dressler, C. Petrone, P. Torres-Sánchez, Hideo Harada, T. Rodríguez-González, J. Lerendegui-Marco, M. Sabaté-Gilarte, L. Persanti, J. Balibrea-Correa, A. Casanovas, J. Billowes, A. Tsinganis, V. Babiano-Suarez, S. Amaducci, S. Bennett, N. V. Sosnin, O. Aberle, Nicola Colonna, Luis Caballero, M. A. Millán-Callado, Simone Gilardoni, I. F. Gonçalves, A. Stamatopoulos, V. Variale, A. Kimura, Dimitri Rochman, Arnd R. Junghans, Annamaria Mazzone, L. Cosentino, A. Masi, Petar Žugec, M. Mastromarco, D. Bosnar, D. G. Jenkins, Z. Eleme, E. Dupont, Emilio Andrea Maugeri, D. Cano-Ott, P. Sprung, E. Mendoza, Massimo Barbagallo, Y. Kadi, Anton Wallner, Kathrin Göbel, M. Kokkoris, A. Sekhar, M. Diakaki, Y. Kopatch, I. Duran, A. Manna, A. Gawlik, Thomas Rauscher, Jan Heyse, D. Ramos-Doval, Diego Vescovi, Maurizio Busso, J. Andrzejewski, J. Moreno-Soto, M. Bacak, M. A. Cortés-Giraldo, Rene Reifarth, F. Mingrone, G. Vannini, D. Calvo, Paolo Finocchiaro, V. Vlachoudis, M. Krtička, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Dorothea Schumann, I. Knapova, J. M. Quesada, L. Tassan-Got, Alexandru Negret, S. Valenta, T. Martinez, E. Pirovano, B. Fernández-Domínguez, A. S. Brown, P. Vaz, Sergio Cristallo, Marco Calviani, E. González-Romero, F. Käppeler, A. G. Smith, D. Real, L. A. Damone, M. Caamaño, Alberto Ventura, M. Dietz, V. Alcayne, F. Calviño, H. Leeb, A. Musumarra, Philip Woods, A. Pavlik, E. Chiaveri, J. Perkowski, P. F. Mastinu, P. M. Milazzo, C. Domingo-Pardo, F. Cerutti, J. L. Tain, F. Gunsing, Th. Thomas, Cristian Massimi, S. Urlass, P. J. Davies, R. Vlastou, V. Michalopoulou, J. Ulrich, Peter Schillebeeckx, E. Berthoumieux, C. Rubbia, Q. Ducasse, Javier Praena, V. Furman, T. J. Wright, ITA, GBR, FRA, DEU, ESP, AUS, AUT, BEL, HRV, GRC, IND, POL, CZE, European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Consejo Superior de Investigaciones Científicas (España), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Babiano-Su??rez, V., Lerendegui-Marco, J., Balibrea-Correa, J., Caballero, L., Calvo, D., Ladarescu, I., Real, D., Domingo-Pardo, C., Calvi??o, F., Casanovas, A., Tarife??o-Saldivia, A., Alcayne, V., Guerrero, C., Mill??n-Callado, M. A., Rodr??guez-Gonz??lez, T., Barbagallo, M., Aberle, O., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Bennett, S., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Busso, M., Caama??o, M., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cort??s, G., Cort??s-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Diakaki, M., Dietz, M., Dressler, R., Ducasse, Q., Dupont, E., Dur??n, I., Eleme, Z., Fern??ndez-Dom??nguez, B., Ferrari, A., Finocchiaro, P., Furman, V., G??bel, K., Garg, R., Gawlik, A., Gilardoni, S., Gon??alves, I. F., Gonz??lez-Romero, E., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Junghans, A., K??ppeler, F., Kadi, Y., Kimura, A., Knapova, I., Kokkoris, M., Kopatch, Y., Krti??ka, M., Kurtulgil, D., Lederer-Woods, C., Leeb, H., Lonsdale, S. J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Og??llar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Persanti, L., Petrone, C., Pirovano, E., Porras, I., Praena, J., Quesada, J. M., Ramos-Doval, D., Rauscher, T., Reifarth, R., Rochman, D., Rubbia, C., Sabat??-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Sprung, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tassan-Got, L., Thomas, Th., Torres-S??nchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., and ugec, P.
Subjects: Astrophysics and Astronomy, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics: Instrumentation and Detectors, Astrophysics, Instrumentation and Methods for Astrophysics, Nuclear Experiment, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Astrophysics, 01 natural sciences, 0103 physical sciences, Electronic engineering, Nuclear Physics - Experiment, Sensitivity (control systems), [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Nuclear Experiment (nucl-ex), 010306 general physics, physics.ins-det, Nuclear Experiment, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics::Atmospheric and Oceanic Physics, Physics, Large Hadron Collider, i-TED, neutron capture, n_TOF, machine learning, 010308 nuclear & particles physics, Compton imaging, Detector, Experimental validation, Instrumentation and Detectors (physics.ins-det), Neutron capture, Physics: Instrumentation and Detectors, Proof of concept, Benchmark (computing), Instrumentation and Methods for Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, astro-ph.IM
Abstract: Babiano-Suárez, V., et al., i-TED is an innovative detection system which exploits Compton imaging techniques to achieve a superior signal-to-background ratio in (n, γ) cross-section measurements using time-of-flight technique. This work presents the first experimental validation of the i-TED apparatus for high-resolution time-of-flight experiments and demonstrates for the first time the concept proposed for background rejection. To this aim, the Au(n, γ) and Fe(n, γ) reactions were studied at CERN n_TOF using an i-TED demonstrator based on three position-sensitive detectors. Two CD detectors were also used to benchmark the performance of i-TED. The i-TED prototype built for this study shows a factor of ∼ 3 higher detection sensitivity than state-of-the-art CD detectors in the 10 keV neutron-energy region of astrophysical interest. This paper explores also the perspectives of further enhancement in performance attainable with the final i-TED array consisting of twenty position-sensitive detectors and new analysis methodologies based on Machine-Learning techniques., This work has been carried out in the framework of a project funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (ERC Consolidator Grant project HYMNS, with grant agreement No. 681740). The authors acknowledge support from the Spanish Ministerio de Ciencia e Innovación under grants PID2019-104714GB-C21, FPA2017-83946-C2-1-P, FIS2015-71688-ERC, CSIC for funding PIE-201750I26, and the funding agencies of the participating institutes. We would like to thank the crew at the Electronics Laboratory of IFIC, in particular Manuel Lopez Redondo and Jorge Nácher Arándiga for their excellent and efficient work.
Published: 2021

5. Measurement of the Ge76(n,γ) cross section at the n_TOF facility at CERN

Author: M. A. Cortés-Giraldo, V. Bécares, A. Pavlik, C. Domingo-Pardo, D. Cano-Ott, F. Cerutti, M. Diakaki, M. Sabaté-Gilarte, Y. Kadi, A. Gawlik-Ramięga, G. Vannini, F. Bečvář, M. Caamaño, N. Colonna, C. Weiss, A. Oprea, Rugard Dressler, C. Wolf, E. Mendoza, G. Cortes, I. Knapova, S. Valenta, P. Vaz, A. Tsinganis, Peter Schillebeeckx, E. Leal-Cidoncha, Marco Calviani, Y. H. Chen, A. G. Smith, M. Mirea, Javier Praena, S. Lo Meo, Vasilis Vlachoudis, D. Bosnar, Claudia Lederer-Woods, Philip Woods, V. Khryachkov, L. Cosentino, D. G. Jenkins, P. M. Milazzo, O. Aberle, A. Kimura, F. Calviño, H. Leeb, J. Perkowski, P. V. Sedyshev, M. Bacak, R. Cardella, K. Rajeev, A. Musumarra, J. I. Porras, T. Glodariu, Thomas Rauscher, B. Fernández-Domínguez, F. Käppeler, Roberto Losito, Francesca Matteucci, S. Montesano, D. M. Castelluccio, S. Warren, Tanja Heftrich, Kathrin Göbel, V. Furman, T. J. Wright, G. Tagliente, E. Chiaveri, C. Rubbia, A. Stamatopoulos, A. Tattersall, A. Riego-Perez, P. F. Mastinu, V. Variale, Tatsuya Katabuchi, A. Ventura, Pedro G. Ferreira, Mario Weigand, S. Heinitz, J. Andrzejewski, A. Casanovas, D. Macina, Jan Heyse, Carlos Guerrero, J. L. Tain, P. C. Rout, Petar Žugec, Niko Kivel, F. Gunsing, E. Jericha, Emilio Andrea Maugeri, S. Barros, F. Mingrone, Paolo Finocchiaro, M. Krtička, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Dorothea Schumann, Cristian Massimi, J. Lerendegui-Marco, P. Kavrigin, J. A. Ryan, T. Martinez, Rene Reifarth, L. Audouin, I. F. Gonçalves, M. Kokkoris, E. González-Romero, Stefan Schmidt, Ralf Nolte, A. Goverdovski, J. M. Quesada, L. Tassan-Got, A. Mengoni, E. Griesmayer, U. Battino, R. Vlastou, L. A. Damone, E. Berthoumieux, N. Patronis, A. K. Saxena, Arnaud Ferrari, V. Ketlerov, J. Billowes, I. Duran, A. R. García, M. Brugger, C. Beinrucker, E. Dupont, M. Dietz, M. Mastromarco, Massimo Barbagallo, Anton Wallner, J. Balibrea, and Hideo Harada
Subjects: Croatian, Physics, Czech, 010308 nuclear & particles physics, European research, 0103 physical sciences, language, Library science, 010306 general physics, 01 natural sciences, language.human_language
Abstract: This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG No. 677497. We also acknowledge support of Narodowe Centrum Nauki (NCN) under the grant (UMO-2016/22/M/ST2/00183) and University of Lodz under the grant (9/IDUB/MLOD/2021), MEYS of the Czech Republic, the Charles University project UNCE/SCI/013, and the Croatian Science Foundation under the project IP-2018-01-8570.
Published: 2021

6. $^{80}$Se(n,$\gamma$) cross-section measurement at CERN n_TOF

Author: I. Knapova, P. Vaz, F. Mingrone, E. Jericha, J. Andrzejewski, Luis Caballero, Paolo Finocchiaro, A. Gawlik, F. Ogállar, V. Vlachoudis, G. Tagliente, D. Ramos Doval, G. Vannini, F. Gunsing, Javier Praena, J. L. Tain, Cristian Massimi, F. Calviño, J. Perkowski, Alberto Ventura, M. Sabaté-Gilarte, Z. Eleme, A. Casanovas, Emilio Andrea Maugeri, E. Mendoza, V. Variale, Dimitri Rochman, Arnd R. Junghans, Rene Reifarth, M. Kokkoris, Y. Kopatch, Carlos Guerrero, L. Cosentino, S. Heinitz, A. Tsinganis, J. Lerendegui-Marco, S. Amaducci, R. Garg, J. M. Quesada, L. Tassan-Got, P. J. Davies, A. Kimura, Diego Vescovi, C. Petrone, Luciano Piersanti, Sergio Cristallo, E. González-Romero, Alfredo Ferrari, Nicola Colonna, E. Chiaveri, G. Cortes, M. A. Cortés-Giraldo, D. Cano-Ott, M. Caamaño, O. Aberle, I. Ferro-Gonçalves, P. J. Woods, E. Dupont, J. Balibrea-Correa, D. Macina, S. Valenta, F. Cerutti, A. Sekhar, M. Diakaki, P. M. Milazzo, Pierfrancesco Mastinu, A. S. Brown, A. Pavlik, N. Patronis, C. Domingo-Pardo, M. Bacak, A. Musumarra, M. A. Millán-Callado, Marco Calviani, P. Schillebeeckx, Mario Barbagallo, B. Fernández-Domíngez, A. G. Smith, D. Schumann, Ignacio Porras, C. Rubbia, Simone Gilardoni, S. Urlass, P. Torres-Sánchez, Alberto Mengoni, I. Ladarescu, A. Oprea, J. Heyse, M. Dietz, M. Mastromarco, U. Jiri, Q. Ducasse, A. Saxena, V. Michalopoulou, K. Göbel, Anton Wallner, S. Bennett, A. Masi, A. Stamatopoulos, T. Wright, J. Moreno-Soto, D. G. Jenkins, I. Duran, Maurizio Busso, R. Vlastou, R. Dressler, Damir Bosnar, Y. Kadi, Ariel Tarifeño-Saldivia, S. J. Lonsdale, L. A. Damone, M. Krtička, T. Martinez, E. Berthoumieux, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, P. Sprung, Alexandru Negret, F. Käppeler, E. Pirovano, V. Babiano-Suarez, A. Manna, V. Furman, B. Thomas, V. Alcayne, L. Audouin, Claudia Lederer-Woods, Deniz Kurtulgil, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Research Council (ERC) 681740, Babiano-Suarez V., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Bacak M., Balibrea-Correa J., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamao M., Caballero L., Calviani M., Calvio F., Cano-Ott D., Casanovas A., Cerutti F., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Ducasse Q., Dupont E., Durn I., Eleme Z., Fernndez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Gobel K., Gonzlez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Kappeler F., Kimura A., Knapov I., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lerendegui-Marco J., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Maugeri E., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Milln-Callado M.A., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogllar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Quesada J.M., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeo-Saldivia A.E., Tassan-Got L., Thomas B., Torres-Snchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., Zugec P., Babiano-Suarez, V., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Bennett, S., Berthoumieux, E., Bosnar, D., Brown, A. S., Busso, M., Caamao, M., Caballero, L., Calviani, M., Calvio, F., Cano-Ott, D., Casanovas, A., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Ducasse, Q., Dupont, E., Durn, I., Eleme, Z., Fernndez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Gobel, K., Gonzlez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Jiri, U., Junghans, A., Kadi, Y., Kappeler, F., Kimura, A., Knapov, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Maugeri, E., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Milln-Callado, M. A., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Ogllar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Petrone, C., Piersanti, L., Pirovano, E., Porras, I., Praena, J., Quesada, J. M., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N., Sprung, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeo-Saldivia, A. E., Tassan-Got, L., Thomas, B., Torres-Snchez, P., Tsinganis, A., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., and Zugec, P.
Subjects: Physics, History, Large Hadron Collider, Isotope, General Physics and Astronomy, 80Se, neutron capture, neutron time of flight, n_TOF, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Nuclear physics, s process, neutron physics, Time of flight, Nucleosynthesis, 0103 physical sciences, Neutron cross section, Radiative transfer, Nuclear Physics - Experiment, Slow neutron, 010306 general physics, s-process, 010303 astronomy & astrophysics
Abstract: Radiative neutron capture cross section measurements are of fundamental importance for the study of the slow neutron capture (s-) process of nucleosynthesis. This mechanism is responsible for the formation of most elements heavier than iron in the Universe. Particularly relevant are branching nuclei along the s-process path, which are sensitive to the physical conditions of the stellar environment. One such example is the branching at 79Se (3.27 × 105 y), which shows a thermally dependent β-decay rate. However, an astrophysically consistent interpretation requires also the knowledge of the closest neighbour isotopes involved. In particular, the 80Se(n,γ) cross section directly affects the stellar yield of the “cold” branch leading to the formation of the s-only 82Kr. Experimentally, there exists only one previous measurement on 80Se using the time of flight (TOF) technique. However, the latter suffers from some limitations that are described in this presentation. These drawbacks have been significantly improved in a recent measurement at CERN n TOF. This contribution presents a summary of the latter measurement and the status of the data analysis.
Published: 2019

7. The fission experimental programme at the CERN n_TOF facility: status and perspectives

Author: Alberto Ventura, G. Sibbens, Cristian Massimi, Giuseppe Cosentino, A. Tsinganis, A. Moens, R. Vlastou, Nicola Colonna, E. Berthoumieux, L. Tassan-Got, Sergio Cristallo, Massimo Barbagallo, A. Manna, M. Bacak, M. Mirea, D. Lewis, M. Sabaté-Gilarte, N. Patronis, T. J. Wright, E. Mendoza, N. V. Sosnin, Paolo Finocchiaro, Petar Žugec, S. Amaducci, M. Diakaki, S. Bennett, E. Pirovano, A. Stamatopoulos, A. G. Smith, Jan Heyse, Diego Vescovi, D. Vanleeuw, Diego Tarrio, Ralf Nolte, ITA, GBR, FRA, DEU, ESP, BEL, HRV, GRC, ROU, SWE, CHE, Colonna N., Tsinganis A., Vlastou R., Patronis N., Diakaki M., Amaducci S., Barbagallo M., Bennett S., Berthoumieux E., Bacak M., Cosentino G., Cristallo S., Finocchiaro P., Heyse J., Lewis D., Manna A., Massimi C., Mendoza E., Mirea M., Moens A., Nolte R., Pirovano E., Sabate-Gilarte M., Sibbens G., Smith A.G., Sosnin N., Stamatopoulos A., Tarrio D., Tassan-Got L., Vanleeuw D., Ventura A., Vescovi D., Wright T., Zugec P., CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), n_TOF, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Nuclear reaction, Nuclear and High Energy Physics, fission, time of flight, neutron n_TOF, Fission, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Subatomär fysik, 0103 physical sciences, Subatomic Physics, Nuclear astrophysics, Nuclear fusion, fission, Dalton Nuclear Institute, Neutron, 010306 general physics, Nuclear Experiment, Physics, fission, experimental programme, n_TOF facility, 010308 nuclear & particles physics, experimental programme, Neutron radiation, Fast fission, NATURAL SCIENCES. Physics, n_TOF facility, PRIRODNE ZNANOSTI. Fizika, Nuclear technology, ResearchInstitutes_Networks_Beacons/dalton_nuclear_institute
Abstract: Neutron-induced fission reactions play a crucial role in a variety of fields of fundamental and applied nuclear science. In basic nuclear physics they provide important information on properties of nuclear matter, while in nuclear technology they are at the basis of present and future reactor designs. Finally, there is a renewed interest in fission reactions in nuclear astrophysics due to the multi-messenger observation of neutron star mergers and the important role played by fission recycling in r-process nucleosynthesis. Although studied for several decades, many fundamental questions still remain on fission reactions, while modern applications and the development of more reliable nuclear models require high-accuracy and consistent experimental data on fission cross sections and other fission observables. To address these needs, an extensive fission research programme has been carried out at the n_TOF neutron time-of-flight facility at CERN during the last 18 years, taking advantage of the high energy resolution, high luminosity and wide energy range of the neutron beam, as well as of the detection and data acquisition systems designed for this purpose. While long-lived isotopes are studied on the 185 m long flight-path, the recent construction of a second experimental area at a distance of about 19 m has opened the way to challenging measurements of short-lived actinides. This article provides an overview of the n_TOF experimental programme on neutron-induced fission reactions along with the main characteristics of the facility, the various detection systems and data analysis techniques used. The most important results on several major and minor actinides obtained so far and the future perspectives of fission measurements at n_TOF are presented and discussed.
Published: 2020

8. Neutron capture measurement at the n TOF facility of the 204Tl and 205Tl s-process branching points

Author: Luis Caballero, V. Michalopoulou, S. Urlass, Maurizio Busso, I. Duran, A. Masi, E. Mendoza, D. Macina, Carlos Guerrero, R. Garg, A. S. Brown, A. Musumarra, Claudia Lederer-Woods, D. G. Jenkins, G. Cortes, Peter Schillebeeckx, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Emilio Andrea Maugeri, U Koester, Deniz Kurtulgil, E. Dupont, I. Ferro-Gonçalves, M. Kokkoris, A. Pavlik, C. Domingo-Pardo, Ignacio Porras, L. Cosentino, A. Kimura, B. Fernández-Domíngez, P. M. Milazzo, M. Mastromarco, F. Mingrone, M. A. Cortés-Giraldo, D. Bosnar, Y. Kopatch, P. J. Woods, G. Vannini, S. Bennett, J Balibrea, J. Lerendegui-Marco, J. Andrzejewski, Massimo Barbagallo, S. Amaducci, A. Stamatopoulos, F. Ogállar, N. Patronis, A. K. Saxena, A. Oprea, M. Caamaño, E. Jericha, I. Knapova, Paolo Finocchiaro, Anton Wallner, Z. Eleme, Arnaud Ferrari, G. Tagliente, V. Vlachoudis, D. Ramos Doval, B. Thomas, P. Vaz, Dorothea Schumann, Alberto Mengoni, I. Ladarescu, Alberto Ventura, L. A. Damone, P. J. Davies, O. Aberle, V. Variale, Dimitri Rochman, Arnd R. Junghans, M. A. Millán-Callado, A. Casanovas, V. Alcayne, Rene Reifarth, A. Gawlik, S. Heinitz, C. Petrone, F. Gunsing, Diego Vescovi, J. M. Quesada, L. Tassan-Got, Cristian Massimi, Y. Kadi, E. González-Romero, Sergio Cristallo, S. Valenta, Marco Calviani, A. G. Smith, P. Torres-Sánchez, M. Dietz, M. Sabaté-Gilarte, J. Moreno-Soto, D. Cano-Ott, A. Sekhar, M. Diakaki, M. Krtička, T. Martinez, E. Chiaveri, P. F. Mastinu, Kathrin Göbel, Jan Heyse, L. Audouin, M. Bacak, Rugard Dressler, A. Tsinganis, Luciano Piersanti, Nicola Colonna, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, P. Sprung, E. Pirovano, R. Vlastou, E. Berthoumieux, V. Furman, T. J. Wright, Simone Gilardoni, U. Jiri, F. Cerutti, F. Calviño, J. Perkowski, Javier Praena, Alexandru Negret, F. Käppeler, V. Babiano-Suarez, A. Manna, J. L. Tain, C. Rubbia, Q. Ducasse, Casanovas, A., Tarifeo-Saldivia, A. E., Domingo-Pardo, C., Calvio, F., Maugeri, E., Guerrero, C., Lerendegui-Marco, J., Dressler, R., Heinitz, S., Schumann, D., Tain, J. L., Quesada, J. M., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Balibrea, J., Barbagallo, M., Bennett, S., Berthoumieux, E., Bosnar, D., Brown, A. S., Busso, M., Caamao, M., Caballero, L., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Diakaki, M., Dietz, M., Ducasse, Q., Dupont, E., Durn, I., Eleme, Z., Fernndez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Gobel, K., Gonzlez-Romero, E., Gunsing, F., Heyse, J., Jenkins, D. G., Jericha, E., Jiri, U., Junghans, A., Kadi, Y., Kappeler, F., Kimura, A., Knapov, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Milln-Callado, M. A., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Ogllar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Petrone, C., Piersanti, L., Pirovano, E., Porras, I., Praena, J., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Sekhar, A., Smith, A. G., Sosnin, N., Sprung, P., Stamatopoulos, A., Tagliente, G., Tassan-Got, L., Thomas, B., Torres-Snchez, P., Tsinganis, A., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., Zugec, P., Koester, U., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Laue-Langevin (ILL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), ILL, Casanovas A., Tarifeo-Saldivia A.E., Domingo-Pardo C., Calvio F., Maugeri E., Guerrero C., Lerendegui-Marco J., Dressler R., Heinitz S., Schumann D., Tain J.L., Quesada J.M., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Babiano-Suarez V., Bacak M., Balibrea J., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamao M., Caballero L., Calviani M., Cano-Ott D., Cerutti F., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Diakaki M., Dietz M., Ducasse Q., Dupont E., Durn I., Eleme Z., Fernndez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Gobel K., Gonzlez-Romero E., Gunsing F., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Kappeler F., Kimura A., Knapov I., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Milln-Callado M.A., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogllar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tassan-Got L., Thomas B., Torres-Snchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., Zugec P., and Koester U.
Subjects: History, Electron density, Nuclear Theory, General Physics and Astronomy, Natural abundance, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010502 geochemistry & geophysics, 01 natural sciences, Education, Nuclear physics, Nucleosynthesis, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, ddc:530, Nuclear Physics - Experiment, Nuclear Experiment, 010306 general physics, neutron physics, n_TOF, s process nucleosynthesis, 0105 earth and related environmental sciences, Physics, Isotope, Nuclear data, 204Tl, 205Tl, neutron capture, neutron time of flight, n_TOF, Computer Science Applications, Neutron capture, Isotopes of lead, s-process
Abstract: Neutron capture cross sections are one of the fundamental nuclear data in the study of the s (slow) process of nucleosynthesis. More interestingly, the competition between the capture and the decay rates in some unstable nuclei determines the local isotopic abundance pattern. Since decay rates are often sensible to temperature and electron density, the study of the nuclear properties of these nuclei can provide valuable constraints to the physical magnitudes of the nucleosynthesis stellar environment. Here we report on the capture cross section measurement of two thallium isotopes, 204Tl and 205Tl performed by the time-of-flight technique at the n TOF facility at CERN. At some particular stellar s-process environments, the decay of both nuclei is strongly enhanced, and determines decisively the abundance of two s-only isotopes of lead, 204Pb and 205Pb. The latter, as a long-lived radioactive nucleus, has potential use as a chronometer of the last s-process events that contributed to final solar isotopic abundances.
Published: 2020

9. Measurement of the α ratio and (n,γ) cross section of U235 from 0.2 to 200 eV at n_TOF

Author: M. B. Gomez-Hornillos, J. Andrzejewski, C. Carrapiço, M. A. Cortés-Giraldo, G. Cortes, Tanja Heftrich, A. Riego-Perez, D. Tarrío, V. Bécares, C. Weiss, Roberto Capote, M. Mirea, Srinivasan Ganesan, Kathrin Göbel, A. Mallick, G. Vannini, E. Jericha, Rene Reifarth, F. Mingrone, Rugard Dressler, Jan Heyse, M. Mastromarco, Dorothea Schumann, G. Tagliente, C. Lederer, S. Altstadt, V. Variale, J. A. Ryan, E. Chiaveri, A. Tsinganis, P. F. Mastinu, A. K. Saxena, P. Vaz, Stefan Schmidt, Jeri Kroll, F. Calviño, Massimo Barbagallo, Petar Žugec, L.S. Leong, F. Bečvář, H. Leeb, Anton Wallner, Arnaud Ferrari, Vasilis Vlachoudis, J. Balibrea-Correa, M. S. Robles, E. Mendoza, N. Colonna, Peter Schillebeeckx, J. Billowes, J. Perkowski, R. Sarmento, C. Lampoudis, A. Pavlik, V. Khryachkov, P. M. Milazzo, C. Domingo-Pardo, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, P. E. Koehler, Willy Mondelaers, P. V. Sedyshev, D. G. Jenkins, M. Sabaté-Gilarte, D. Cano-Ott, M. Diakaki, C. Paradela, Roberto Losito, L. Audouin, Christoph Langer, K. Fraval, M. Kokkoris, M. Krtička, A. Manousos, A. Goverdovski, Mario Weigand, T. Martinez, D. Bosnar, J. Marganiec, A. Hernández-Prieto, T. Ware, R. Vlastou, E. Berthoumieux, E. Griesmayer, Carlos Guerrero, G. Giubrone, F. Gunsing, Cristian Massimi, V. Furman, T. J. Wright, Tatsuya Katabuchi, A. Ventura, A. Mengoni, M. P. W. Chin, I. Duran, V. Ketlerov, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, J. L. Tain, D. Karadimos, Ariel Tarifeño-Saldivia, J. Lerendegui-Marco, Niko Kivel, A. R. García, M. Brugger, C. Rubbia, I. F. Gonçalves, Fabio Belloni, Javier Praena, F. Cerutti, M. J. Vermeulen, Y. Kadi, S. Valenta, Marco Calviani, E. González, F. Käppeler, and A. J. M. Plompen
Subjects: Nuclear reaction, Physics, 010308 nuclear & particles physics, Fission, 01 natural sciences, Calorimeter, Nuclear physics, Cross section (physics), Neutron capture, Neutron flux, Nuclear fission, 0103 physical sciences, Neutron, 010306 general physics
Abstract: We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of $^{235}$U between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF$_{2}$ Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the $^{6}$Li(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the $^{235}$U(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of $^{235}$U performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.
Published: 2020

10. Neutron Capture on the s -Process Branching Point Tm171 via Time-of-Flight and Activation

Author: Claudia Lederer-Woods, A Kriesel, L. Piersanti, P. V. Sedyshev, Javier Praena, S. Lo Meo, J. Heyse, G. Vannini, B. Fernández-Domínguez, D. M. Castelluccio, F. Käppeler, D. Macina, Carlos Guerrero, D. Bosnar, M A Millán-Callado, F. Mingrone, J. Andrzejewski, J. Lerendegui-Marco, S. Amaducci, O. Aberle, M. Caamaño, E. Leal-Cidoncha, I. Duran, I. F. Gonçalves, D Berkovits, F. Cerutti, A. Gawlik, A. Goverdovski, G. Tagliente, Thomas Rauscher, V. Bécares, T Rodríguez-González, A Damone, Emilio Andrea Maugeri, G. Cortes, Leonid Weissman, S. Montesano, Michael Paul, K. Rajeev, A. Stamatopoulos, M. Kokkoris, S. Warren, R. Vlastou, E. Jericha, Paolo Finocchiaro, E. Berthoumieux, Francesca Matteucci, T Palchan-Hazan, A. Casanovas, S. Halfon, D. Cano-Ott, M. Diakaki, Ulli Köster, E. González-Romero, P. Kavrigin, D Kijel, V. Variale, Dimitri Rochman, A. Musumarra, Dorothea Schumann, J. A. Ryan, M. Tessler, Ariel Tarifeño-Saldivia, S. J. Lonsdale, A. Manna, P. Vaz, Ralf Nolte, E. Griesmayer, Ignacio Porras, P. J. Woods, L. Cosentino, A. Oprea, Tanja Heftrich, R. Cardella, C. Weiss, T Hirsh, A. R. García, mtext, M. Brugger, A Shor, Alberto Ventura, mrow, E. Dupont, P. C. Rout, Y. Kadi, N. Patronis, A. K. Saxena, V. Khryachkov, P. M. Milazzo, Arnaud Ferrari, C. Beinrucker, A. Pavlik, V. Furman, A. Mengoni, S. Valenta, C. Domingo-Pardo, T. J. Wright, B Kaizer, J. Billowes, Marco Calviani, F. Bečvář, V. Ketlerov, C. Wolf, A. G. Smith, Petar Žugec, E. Mendoza, M. Dietz, Peter Schillebeeckx, H Dafna, S. Heinitz, L. Audouin, Y Eisen, M. Bacak, C. Rubbia, Y Buzaglo, T. Glodariu, Roberto Losito, Rugard Dressler, mtext> Tof, M. Sabaté-Gilarte, A. Tsinganis, Nicola Colonna, M. A. Cortés-Giraldo, Vasilis Vlachoudis, Kathrin Göbel, A. Kimura, D. G. Jenkins, Mario Barbagallo, J. L. Tain, J. Marganiec, Niko Kivel, E. Chiaveri, P. F. Mastinu, M. Krtička, T. Martinez, Y. H. Chen, F. Gunsing, Cristian Massimi, M. Mirea, Rene Reifarth, Stefan Schmidt, F. Calviño, H. Leeb, J. M. Quesada, J. Perkowski, L. Tassan-Got, Sergio Cristallo, Pedro G. Ferreira, Mario Weigand, Tatsuya Katabuchi, A Barak, S. Barros, M. Mastromarco, Anton Wallner, J. Balibrea, and Hideo Harada
Subjects: Physics, General Physics and Astronomy, 7. Clean energy, 01 natural sciences, Neutron temperature, Nuclear physics, Neutron capture, Stellar nucleosynthesis, Nucleosynthesis, 0103 physical sciences, Neutron cross section, Neutron, Nuclide, 010306 general physics, s-process
Abstract: The neutron capture cross sections of several unstable nuclides acting as branching points in the s process are crucial for stellar nucleosynthesis studies. The unstable $^{171}$Tm(t$_{1/2}$=1.92 yr) is part of the branching around mass A∼170 but its neutron capture cross section as a function of the neutron energy is not known to date. In this work, following the production for the first time of more than 5 mg of $^{171}$Tm at the high-flux reactor Institut Laue-Langevin in France, a sample was produced at the Paul Scherrer Institute in Switzerland. Two complementary experiments were carried out at the neutron time-of-flight facility (n_TOF) at CERN in Switzerland and at the SARAF liquid lithium target facility at Soreq Nuclear Research Center in Israel by time of flight and activation, respectively. The result of the time-of-flight experiment consists of the first ever set of resonance parameters and the corresponding average resonance parameters, allowing us to make an estimation of the Maxwellian-averaged cross sections (MACS) by extrapolation. The activation measurement provides a direct and more precise measurement of the MACS at 30 keV: 384(40) mb, with which the estimation from the n_TOF data agree at the limit of 1 standard deviation. This value is 2.6 times lower than the JEFF-3.3 and ENDF/B-VIII evaluations, 25% lower than that of the Bao et al. compilation, and 1.6 times larger than the value recommended in the KADoNiS (v1) database, based on the only previous experiment. Our result affects the nucleosynthesis at the A∼170 branching, namely, the $^{171}$Yb abundance increases in the material lost by asymptotic giant branch stars, providing a better match to the available pre-solar SiC grain measurements compared to the calculations based on the current JEFF-3.3 model-based evaluation.
Published: 2020

11. Data for the s Process from n_TOF

Author: Massimi, C., Aberle, O., Alcayne, V., Andrzejewski, J., Audouin, L., Bécares, V., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Benedikt, Th., Bennett, S., Göbel, Kathrin, Gawlik, A., Gilardoni, S., Gonçalves, I. F., González-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Matteucci, F., Junghans, Arnd R., Käppeler, F., Kadi, Y., Kimura, A., Knapova, I., Kokkoris, M., Kopatch, Y., Krtička, M., Kurtulgil, Deniz, Ladarescu, I., Maugeri, E. A., Lederer-Woods, Claudia, Lonsdale, S. J., Macina, D., Manna, A., Martínez, T., Masi, A., Mastinu, P., Mastromarco, M., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, Federica, Moreno-Soto, J., Musumarra, A., Schillebeeckx, P., Negret, A., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., PIERSANTI, Luciano, Petrone, C., Pirovano, E., Porras, I., Schumann, D., Praena, J., Quesada, J. M., Ramos-Doval, D., Rauscher, Thomas, Reifarth, René, Rochman, D., Sabaté-Gilarte, M., Saxena, A., Sekhar, A., Simone, S., Smith, A. G., Sosnin, N. V., Sprung, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Berthoumieux, E., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Ulrich, J., Urlass, Sebastian, Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Billowes, J., VESCOVI, DIEGO, Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., Žugec, P., n TOF Collaboration, Bosnar, D., Brown, A., Busso, Maurizio, Caamaño, M., Caballero-Ontanaya, L., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chiaveri, E., Clai, G., Colonna, N., Cortés, G., Cortès-Giraldo, M. A., Cosentino, L., CRISTALLO, Sergio, Damone, L. A., Davies, P. J., Dietz, M., Domingo-Pardo, C., Dressler, R., Ducasse, Q., Dupont, E., Durán, I., Eleme, Z., Fernàndez-Dominguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Massimi, C., Aberle, O., Alcayne, V., Andrzejewski, J., Audouin, L., Becares, V., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Benedikt, T., Bennett, S., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Busso, M., Caamano, M., Caballero-Ontanaya, L., Calvino, F., Calviani, M., Cano-Ott, D., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chiaveri, E., Clai, G., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Dietz, M., Domingo-Pardo, C., Dressler, R., Ducasse, Q., Dupont, E., Duran, I., Eleme, Z., Fernandez-Dominguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Gobel, K., Gawlik, A., Gilardoni, S., Goncalves, I. F., Gonzalez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Junghans, A. R., Kappeler, F., Kadi, Y., Kimura, A., Knapova, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lonsdale, S. J., Macina, D., Manna, A., Martinez, T., Masi, A., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Ogallar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Petrone, C., Pirovano, E., Porras, I., Praena, J., Quesada, J. M., Ramos-Doval, D., Rauscher, T., Reifarth, R., Rochman, D., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sekhar, A., Simone, S., Smith, A. G., Sosnin, N. V., Sprung, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., Zugec, P., Formicola, Alba, Junker, Matthias, Gialanella, Lucio, Imbriani, Gianluca, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Massimi C., Aberle O., Alcayne V., Andrzejewski J., Audouin L., Becares V., Babiano-Suarez V., Bacak M., Barbagallo M., Benedikt T., Bennett S., Berthoumieux E., Billowes J., Bosnar D., Brown A., Busso M., Caamano M., Caballero-Ontanaya L., Calvino F., Calviani M., Cano-Ott D., Casanovas A., Castelluccio D.M., Cerutti F., Chiaveri E., Clai G., Colonna N., Cortes G., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Dietz M., Domingo-Pardo C., Dressler R., Ducasse Q., Dupont E., Duran I., Eleme Z., Fernandez-Dominguez B., Ferrari A., Finocchiaro P., Furman V., Gobel K., Gawlik A., Gilardoni S., Goncalves I.F., Gonzalez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Junghans A.R., Kappeler F., Kadi Y., Kimura A., Knapova I., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lonsdale S.J., Macina D., Manna A., Martinez T., Masi A., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogallar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Petrone C., Pirovano E., Porras I., Praena J., Quesada J.M., Ramos-Doval D., Rauscher T., Reifarth R., Rochman D., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Simone S., Smith A.G., Sosnin N.V., Sprung P., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Tsinganis A., Ulrich J., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T., Zugec P., and n_TOF
Subjects: Physics, Large Hadron Collider, Isotope, 010308 nuclear & particles physics, s-process, n_TOF, neutron capture data, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 3. Good health, Nuclear physics, Nucleosynthesis, s process, nucleosynthesis, 0103 physical sciences, Neutron, s-process, 010303 astronomy & astrophysics
Abstract: International audience; A considerable amount of (n, $\gamma $ ) reactions has been studied, so far, at the neutron time-of-flight facility n_TOF at CERN. The experimental program aims at determining and improving cross sections for a number of isotopes relevant to s-process nucleosynthesis. A brief summary of some physical cases related to the s-process nucleosyntheis is presented in this work together with ongoing experiments and challenging future programs.
Published: 2018

12. $^{7}$ Be(n,p)$^{7}$ Li Cross Section Measurement for the Cosmological Lithium Problem at the n $\_$ TOF Facility at CERN

Author: M.J.G. Borge, D. M. Castelluccio, Rene Reifarth, A. Kimura, Stefan Schmidt, Srinivasan Ganesan, D. Macina, Carlos Guerrero, Cortés-Giraldo, G. Bellia, J. M. Quesada, L. Tassan-Got, P. J. Woods, Ignacio Porras, Sergio Cristallo, I. Duran, A. Mengoni, V. Bcares, Alexandru Negret, Juliana Schell, A. Casanovas, K. Rajeev, A. K. Saxena, Tatsuya Katabuchi, A. Ventura, J. Lerendegui-Marco, Maurizio Busso, M. Piscopo, Ariel Tarifeño-Saldivia, S. J. Lonsdale, B. Fernández-Domínguez, S. Rothe, F. Käppeler, Francesca Matteucci, R. Catherall, I. F. Gonçalves, P. Kavrigin, L. Cosentino, D. Bosnar, Ralf Nolte, Javier Praena, S. Lo Meo, M. Brugger, E. Griesmayer, A. Stamatopoulos, L. A. Damone, C. Beinrucker, T. Stora, Claudia Lederer-Woods, E. Leal-Cidoncha, W.I. Furman, E. Chiaveri, A. Gawlik, Thomas Rauscher, P. F. Mastinu, D. Cano-Ott, A.P. Bernardes, Deniz Kurtulgil, P. V. Sedyshev, M. Diakaki, A. S. Brown, J. L. Tain, U. Kohester, J. Balibrea-Correa, E. González-Romero, Niko Kivel, O. Aberle, J. Billowes, N. Colonna, A. Oprea, J. Andrzejewski, A. Pavlik, Y. Kadi, C. Domingo-Pardo, Y. H. Chen, C. Rubbia, Kathrin Göbel, J. Marganiec, B. Marsh, P. M. Milazzo, S. Valenta, Karl Johnston, N. Patronis, G. Tagliente, F. Cerutti, R. Vlastou, Marco Calviani, A. G. Smith, D. Radeck, G. Corts, E. Berthoumieux, P. Vaz, A. Masi, Jan Heyse, D. G. Jenkins, T.D. Goodacre, C. Seiffert, M. Ayranov, Emilio Andrea Maugeri, M. Krtička, Simone Gilardoni, A. Musumarra, J. Ballof, E. Jericha, A. Dorsival, Paolo Finocchiaro, T. Martinez, Dorothea Schumann, M. Kokkoris, C. Weiß, S. Heinitz, J. A. Ryan, Tanja Heftrich, N. V. Sosnin, R. Cardella, A. Riego-Perez, Annamaria Mazzone, Petar Žugec, S. Altstadt, L. Audouin, S. Warren, G. Vannini, F. Bečvář, V. Variale, C. Wolf, E. Mendoza, M. Caamaño, Peter Schillebeeckx, P. C. Rout, A. Kalamara, F. Mingrone, T. J. Wright, E. Dupont, M. Mastromarco, A. J. M. Plompen, A. Garca-Rios, Massimo Barbagallo, M. Dietz, Anton Wallner, Hideo Harada, J.G. Martins Correia, M. Mirea, Rugard Dressler, F. Calviño, H. Leeb, M. Sabaté-Gilarte, A. Tsinganis, Luciano Piersanti, J. Perkowski, F. Gunsing, Vasilis Vlachoudis, Cristian Massimi, A. Ferrari, Pedro G. Ferreira, Mario Weigand, M. Bacak, T. Glodariu, Roberto Losito, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Laue-Langevin (ILL), n_TOF, ILL, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Damone, L. A., Barbagallo, M., Mastromarco, M., Mengoni, A., Colonna, N., Cosentino, L., Maugeri, E. A., Heinitz, S., Schumann, D., Dressler, R., Kappeler, F., Finocchiaro, P., Andrzejewski, J., Perkowski, J., Gawlik, A., Aberle, O., Altstadt, S., Ayranov, M., Audouin, L., Bacak, M., Balibrea-Correa, J., Ballof, J., Bcares, V., Becvar, F., Beinrucker, C., Bellia, G., Bernardes, A. P., Berthoumieux, E., Billowes, J., Borge, M. J. G., Bosnar, D., Brown, A., Brugger, M., Busso, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Catherall, R., Cerutti, F., Chen, Y. H., Chiaveri, E., Corts, G., Cortes-Giraldo, M. A., Cristallo, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dorsival, A., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., Garca-Rios, A., Gilardoni, S., Glodariu, T., Gobel, K., Goncalves, I. F., Gonzalez-Romero, E., Goodacre, T. D., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Johnston, K., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Kimura, A., Kivel, N., Kohester, U., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Marsh, B., Martinez, T., Martins Correia, J. G., Masi, A., Massimi, C., Mastinu, P., Matteucci, F., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Piersanti, L., Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rothe, S., Rout, P., Rubbia, C., Ryan, J., Sabate-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Seiffert, C., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Stora, T., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., Zugec, P., Formicola, Alba, Junker, Matthias, Gialanella, Lucio, Imbriani, Gianluca, Damone L.A., Barbagallo M., Mastromarco M., Mengoni A., Colonna N., Cosentino L., Maugeri E.A., Heinitz S., Schumann D., Dressler R., Kappeler F., Finocchiaro P., Andrzejewski J., Perkowski J., Gawlik A., Aberle O., Altstadt S., Ayranov M., Audouin L., Bacak M., Balibrea-Correa J., Ballof J., Bcares V., Becvar F., Beinrucker C., Bellia G., Bernardes A.P., Berthoumieux E., Billowes J., Borge M.J.G., Bosnar D., Brown A., Brugger M., Busso M., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Catherall R., Cerutti F., Chen Y.H., Chiaveri E., Corts G., Cortes-Giraldo M.A., Cristallo S., Diakaki M., Dietz M., Domingo-Pardo C., Dorsival A., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Ferreira P., Furman W., Ganesan S., Garca-Rios A., Gilardoni S., Glodariu T., Gobel K., Goncalves I.F., Gonzalez-Romero E., Goodacre T.D., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heyse J., Jenkins D.G., Jericha E., Johnston K., Kadi Y., Kalamara A., Katabuchi T., Kavrigin P., Kimura A., Kivel N., Kohester U., Kokkoris M., Krticka M., Kurtulgil D., Leal-Cidoncha E., Lederer-Woods C., Leeb H., Lerendegui-Marco J., Lo Meo S., Lonsdale S.J., Losito R., Macina D., Marganiec J., Marsh B., Martinez T., Martins Correia J.G., Masi A., Massimi C., Mastinu P., Matteucci F., Mazzone A., Mendoza E., Milazzo P.M., Mingrone F., Mirea M., Musumarra A., Negret A., Nolte R., Oprea A., Patronis N., Pavlik A., Piersanti L., Piscopo M., Plompen A., Porras I., Praena J., Quesada J.M., Radeck D., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rothe S., Rout P., Rubbia C., Ryan J., Sabate-Gilarte M., Saxena A., Schell J., Schillebeeckx P., Schmidt S., Sedyshev P., Seiffert C., Smith A.G., Sosnin N.V., Stamatopoulos A., Stora T., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Zugec P.
Subjects: Physics, Large Hadron Collider, 010308 nuclear & particles physics, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, BBN, neutron, Nuclear physics, Stars, Cross section (physics), chemistry, Big Bang nucleosynthesis, 7Be(n, p)7Li, Cosmological Lithium Problem, n_TOF, 0103 physical sciences, Nuclear astrophysics, Lithium, Halo, 010306 general physics, Beam (structure)
Abstract: International audience; One of the most puzzling problems in Nuclear Astrophysics is the “Cosmological Lithium Problem”, i.e the discrepancy between the primordial abundance of$^{7}$ Li observed in metal poor halo stars (Asplund et al. in Astrophys J 644:229–259, 2006, [1]), and the one predicted by Big Bang Nucleosynthesis (BBN). One of the reactions that could have an impact on the problem is$^{7}$ Be(n,p)$^{7}$ Li. Despite of the importance of this reaction in BBN, the cross-section has never been directly measured at the energies of interest for BBN. Taking advantage of the innovative features of the second experimental area at the n $\_$ TOF facility at CERN (Sabate-Gilarte et al. in Eur Phys J A 53:210, 2017, [2], Weiss et al. in NIMA 799:90, 2015, [3]), an accurate measurement of$^{7}$ Be(n,p) cross section has been recently performed at n $\_$ TOF, with a pure$^{7}$ Be target produced by implantation of a$^{7}$ Be beam at ISOLDE. The mesurement started in April 2016 and lasted for two months. The experimental procedure, the setup used in the measurement and the results obtained so far will be here presented.
Published: 2018

13. Measurement of 73Ge(n,g) cross sections and implications for stellar nucleosynthesis

Author: S. Montesano, V. Khryachkov, A. Tsinganis, Alfredo Ferrari, F. R. Palomo-Pinto, Nicola Colonna, E. Dupont, A. Goverdovski, G. Tagliente, J. Heyse, A. Musumarra, Claudia Lederer-Woods, M. Mastromarco, F. Gunsing, Cristian Massimi, Pedro G. Ferreira, Mario Weigand, I. Duran, E. Mendoza, Anton Wallner, M. Bacak, P. V. Sedyshev, M. Mirea, J. Balibrea, V. Furman, F. Calviño, H. Leeb, Ioana Gheorghe, J. Perkowski, Tanja Heftrich, S. Heinitz, J. Billowes, M. Sabaté-Gilarte, A. Kimura, Francesca Matteucci, A. Riego-Perez, T. Glodariu, M. Krtička, A. Hernández-Prieto, S. Warren, V. Bécares, L. Cosentino, N. Patronis, R. Dressler, Roberto Losito, M. S. Robles, T. Martinez, E. Jericha, C. Weiss, D. Macina, R. Vlastou, V. Variale, Paolo Finocchiaro, A. Stamatopoulos, P. M. Milazzo, O. Aberle, J. A. Ryan, D. G. Jenkins, E. Berthoumieux, Mario Barbagallo, M. Diakaki, Alberto Mengoni, J. Marganiec, Carlos Guerrero, F. Bečvář, A. Saxena, S. V. Suryanarayana, D. Schumann, Damir Bosnar, Y. Kadi, E. González-Romero, P. F. Mastinu, A. Tattersall, P. Schillebeeckx, Hideo Harada, M. A. Cortés-Giraldo, P. Kavrigin, F. Mingrone, S. Valenta, J. Andrzejewski, Ralf Nolte, Marco Calviani, V. Vlachoudis, M. Kokkoris, Rene Reifarth, E. Griesmayer, A. G. Smith, Petar Žugec, C. Paradela, M. Dietz, Stefan Schmidt, L. A. Damone, L. Audouin, J. M. Quesada, L. Tassan-Got, K. Göbel, B. Fernández-Domínguez, F. Käppeler, T. Wright, Tatsuya Katabuchi, S. Barros, U. Battino, A. Pavlik, C. Domingo-Pardo, E. Chiaveri, D. Cano-Ott, J. I. Porras, I. Knapova, P. Vaz, Alberto Ventura, C. Rubbia, J. L. Tain, Niko Kivel, G. Cortes, J. Lerendegui-Marco, A. R. García, M. Brugger, I. F. Gonçalves, R. J. W. Frost, C. Beinrucker, E. Leal-Cidoncha, Javier Praena, S. Lo Meo, Fabio Belloni, G. Vannini, A. Gawlik, Thomas Rauscher, Ariel Tarifeño-Saldivia, M. Licata, K. Deo, M. Caamaño, V. Ketlerov, F. Cerutti, Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, J., Audouin, L., Becares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becvar, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Finocchiaro, P., Frost, R. J. W., Furman, V., Gobel, K., Garcia, A. R., Gheorghe, I., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krticka, M., Leal-Cidoncha, E., Leeb, H., Licata, M., Lo Meo, S., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., Zugec, P., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), n_TOF, Ministerio de Economía y Competitividad (España), Bécares, V., Bečvář, F., Caamaño, M., Calviño, F., Cortés, G., Cortés-Giraldo, M.A., Damone, L.A., Durán, I., Fernández-Domínguez, B., Frost, R.J.W., Göbel, K., García, A.R., Gonçalves, I.F., González-Romero, E., Hernández-Prieto, A., Jenkins, D.G., Käppeler, F., Krtička, M., Martínez, T., Milazzo, P.M., Palomo-Pinto, F.R., Porras, J.I., Quesada, J.M., Ryan, J.A., Sabaté-Gilarte, M., Smith, A.G., Suryanarayana, S.V., Tain, J.L., Tarifeño-Saldivia, A., Žugec, P., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Nucleosynthesis, Neutron capture, s process, Germanium, n_TOF, s proce, Nuclear reaction, Natural abundance, nucl-ex, 01 natural sciences, 7. Clean energy, Stellar nucleosynthesis, CERN, Astrophysics::Solar and Stellar Astrophysics, n_TOF, Nuclear Experiment (nucl-ex), Nuclear Experiment, Physics, Cross section, Germanium, lcsh:QC1-999, PRIRODNE ZNANOSTI. Fizika, Neutron capture, Nucleosynthesis, s process, Nucleosíntesi, Nuclear and High Energy Physics, nTOF, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Neutron, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Neutrons--Capture, Nuclear physics, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics, Nucleosynthesi, Energies::Energia nuclear [Àrees temàtiques de la UPC], Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Capture cross section, NATURAL SCIENCES. Physics, Stars, 13. Climate action, s-process, lcsh:Physics
Abstract: 73Ge(n, γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300keV, providing for the first time experimental data above 8keV. Results indicate that the stellar cross section at kT=30keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system., This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG Nr.677497.
Published: 2019
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14. Measurement of the 244Cm and 246Cm neutron-induced capture cross sections at the n_TOF facility

Author: A. Oprea, J. Heyse, F. Gunsing, E. Chiaveri, G. Vannini, D. Cano-Ott, Paolo Finocchiaro, M. Bacak, F. Ogállar, V. Bécares, A. Kimura, Y. H. Chen, A. Musumarra, Cristian Massimi, G. Tagliente, J. Ulrich, L. Audouin, V. Michalopoulou, J. Lerendegui-Marco, I. Duran, A. Masi, Francesca Matteucci, A. Gawlik, Mario Barbagallo, G. Cortes, T. Glodariu, Thomas Rauscher, D. G. Jenkins, I. Knapova, D. Schumann, Alfredo Ferrari, D. Radeck, F. Becčvář, I. F. Gonçalves, P. Vaz, F. Mingrone, J. Andrzejewski, R. Dressler, Ralf Nolte, E. Mendoza, Simone Gilardoni, Carlos Guerrero, A. Casanovas, E. Berthoumieux, Alberto Ventura, V. Vlachoudis, L. A. Damone, E. González-Romero, F. Calviño, S. Heinitz, A. S. Brown, A. Tsinganis, M. Diakaki, O. Aberle, L. Cosentino, Nicola Colonna, M. Krtička, J. Perkowski, E. Dupont, G. Bellia, A. Pavlik, P. Schillebeeckx, Maurizio Busso, C. Domingo-Pardo, Diego Vescovi, T. Martinez, V. Variale, A. Saxena, A. Stamatopoulos, Dimitri Rochman, V. Alcayne, Z. Eleme, Hideo Harada, Ariel Tarifeño-Saldivia, S. J. Lonsdale, D. Macina, Javier Praena, S. Lo Meo, L. Persanti, Y. Kopatch, Ignacio Porras, A. Manna, Rene Reifarth, S. Urlass, P. M. Milazzo, M. Mastromarco, P. F. Mastinu, L. Caballero-Ontanaya, Alexandru Negret, Claudia Lederer-Woods, J. L. Tain, T. Talip, J. M. Quesada, N. Patronis, L. Tassan-Got, B. Fernández-Domínguez, Anton Wallner, F. Käppeler, M. Caamaño, Sergio Cristallo, Deniz Kurtulgil, Niko Kivel, F. Cerutti, V. Furman, M. Sabaté-Gilarte, Alberto Mengoni, I. Ladarescu, N. V. Sosnin, Tatsuya Katabuchi, Annamaria Mazzone, Petar Žugec, J. Billowes, D. Ramos-Doval, Emilio Andrea Maugeri, M. Kokkoris, M. A. Cortés-Giraldo, R. Vlastou, Damir Bosnar, Y. Kadi, S. Simone, K. Göbel, T. Wright, S. Valenta, Marco Calviani, A. G. Smith, M. Dietz, Philip Woods, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Nuclear i de les Radiacions Ionitzants, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Alcayne, V., Kimura, A., Mendoza, E., Cano-Ott, D., Martínez, T., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Barbagallo, M., Becčvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Busso, M., Caamaño, M., Caballero-Ontanaya, L., Calviño, F., Calviani, M., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fernández-Domínguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Göbel, K., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González-Romero, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Käppeler, F., Kadi, Y., Katabuchi, T., Kivel, N., Knapova, I., Kokkoris, M., Kopatch, Y., Krtička, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Macina, D., Manna, A., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mazzone, A., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Persanti, L., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Ramos-Doval, D., Rauscher, T., Reifarth, R., Rochman, D., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Simone, S., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Tagliente, G., Tain, J. L., Talip, T., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T., and Žugec, P.
Subjects: Nuclear reaction, Neutron emission, QC1-999, Nuclear physics, 01 natural sciences, 7. Clean energy, law.invention, law, 0103 physical sciences, CERN, Neutron, n_TOF, 010306 general physics, [PHYS]Physics [physics], Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Isotope, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, r-process, Actinide, Nuclear reactor, Neutron capture, n_TOF, 244Cm, 246Cm, neutron capture, 13. Climate action, neutron capture, n_TOF, r-process, Física nuclear, Other, n_TOF, neutron reaction, Cm, neutron capture
Abstract: The neutron capture reactions of the 244Cm and 246Cm isotopes open the path for the formation of heavier Cm isotopes and heavier elements such asThe neutron capture reactions of the 244Cm and 246Cm isotopes open the path for the formation of heavier Cm isotopes and heavier elements such as Bk and Cf in a nuclear reactor. In addition, both isotopes belong to the minor actinides with a large contribution to the decay heat and to the neutron emission in irradiated fuels. There are only two previous 244Cm and 246Cm capture cross section measurements: one in 1969 using a nuclear explosion and the most recent data measured at J-PARC in 2010. The data for both isotopes are very scarce due to the difficulties in performing the measurements: high intrinsic activity of the samples and limited facilities capable of providing isotopically enriched samples. We have measured both neutron capture cross sections at the n_TOF Experimental Area 2 (EAR-2) with three C6D6 detectors and also at Area 1 (EAR-1) with the TAC. Preliminary results assessing the quality and limitations (background subtraction, measurement technique and counting statistics) of this new experimental datasets are presented and discussed. Bk and Cf in a nuclear reactor. In addition, both isotopes belong to the minor actinides with a large contribution to the decay heat and to the neutron emission in irradiated fuels. There are only two previous 244Cm and 246Cm capture cross section measurements: one in 1969 using a nuclear explosion and the most recent data measured at J-PARC in 2010. The data for both isotopes are very scarce due to the difficulties in performing the measurements: high intrinsic activity of the samples and limited facilities capable of providing isotopically enriched samples. We have measured both neutron capture cross sections at the n_TOF Experimental Area 2 (EAR-2) with three C6D6 detectors and also at Area 1 (EAR-1) with the TAC. Preliminary results assessing the quality and limitations (background subtraction, measurement technique and counting statistics) of this new experimental datasets are presented and discussed.
Published: 2019

15. Study of the neutron-induced fission cross section of Np-237 at CERN's n_TOF facility over a wide energy range

Author: E. Leal-Cidoncha, Simone Gilardoni, S. Valenta, E. Dupont, A. Gawlik, Marco Calviani, Thomas Rauscher, R. Cardella, A. Pavlik, Rene Reifarth, A. Musumarra, A. G. Smith, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, G. Vannini, C. Domingo-Pardo, J. M. Quesada, A. Oprea, M. Sabaté-Gilarte, E. González-Romero, M. Caamaño, L. Tassan-Got, Y. H. Chen, J. Lerendegui-Marco, A. Kimura, Javier Praena, S. Lo Meo, Z. Eleme, Y. Kadi, R. Vlastou, D. Radeck, E. Berthoumieux, V. Furman, T. J. Wright, L. Cosentino, A. R. García, G. Cortes, I. F. Gonçalves, J. Andrzejewski, I. Knapova, M. A. Cortés-Giraldo, P. J. Woods, J. Marganiec, P. Vaz, Alberto Ventura, E. Chiaveri, Mario Barbagallo, P. F. Mastinu, A. Mengoni, Pedro G. Ferreira, F. Cerutti, C. Weiss, A. Kalamara, A. S. Brown, N. Patronis, A. K. Saxena, A. Manna, Hideo Harada, M. Mastromarco, D. Bosnar, Rugard Dressler, Arnaud Ferrari, D. Cano-Ott, Anton Wallner, M. Krtička, B. Femandez-Domínguez, M. Diakaki, J. Balibrea, F. Bečvář, Diego Vescovi, F. Gunsing, T. Martinez, A. Masi, P. M. Milazzo, Alexandru Negret, Ariel Tarifeño-Saldivia, S. J. Lonsdale, E. Mendoza, F. Mingrone, A. Tsinganis, C. Lederer, D. G. Jenkins, J. Billowes, F. Käppeler, G. Tagliente, Cristian Massimi, Ignacio Porras, A. Stamatopoulos, Peter Schillebeeckx, Nicola Colonna, O. Aberle, E. Jericha, Vasilis Vlachoudis, Paolo Finocchiaro, A. Casanovas, Dorothea Schumann, J. A. Ryan, S. Warren, C. Rubbia, Emilio Andrea Maugeri, V. Variale, F. Calviño, H. Leeb, M. Kokkoris, J. Perkowski, M. Bacak, L. Audouin, S. Heinitz, P. Kavrigin, Ralf Nolte, E. Griesmayer, T. Glodariu, L. A. Damone, Kathrin Göbel, Jan Heyse, J. L. Tain, Niko Kivel, Durán, Deniz Kurtulgil, P. V. Sedyshev, D. Macina, Carlos Guerrero, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear fuel cycle, Large Hadron Collider, Isotope, 010308 nuclear & particles physics, Fission, QC1-999, Nuclear Theory, MicroMegas detector, n_TOF, 237Np, fission, neutron time of flight, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Neutron temperature, 030218 nuclear medicine & medical imaging, Nuclear physics, 03 medical and health sciences, Cross section (physics), 0302 clinical medicine, 0103 physical sciences, Physics::Accelerator Physics, Neutron, Nuclear Physics - Experiment, Nuclear Experiment
Abstract: This research is implemented through IKY scholarships programme and co-financed by the European Union (European Social Fund - ESF) and Greek national funds through the action entitled Reinforcement of Postdoctoral Researchers, in the framework of the Operational Programme Human Resources Development Program, Education and Lifelong Learning of the National Strategic Reference Framework (NSRF) 2014-2020., Neutron-induced fission cross sections of isotopes involved in the nuclear fuel cycle are vital for the design and safe operation of advanced nuclear systems. Such experimental data can also provide additional constraints for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of fission models. In the present work, the Np-237(n,f) cross section was studied at the EAR2 vertical beam-line at CERN's n_TOF facility, over a wide range of neutron energies, from meV to MeV, using the time-of-flight technique and a set-up based on Micromegas detectors, in an attempt to provide accurate experimental data. Preliminary results in the 200 keV - 14 MeV neutron energy range as well as the experimental procedure, including a description of the facility and the data handling and analysis, will be presented., IKY scholarships programme, European Social Fund (ESF) European Commission, Greek national funds through the action entitled Reinforcement of Postdoctoral Researchers
Published: 2020

16. Investigation of the Pu240(n,f) reaction at the n_TOF/EAR2 facility in the 9 meV–6 MeV range

Author: R. J. W. Frost, A. Goverdovski, A. Mengoni, M. Krtička, V. Furman, T. J. Wright, I. Duran, G. Tagliente, Petar Žugec, Javier Praena, S. Lo Meo, T. Martinez, L. Cosentino, K. Deo, G. Vannini, V. Ketlerov, D. Bosnar, E. Dupont, A. Musumarra, Tatsuya Katabuchi, A. Ventura, M. Mirea, M. Mastromarco, S. Warren, A. Kimura, S. Heinitz, V. Variale, S. Barros, A. Tsinganis, Massimo Barbagallo, F. R. Palomo-Pinto, M. Caamaño, Rene Reifarth, E. Chiaveri, D. G. Jenkins, Anton Wallner, Stefan Schmidt, C. Paradela, Rugard Dressler, F. Calviño, Tanja Heftrich, P. F. Mastinu, L. Audouin, M. Licata, H. Leeb, J. M. Quesada, L. Tassan-Got, J. Balibrea, S. V. Suryanarayana, F. Mingrone, C. Lederer, I. Knapova, A. Riego-Perez, J. Perkowski, R. Vlastou, J. Marganiec, S. Valenta, Ariel Tarifeño-Saldivia, A. J. M. Plompen, F. Gunsing, P. Vaz, N. Colonna, Marco Calviani, E. Berthoumieux, P. Kavrigin, Ralf Nolte, A. G. Smith, M. A. Cortés-Giraldo, F. Cerutti, Cristian Massimi, A. Pavlik, E. Leal-Cidoncha, O. Aberle, E. Griesmayer, L. A. Damone, C. Domingo-Pardo, Hideo Harada, A. Hernández-Prieto, M. Sabaté-Gilarte, Kathrin Göbel, Vasilis Vlachoudis, V. Bécares, M. S. Robles, Thomas Rauscher, Jan Heyse, M. Kokkoris, C. Rubbia, Pedro G. Ferreira, Mario Weigand, C. Weiss, D. Cano-Ott, Y. Kadi, M. Diakaki, F. Bečvář, M. Bacak, E. Mendoza, Peter Schillebeeckx, J. Lerendegui-Marco, D. Macina, Carlos Guerrero, J. L. Tain, J. I. Porras, T. Glodariu, Roberto Losito, I. F. Gonçalves, Niko Kivel, B. Fernández-Domínguez, E. González-Romero, F. Käppeler, Fabio Belloni, A. R. García, Francesca Matteucci, M. Brugger, C. Beinrucker, V. Khryachkov, P. M. Milazzo, Ioana Gheorghe, N. Patronis, A. K. Saxena, Arnaud Ferrari, S. Montesano, J. Billowes, E. Jericha, A. Stamatopoulos, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, P. V. Sedyshev, J. Andrzejewski, and G. Cortes
Subjects: Physics, Nuclear transmutation, 010308 nuclear & particles physics, Fission, Monte Carlo method, Radioactive waste, MicroMegas detector, 7. Clean energy, 01 natural sciences, Neutron temperature, Spent nuclear fuel, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics
Abstract: Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimization and improvement of safety margins of such systems. One such case is Pu240, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the Pu240(n,f) cross section was previously attempted at the CERN n_TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1, the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high α activity of the fission foils, therefore the measurement could not be successfully completed. Purpose: It is aimed to determine whether it is feasible to study neutron-induced fission at n_TOF/EAR2 and provide data on the Pu240(n,f) reaction in energy regions requested for applications. Methods: The study of the Pu240(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster, thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analyzed with an optimized pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology, and other corrections were estimated via Monte Carlo simulations of the experimental setup. Results: This new measurement of the Pu240(n,f) cross section yielded data from 9meV up to 6MeV incident neutron energy and fission resonance kernels were extracted up to 10keV. Conclusions: Neutron-induced fission of high activity samples can be successfully studied at the n_TOF/EAR2 facility at CERN covering a wide range of neutron energies, from thermal to a few MeV.
Published: 2020

17. Measurement of the Pu-242(n,gamma) cross section from thermal to 500 keV at the Budapest research reactor and CERN n_TOF-EAR1 facilities

Author: O. Aberle, G. Cortes, C. Rubbia, Rugard Dressler, V. Khryachkov, P. M. Milazzo, Pedro G. Ferreira, Mario Weigand, A. Oprea, Tamás Belgya, A. Goverdovski, L. Cosentino, E. Jericha, A. Tsinganis, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, L. Audouin, F. Mingrone, K. Rajeev, J. Lerendegui-Marco, J. L. Tain, A. Kimura, D. M. Castelluccio, J. Andrzejewski, Francesca Matteucci, I. Knapova, A. Musumarra, F. Cerutti, Nicola Colonna, M. A. Cortés-Giraldo, T. Martinez, Niko Kivel, I. F. Gonçalves, I. Duran, Mario Barbagallo, F. Gunsing, V. Vlachoudis, G. Vannini, A. R. García, Cristian Massimi, P. Vaz, P. J. Woods, P. C. Rout, M. Caamaño, Tanja Heftrich, C. Weiss, G. Tagliente, C. Lederer, Alberto Ventura, J. Marganiec, A. Riego-Perez, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Mirea, V. Bécares, M. Brugger, D. Macina, S. Heinitz, Carlos Guerrero, R. Vlastou, D. Cano-Ott, M. Diakaki, Y. Kadi, A. Pavlik, F. Calviño, H. Leeb, B. Fernández-Domínguez, A. Casanovas, F. Käppeler, E. Chiaveri, Javier Praena, S. Lo Meo, N. Patronis, A. K. Saxena, C. Domingo-Pardo, E. Berthoumieux, Diego Vescovi, J. Perkowski, S. Valenta, Arnaud Ferrari, D. G. Jenkins, P. F. Mastinu, F. Bečvář, M. Bacak, Marco Calviani, C. Beinrucker, C. Wolf, P. Kavrigin, Kathrin Göbel, E. Mendoza, Alberto Mengoni, A. G. Smith, Ralf Nolte, J. Billowes, Jan Heyse, E. Leal-Cidoncha, Peter Schillebeeckx, E. Griesmayer, Tatsuya Katabuchi, D. Bosnar, L. A. Damone, M. Krtiička, R. Cardella, Emilio Andrea Maugeri, S. Barros, M. Kokkoris, A. Gawlik, J. I. Porras, Rene Reifarth, T. Glodariu, Thomas Rauscher, S. Warren, Roberto Losito, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Y. H. Chen, V. Variale, P. V. Sedyshev, Arnd R. Junghans, Petar Žugec, E. González-Romero, V. Ketlerov, V. Furman, Klaus Eberhardt, T. J. Wright, S. Montesano, A. Stamatopoulos, M. Mastromarco, Anton Wallner, J. Balibrea, M. Sabaté-Gilarte, Hideo Harada, E. Dupont, Boglárka Maróti, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Large Hadron Collider, Isotope, 010308 nuclear & particles physics, Fission, QC1-999, n_TOF, 242Pu, neutron capture, neutron time of flight, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Resonance (particle physics), Nuclear physics, Stack (abstract data type), 0103 physical sciences, Neutron, Research reactor, Nuclear Physics - Experiment, Neutron activation analysis, 010306 general physics
Abstract: The design and operation of innovative nuclear systems requires a better knowledge of the capture and fission cross sections of the Pu isotopes. For the case of capture on 242Pu, a reduction of the uncertainty in the fast region down to 8-12% is required. Moreover, aiming at improving the evaluation of the fast energy range in terms of average parameters, the OECD NEA High Priority Request List (HPRL) requests high-resolution capture measurements with improved accuracy below 2 keV. The current uncertainties also affect the thermal point, where previous experiments deviate from each other by 20%. A fruitful collaboration betwen JGU Mainz and HZ Dresden-Rossendorf within the EC CHANDA project resulted in a 242Pu sample consisting of a stack of seven fission-like targets making a total of 95(4) mg of 242Pu electrodeposited on thin (11.5 μm) aluminum backings. This contribution presents the results of a set of measurements of the 242Pu(n, γ) cross section from thermal to 500 keV combining different neutron beams and techniques. The thermal point was determined at the Budapest Research Reactor by means of Neutron Activation Analysis and Prompt Gamma Analysis, and the resolved (1 eV - 4 keV) and unresolved (1 - 500 keV) resonance regions were measured using a set of four Total Energy detectors at the CERN n_TOF-EAR1. European Commission 334315, 605203 Ministerio de Economía y Competitividad FPA2013-45083-P, FPA2014-53290-C2-2-P, FPA2016-77689-C2-1-R German Federal Ministry for Education and Research (BMBF) 03NUK13A
Published: 2020

18. First results of the 241Am(n,f) cross section measurement at the Experimental Area 2 of the n_TOF facility at CERN

Author: M. Bacak, S. Heinitz, Y. Kadi, C. Petrone, O. Aberle, M. A. Millán-Callado, J. L. Tain, G. Cortes, M. Mastromarco, Z. Eleme, G. Vannini, M. Caamaño, P. J. Davies, A. Masi, S. Valenta, B. Fernández-Domíngez, Massimo Barbagallo, Anton Wallner, A. S. Brown, D. G. Jenkins, Marco Calviani, Rene Reifarth, B. Thomas, A. G. Smith, Alexandru Negret, J. Andrzejewski, A. Oprea, L. Audouin, F. Cerutti, F. Käppeler, J. M. Quesada, L. Tassan-Got, Emilio Andrea Maugeri, Rugard Dressler, M. Dietz, P. M. Milazzo, D. Bosnar, M. Kokkoris, V. Babiano-Suarez, Sergio Cristallo, M. A. Cortés-Giraldo, V. Alcayne, C. Rubbia, A. Tsinganis, Luciano Piersanti, A. Kimura, F. Ogállar, P. J. Woods, T. Martinez, E. Jericha, Paolo Finocchiaro, A. Manna, Nicola Colonna, E. Dupont, R. Vlastou, Vasilis Vlachoudis, Y. Kopatch, Dorothea Schumann, J. Moreno-Soto, N. Patronis, A. K. Saxena, I. Ferro-Gonçalves, Simone Gilardoni, I. Duran, G. Tagliente, Q. Ducasse, Arnaud Ferrari, L. Caballero, E. Berthoumieux, I. Ladarescu, Kathrin Göbel, U. Jiri, D. Ramos Doval, Jan Heyse, E. Chiaveri, P. F. Mastinu, A. Casanovas, D. Cano-Ott, S. Urlass, S. Bennett, A. Sekhar, M. Diakaki, A. Stamatopoulos, A. Gawlik, Javier Praena, L. Cosentino, V. Furman, T. J. Wright, N. V. Sosnin, I. Knapova, P. Vaz, Annamaria Mazzone, Petar Žugec, L. A. Damone, P. Sprung, Alberto Ventura, F. Calviño, A. Pavlik, C. Domingo-Pardo, E. Pirovano, V. Michalopoulou, J. Perkowski, E. Mendoza, E. González-Romero, F. Gunsing, Peter Schillebeeckx, Cristian Massimi, A. Mengoni, D. Macina, Carlos Guerrero, R. Garg, M. Krticˇka, Claudia Lederer-Woods, P. Torres-Sánchez, Deniz Kurtulgil, M. Sabaté-Gilarte, Maurizio Busso, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Ignacio Porras, Diego Vescovi, J. Lerendegui-Marco, S. Amaducci, A. Musumarra, F. Mingrone, V. Variale, Dimitri Rochman, Arnd R. Junghans, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Large Hadron Collider, Materials science, Nuclear transmutation, Isotope, 010308 nuclear & particles physics, n_TOF, 241Am, fission, neutron time of flight, 4. Education, Nuclear engineering, Physics, QC1-999, Radioactive waste, MicroMegas detector, Actinide, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Incineration, 13. Climate action, Neutron flux, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics
Abstract: This research is co-financed by Greece and the European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning in the context of the project "Strengthening Human Resources Research Potential via Doctorate Research" (MIS-5000432), implemented by the State Scholarships Foundation (IKY). Also, the authors would like to acknowledge the support of the European Commission under the CHANDA project (7th Framework Programme)., Feasibility, design and sensitivity studies on innovative nuclear reactors that could address the issue of nuclear waste transmutation using fuels enriched in minor actinides, require high accuracy cross section data for a variety of neutron-induced reactions from thermal energies to several tens of MeV. The isotope Am-241 (T-1/2= 433 years) is present in high-level nuclear waste (HLW), representing about 1.8 % of the actinide mass in spent PWR UOx fuel. Its importance increases with cooling time due to additional production from the beta-decay of Pu-241 with a half-life of 14.3 years. The production rate of 241Am in conventional reactors, including its further accumulation through the decay of Pu-241 and its destruction through transmutation/incineration are very important parameters for the design of any recycling solution. In the present work, the Am-241(n,f) reaction cross-section was measured using Micromegas detectors at the Experimental Area 2 of the n_TOF facility at CERN. For the measurement, the U-235(n,f) and U-238(n,f) reference reactions were used for the determination of the neutron flux. In the present work an overview of the experimental setup and the adopted data analysis techniques is given along with preliminary results., European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning MIS-5000432, European Commission under the CHANDA project (7th Framework Programme)
Published: 2020

19. Status and perspectives of the neutron time-of-flight facility n_TOF at CERN

Author: D. Bosnar, Rugard Dressler, A. Tsinganis, N. V. Sosnin, S. Bennett, A. Stamatopoulos, Luciano Piersanti, Nicola Colonna, Annamaria Mazzone, Petar Žugec, Z. Eleme, P. Sprung, F. Ogállar, A. Kimura, G. Cortes, A. Masi, V. Variale, O. Aberle, G. Tagliente, Dimitri Rochman, Arnd R. Junghans, A. Pavlik, D. Ramos Doval, D. G. Jenkins, E. Jericha, Y. Kopatch, C. Domingo-Pardo, M. A. Millán-Callado, Maurizio Busso, L. Audouin, M. Krtička, Emilio Andrea Maugeri, M. Kokkoris, Paolo Finocchiaro, Dorothea Schumann, E. Pirovano, T. Martinez, Rene Reifarth, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. A. Cortés-Giraldo, A. Casanovas, Alexandru Negret, F. Cerutti, M. Bacak, A. S. Brown, P. J. Woods, Ignacio Porras, F. Käppeler, J. Andrzejewski, I. Knapova, Y. Kadi, J. M. Quesada, D. Cano-Ott, A. Sekhar, M. Diakaki, P. Vaz, F. Gunsing, I. Ferro-Gonçalves, G. Vannini, L. Cosentino, V. Vlachoudis, F. Mingrone, Cristian Massimi, L. Tassan-Got, Simone Gilardoni, N. Patronis, Sergio Cristallo, A. K. Saxena, Arnaud Ferrari, Alberto Mengoni, I. Ladarescu, Diego Vescovi, V. Furman, T. J. Wright, Claudia Lederer-Woods, M. Caamaño, V. Michalopoulou, E. Mendoza, B. Fernández-Domíngez, A. Oprea, Alberto Ventura, P. M. Milazzo, J. Lerendegui-Marco, S. Amaducci, U. Jiri, L. Caballero, Peter Schillebeeckx, Kathrin Göbel, Deniz Kurtulgil, J. Moreno-Soto, R. Vlastou, E. Berthoumieux, P. J. Davies, Jan Heyse, A. Musumarra, E. Chiaveri, F. Calviño, P. F. Mastinu, C. Rubbia, J. Perkowski, Javier Praena, S. Heinitz, C. Petrone, Q. Ducasse, J. L. Tain, D. Macina, Carlos Guerrero, S. Valenta, R. Garg, Marco Calviani, A. G. Smith, M. Dietz, S. Urlass, V. Babiano-Suarez, A. Manna, A. Gawlik, E. González-Romero, P. Torres-Sánchez, M. Mastromarco, Massimo Barbagallo, Anton Wallner, M. Sabaté-Gilarte, I. Duran, L. A. Damone, B. Thomas, V. Alcayne, E. Dupont, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Large Hadron Collider, Computer science, Physics, QC1-999, 020209 energy, Nuclear engineering, Nuclear Theory, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutron temperature, Nuclear technology, Upgrade, Neutron flux, 0103 physical sciences, n_TOF, CERN, neutron time of flight, 0202 electrical engineering, electronic engineering, information engineering, Neutron cross section, Nuclear astrophysics, Nuclear Physics - Experiment, Neutron, 010306 general physics, Nuclear Experiment
Abstract: International audience; Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia [1], the neutron time of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for wide-energy spectrum neutron cross section measurements. Thanks to the combination of excellent neutron energy resolution and high instantaneous neutron flux available in the two experimental areas, the second of which has been constructed in 2014, n_TOF is providing a wealth of new data on neutron-induced reactions of interest for nuclear astrophysics, advanced nuclear technologies and medical applications. The unique features of the facility will continue to be exploited in the future, to perform challenging new measurements addressing the still open issues and long-standing quests in the field of neutron physics. In this document the main characteristics of the n_TOF facility and their relevance for neutron studies in the different areas of research will be outlined, addressing the possible future contribution of n_TOF in the fields of nuclear astrophysics, nuclear technologies and medical applications. In addition, the future perspectives of the facility will be described including the upgrade of the spallation target, the setup of an imaging installation and the construction of a new irradiation area.
Published: 2020

20. New reaction rates for the destruction of $^7$Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem

Author: Z. Eleme, M. Mastromarco, Massimo Barbagallo, I. Knapova, Anton Wallner, S. Valenta, Rugard Dressler, P. Vaz, M. Krtička, Marco Calviani, A. Gawlik, G. Vannini, A. G. Smith, A. Tsinganis, T. Martinez, V. Furman, T. J. Wright, Alberto Ventura, M. Dietz, Luciano Piersanti, M. Caamaño, Nicola Colonna, P. J. Woods, I. Ladarescu, Vasilis Vlachoudis, E. González-Romero, F. Ogállar, M. Sabaté-Gilarte, P. J. Davies, N. Patronis, A. K. Saxena, Arnaud Ferrari, L. Audouin, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, G. Tagliente, D. Ramos Doval, O. Aberle, E. Chiaveri, J. Moreno-Soto, Alberto Mengoni, E. Dupont, A. Pavlik, P. Sprung, G. Cortes, P. F. Mastinu, M. A. Millán-Callado, L. A. Damone, D. Macina, Carlos Guerrero, C. Domingo-Pardo, A. Kimura, A. Casanovas, R. Garg, P. Torres-Sánchez, S. Bennett, M. Bacak, A. Stamatopoulos, A. Masi, Emilio Andrea Maugeri, L. Cosentino, J. L. Tain, D. G. Jenkins, Kathrin Göbel, Y. Kadi, F. Gunsing, I. Duran, M. Kokkoris, D. Bosnar, Jan Heyse, E. Pirovano, S. Urlass, M. A. Cortés-Giraldo, E. Jericha, Claudia Lederer-Woods, Cristian Massimi, B. Thomas, Deniz Kurtulgil, V. Alcayne, R. Vlastou, Rene Reifarth, Paolo Finocchiaro, E. Berthoumieux, Dorothea Schumann, J. M. Quesada, Y. Kopatch, L. Tassan-Got, Sergio Cristallo, C. Rubbia, Q. Ducasse, V. Michalopoulou, F. Mingrone, F. Calviño, E. Mendoza, J. Perkowski, V. Variale, Peter Schillebeeckx, Dimitri Rochman, Arnd R. Junghans, S. Heinitz, C. Petrone, I. Ferro-Gonçalves, A. S. Brown, P. M. Milazzo, B. Fernández-Domíngez, A. Oprea, Ignacio Porras, D. Cano-Ott, A. Sekhar, M. Diakaki, Maurizio Busso, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. Lerendegui-Marco, S. Amaducci, Alexandru Negret, F. Käppeler, V Babiano-Suarez, A. Manna, J. Andrzejewski, F. Cerutti, L. Caballero, Simone Gilardoni, U. Jiri, Javier Praena, Diego Vescovi, A. Musumarra, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Physics, Range (particle radiation), Large Hadron Collider, n_TOF, 7Be, big bang nucleosynthesis, cosmological lithium problem, 010308 nuclear & particles physics, QC1-999, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Reaction rate, Nuclear physics, Big Bang nucleosynthesis, chemistry, 13. Climate action, 0103 physical sciences, Thermal, Neutron, Lithium, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment
Abstract: New measurements of the7Be(n,α)4He and7Be(n,p)7Li reaction cross sections from thermal to keV neutron energies have been recently performed at CERN/n_TOF. Based on the new experimental results, astrophysical reaction rates have been derived for both reactions, including a proper evaluation of their uncertainties in the thermal energy range of interest for big bang nucleosynthesis studies. The new estimate of the7Be destruction rate, based on these new results, yields a decrease of the predicted cosmological7Li abundance insufficient to provide a viable solution to the cosmological lithium problem.
Published: 2020

21. Study of photon strength functions of 241Pu and 245Cm from neutron capture measurements

Author: G. Cortes, D. Bosnar, Z. Talip, J. L. Tain, Rene Reifarth, A. Kimura, Niko Kivel, S. Valenta, Marco Calviani, A. G. Smith, E. Chiaveri, P. F. Mastinu, M. Dietz, N. V. Sosnin, F. Ogállar, A. Masi, Annamaria Mazzone, V. Babiano-Suarez, D. G. Jenkins, Petar Žugec, Y. Kadi, G. Tagliente, D. Ramos Doval, A. Pavlik, Emilio Andrea Maugeri, B. Fernández-Domíngez, Francesca Matteucci, C. Domingo-Pardo, M. Kokkoris, A. Oprea, A. Manna, C. Rubbia, A. Casanovas, Z. Eleme, M. A. Cortés-Giraldo, A. Mengoni, J. M. Quesada, M. Krtička, J. Andrzejewski, A. V. Skarbeli, L. Caballero, L. Tassan-Got, J. Ulrich, I. Duran, P. J. Woods, F. Cerutti, M. Mastromarco, T. Martinez, Sergio Cristallo, R. Vlastou, D. Radeck, L. Audouin, P. Vaz, V. Michalopoulou, N. Patronis, L. Cosentino, A. K. Saxena, E. Berthoumieux, G. Vannini, Alberto Ventura, Arnaud Ferrari, Y. H. Chen, I. Ladarescu, A. Gawlik, Alexandru Negret, M. Caamaño, Massimo Barbagallo, J. Billowes, Javier Praena, S. Lo Meo, F. Käppeler, O. Aberle, Maurizio Busso, I. Ferro-Gonçalves, E. González-Romero, D. Cano-Ott, Anton Wallner, M. Diakaki, Simone Gilardoni, Ariel Tarifeño-Saldivia, S. J. Lonsdale, A. Musumarra, Ralf Nolte, V. Furman, T. J. Wright, F. Mingrone, L. A. Damone, V. Variale, Dimitri Rochman, Ignacio Porras, A. Stamatopoulos, M. Sabaté-Gilarte, J. Lerendegui-Marco, S. Amaducci, G. Bellia, P. Torres-Sánchez, Kathrin Göbel, Jan Heyse, F. Gunsing, Rugard Dressler, A. Tsinganis, Luciano Piersanti, Nicola Colonna, Vasilis Vlachoudis, Cristian Massimi, M. Bacak, T. Glodariu, F. Bečvář, Y. Kopatch, E. Mendoza, Peter Schillebeeckx, Claudia Lederer-Woods, V. Bécares, Deniz Kurtulgil, F. Calviño, J. Perkowski, D. Macina, Carlos Guerrero, R. Garg, S. Urlass, A. S. Brown, P. M. Milazzo, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, S. Heinitz, V. Alcayne, E. Dupont, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Photon, Calorimeter (particle physics), 010308 nuclear & particles physics, QC1-999, Solid angle, n_TOF, photon strength function, 241Pu, 245Cm, neutron time of flight, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Spectral line, Nuclear physics, Neutron capture, 0103 physical sciences, Neutron, 010306 general physics, Absorption (electromagnetic radiation)
Abstract: International audience; We have measured theγ-rays following neutron capture on240Pu and244Cm at the n_TOF facility at CERN with the Total Absorption Calorimeter (TAC) and with C6D6 organic scintillators. The TAC is made of 40 BaF2 crystals operating in coincidence and covering almost the entire solid angle. This allows to obtain information concerning the energy spectra and the multiplicity of the measured captureγ-ray cascades. Additional information is also obtained from the C6D6 detectors. We have analyzed the measured data in order to draw conclusions about the Photon Strength Functions (PSFs) of241Pu and245Cm below their neutron separation energies. The analysis has been performed by fitting the PSFs to the experimental results, using the differential evolution method, in order to find neutron capture cascades capable of reproducing at the same time a great variety of deposited energy spectra.
Published: 2020

22. Measurement of the 244Cm capture cross sections at both CERN n_TOF experimental areas

Author: F. Calviño, G. Cortes, J. Perkowski, Rugard Dressler, F. Gunsing, F. Ogállar, S. Valenta, Y. Kopatch, Cristian Massimi, A. Tsinganis, G. Tagliente, D. Ramos Doval, Marco Calviani, Luciano Piersanti, P. J. Woods, Simone Gilardoni, Claudia Lederer-Woods, Nicola Colonna, J. Andrzejewski, A. Mengoni, A. G. Smith, M. Dietz, Vasilis Vlachoudis, I. Duran, M. A. Cortés-Giraldo, E. Chiaveri, N. Patronis, P. F. Mastinu, A. K. Saxena, Deniz Kurtulgil, A. Kimura, B. Fernández-Domíngez, G. Bellia, O. Aberle, A. Casanovas, Arnaud Ferrari, P. Torres-Sánchez, I. Ladarescu, M. Sabaté-Gilarte, P. Vaz, J. Billowes, A. Oprea, E. Jericha, Paolo Finocchiaro, L. Audouin, V. Michalopoulou, Dorothea Schumann, N. V. Sosnin, Annamaria Mazzone, Ralf Nolte, F. Cerutti, Alberto Ventura, L. Cosentino, Petar Žugec, G. Vannini, S. Urlass, L. A. Damone, J. L. Tain, M. Bacak, A. S. Brown, Z. Talip, A. Pavlik, Javier Praena, S. Lo Meo, M. Krtička, Emilio Andrea Maugeri, Niko Kivel, M. Mastromarco, C. Domingo-Pardo, M. Kokkoris, M. Caamaño, F. Bečvář, Rene Reifarth, Massimo Barbagallo, T. Martinez, T. Glodariu, Anton Wallner, A. Masi, D. Macina, Carlos Guerrero, P. M. Milazzo, E. Mendoza, S. Heinitz, C. Rubbia, Y. Kadi, R. Garg, D. G. Jenkins, A. Gawlik, D. Bosnar, Peter Schillebeeckx, A. Stamatopoulos, D. Cano-Ott, M. Diakaki, Y. H. Chen, J. M. Quesada, L. Tassan-Got, Z. Eleme, Kathrin Göbel, Sergio Cristallo, E. González-Romero, Jan Heyse, V. Alcayne, J. Ulrich, V. Bécares, R. Vlastou, D. Radeck, E. Berthoumieux, E. Dupont, F. Mingrone, V. Furman, T. J. Wright, Alexandru Negret, F. Käppeler, V. Babiano-Suarez, A. Manna, A. Musumarra, J. Lerendegui-Marco, S. Amaducci, Maurizio Busso, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Ignacio Porras, V. Variale, Dimitri Rochman, I. Ferro-Gonçalves, Francesca Matteucci, L. Caballero, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Materials science, Isotope, Nuclear transmutation, n_TOF, 244Cm, neutron capture, neutron time of flight, Physics, QC1-999, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, 030218 nuclear medicine & medical imaging, Calorimeter, Nuclear physics, 03 medical and health sciences, Neutron capture, 0302 clinical medicine, 13. Climate action, 0103 physical sciences, Neutron cross section, Neutron, Nuclear Physics - Experiment, Decay heat, 010306 general physics, Burnup
Abstract: Accurate neutron capture cross section data for minor actinides (MAs) are required to estimate the production and transmutation rates of MAs in light water reactors with a high burnup, critical fast reactors like Gen-IV systems and other innovative reactor systems such as accelerator driven systems (ADS). Capture reactions of244Cm open the path for the formation of heavier Cm isotopes and of heavier elements such as Bk and Cf. In addition,244Cm shares nearly 50% of the total actinide decay heat in irradiated reactor fuels with a high burnup, even after three years of cooling.Experimental data for this isotope are very scarce due to the difficulties of providing isotopically enriched samples and because the high intrinsic activity of the samples requires the use of neutron facilities with high instantaneous flux. The only two previous experimental data sets for this neutron capture cross section have been obtained in 1969 using a nuclear explosion and, more recently, at J-PARC in 2010. The neutron capture cross sections have been measured at n_TOF with the same samples that the previous experiments in J-PARC. The samples were measured at n_TOF Experimental Area 2 (EAR-2) with three C6D6detectors and also in Experimental Area 1 (EAR-1) with the Total Absorption Calorimeter (TAC). Preliminary results assessing the quality and limitations of these new experimental datasets are presented for the experiments in both areas. Preliminary yields of both measurements will be compared with evaluated libraries for the first time.
Published: 2020

23. Monte Carlo simulations and n-p differential scattering data measured with Proton Recoil Telescopes

Author: Z. Eleme, M. Bacak, N. V. Sosnin, S. Urlass, Annamaria Mazzone, Petar Žugec, Alexandru Negret, J. Moreno-Soto, F. Käppeler, P. Sprung, Rugard Dressler, C. Rubbia, P. Torres-Sánchez, A. Tsinganis, E. Dupont, E. Pirovano, V. Michalopoulou, J. Andrzejewski, Luciano Piersanti, E. Mendoza, Nicola Colonna, Q. Ducasse, Vasilis Vlachoudis, A. Mengoni, Peter Schillebeeckx, M. Sabaté-Gilarte, Diego Vescovi, D. Macina, Carlos Guerrero, I. Duran, Simone Gilardoni, R. Garg, S. Valenta, Marco Calviani, J. L. Tain, Emilio Andrea Maugeri, V. Variale, Dimitri Rochman, Arnd R. Junghans, S. Bennett, S. Heinitz, A. G. Smith, M. Dietz, M. Kokkoris, V. Furman, T. J. Wright, M. A. Cortés-Giraldo, D. Cano-Ott, A. Stamatopoulos, C. Petrone, A. Pavlik, V. Babiano-Suarez, R. Vlastou, A. Sekhar, M. Diakaki, E. Berthoumieux, U. Jiri, Claudia Lederer-Woods, Deniz Kurtulgil, C. Domingo-Pardo, E. Chiaveri, P. F. Mastinu, F. Calviño, A. Kimura, B. Fernández-Domíngez, A. Oprea, M. Mastromarco, L. Cosentino, B. Thomas, Y. Kadi, A. Musumarra, Maurizio Busso, Massimo Barbagallo, J. Perkowski, A. Manna, P. J. Woods, Kathrin Göbel, F. Gunsing, Anton Wallner, Ariel Tarifeño-Saldivia, S. J. Lonsdale, N. Patronis, A. K. Saxena, Jan Heyse, F. Ogállar, J. Lerendegui-Marco, Cristian Massimi, Arnaud Ferrari, V. Alcayne, F. Cerutti, L. A. Damone, S. Amaducci, G. Tagliente, D. Ramos Doval, I. Ferro-Gonçalves, I. Ladarescu, G. Cortes, D. Bosnar, F. Mingrone, A. Masi, Y. Kopatch, M. Krtička, A. Casanovas, D. G. Jenkins, Javier Praena, T. Martinez, Ignacio Porras, L. Audouin, G. Vannini, I. Knapova, M. Caamaño, P. Vaz, P. J. Davies, Alberto Ventura, L. Caballero, O. Aberle, M. A. Millán-Callado, A. Gawlik, E. González-Romero, Rene Reifarth, J. M. Quesada, L. Tassan-Got, Sergio Cristallo, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, A. S. Brown, N. Terranova, P. M. Milazzo, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Physics, 010308 nuclear & particles physics, Scattering, Fission, QC1-999, Monte Carlo method, Nuclear Theory, n_TOF, proton recoil, Monte Carlo simulations, neutron time of flight, Neutron radiation, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Recoil, Neutron flux, Proton transport, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment
Abstract: The authors wish to thank the National Center of the INFN for Research and Development in Information and Communication Technologies (CNAF) for their computational support., The neutron-induced fission cross section of U-235, a standard at thermal energy and between 0.15 MeV and 200 MeV, plays a crucial role in nuclear technology applications. The long-standing need of improving cross section data above 20 MeV and the lack of experimental data above 200 MeV motivated a new experimental campaign at the n_TOF facility at CERN. The measurement has been performed in 2018 at the experimental area 1 (EAR1), located at 185 m from the neutron-producing target (the experiment is presented by A. Manna et al. in a contribution to this conference). The U-235(n,f) cross section from 20 MeV up to about 1 GeV has been measured relative to the H-1(n,n)H-1 reaction, which is considered the primary reference in this energy region. The neutron flux impinging on the U-235 sample (a key quantity for determining the fission events) has been obtained by detecting recoil protons originating from n-p scattering in a C2H4 sample. Two Proton Recoil Telescopes (PRT), consisting of several layers of solid-state detectors and fast plastic scintillators, have been located at proton scattering angles of 25.07 degrees and 20.32 degrees, out of the neutron beam. The PRTs exploit the Delta E-E technique for particle identification, a basic requirement for the rejection of charged particles from neutron-induced reactions in carbon. Extensive Monte Carlo simulations were performed to characterize proton transport through the different slabs of silicon and scintillation detectors, to optimize the experimental set-up and to deduce the efficiency of the whole PRT detector. In this work we compare measured data collected with the PRTs with a full Monte Carlo simulation based on the Geant-4 toolkit.
Published: 2020

24. First results of the Th-230(n,f) cross section measurements at the CERN n_TOF facility

Author: P. Torres-Sánchez, A. Mengoni, F. Ogállar, M. Mastromarco, Massimo Barbagallo, Anton Wallner, N. V. Sosnin, G. Tagliente, Rugard Dressler, A. Musumarra, Annamaria Mazzone, G. Cortes, I. Ferro-Gonçalves, P. J. Woods, D. Ramos Doval, Y. Kopatch, M. Sabaté-Gilarte, A. Oprea, A. Pavlik, Petar Žugec, P. Sprung, A. Tsinganis, C. Domingo-Pardo, N. Patronis, A. K. Saxena, Simone Gilardoni, L. Audouin, J. L. Tain, Luciano Piersanti, M. A. Cortés-Giraldo, Arnaud Ferrari, Alexandru Negret, E. Chiaveri, Nicola Colonna, F. Käppeler, P. F. Mastinu, A. Casanovas, Vasilis Vlachoudis, I. Ladarescu, E. Pirovano, U. Jiri, A. Kimura, E. Dupont, O. Aberle, S. Urlass, G. Vannini, M. A. Millán-Callado, S. Bennett, V. Variale, V. Babiano-Suarez, Dimitri Rochman, Arnd R. Junghans, J. Andrzejewski, A. Gawlik, B. Femández-Domíngez, A. Stamatopoulos, L. Cosentino, M. Caamaño, R. Vlastou, V. Michalopoulou, Maurizio Busso, Y. Kadi, E. Jericha, E. Berthoumieux, P. J. Davies, Emilio Andrea Maugeri, E. Mendoza, Z. Eleme, Paolo Finocchiaro, L. A. Damone, I. Knapova, Dorothea Schumann, M. Kokkoris, Javier Praena, A. Manna, Peter Schillebeeckx, Claudia Lederer-Woods, Rene Reifarth, P. Vaz, Deniz Kurtulgil, M. Bacak, B. Thomas, J. Moreno-Soto, A. S. Brown, Ariel Tarifeño-Saldivia, S. J. Lonsdale, F. Calviño, Kathrin Göbel, A. Masi, I. Duran, Alberto Ventura, L. Caballero, M. Krtiička, C. Rubbia, E. González-Romero, J. Perkowski, V. Furman, T. J. Wright, F. Cerutti, D. G. Jenkins, S. Heinitz, Jan Heyse, D. Bosnar, C. Petrone, F. Gunsing, Ignacio Porras, V. Alcayne, D. Macina, Carlos Guerrero, Q. Ducasse, D. Cano-Ott, A. Sekhar, M. Diakaki, P. M. Milazzo, J. M. Quesada, T. Martinez, R. Garg, Cristian Massimi, S. Valenta, L. Tassan-Got, Marco Calviani, A. G. Smith, M. Dietz, Sergio Cristallo, F. Mingrone, J. Lerendegui-Marco, S. Amaducci, Diego Vescovi, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Physics, Range (particle radiation), n_TOF, 230Th, fission, neutron time of flight, Large Hadron Collider, Isotope, 010308 nuclear & particles physics, Fission, QC1-999, MicroMegas detector, Actinide, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Resonance (particle physics), Nuclear physics, Cross section (physics), 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics
Abstract: The study of neutron-induced reactions on actinides is of considerable importance for the design of advanced nuclear systems and alternative fuel cycles. Specifically, 230Th is produced from the α-decay of 234U as a byproduct of the 232Th/233U fuel cycle, thus the accurate knowledge of its fission cross section is strongly required. However, few experimental datasets exist in literature with large deviations among them, covering the energy range between 0.2 to 25 MeV. In addition, the study of the 230Th(n,f) cross-section is of great interest in the research on the fission process related to the structure of the fission barriers. Previous measurements have revealed a large resonance at En=715 keV and additional fine structures, but with high discrepancies among the cross-section values of these measurements. This contribution presents preliminary results of the 230Th(n,f) cross-section measurements at the CERN n_TOF facility. The high purity targets of the natural, but very rare isotope 230Th, were produced at JRC-Geel in Belgium. The measurements were performed at both experimental areas (EAR-1 and EAR-2) of the n_TOF facility, covering a very broad energy range from thermal up to at least 100 MeV. The experimental setup was based on Micromegas detectors with the 235U(n,f) and 238U(n,f) reaction cross-sections used as reference.
Published: 2020
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25. Measurement of the Ge70(n,γ) cross section up to 300 keV at the CERN n_TOF facility

Author: E. A. Maugeri, G. Cortes, A. Musumarra, Claudia Lederer-Woods, A. R. García, S. Warren, V. Variale, V. Bécares, C. Weiss, R. Vlastou, A. Tattersall, P. C. Rout, M. Brugger, F. Gunsing, Tanja Heftrich, P. V. Sedyshev, Cristian Massimi, P. Ferreira, Damir Bosnar, Y. Kadi, I. Knapova, M. Krtička, N. Patronis, M. A. Cortés-Giraldo, A. Riego-Perez, C. Beinrucker, D. M. Castelluccio, Alfredo Ferrari, Petar Žugec, P. Vaz, K. Göbel, M. Mirea, G. Tagliente, T. Martinez, K. Rajeev, B. Fernández-Domínguez, F. Calviño, H. Leeb, M. Bacak, G. Vannini, E. Leal-Cidoncha, Javier Praena, S. Lo Meo, I. Duran, Alberto Ventura, A. Kimura, T. Wright, Francesca Matteucci, V. Khryachkov, D. Macina, J. Perkowski, A. Gawlik, U. Battino, F. Mingrone, J. Andrzejewski, Thomas Rauscher, F. Käppeler, A. Pavlik, J. Marganiec, C. Domingo-Pardo, J. I. Porras, J. L. Tain, F. Bečvář, A. Saxena, Roberto Losito, S. Valenta, Carlos Guerrero, M. Kokkoris, Tatsuya Katabuchi, O. Aberle, C. Wolf, Mario Weigand, Mario Barbagallo, A. Casanovas, P. F. Mastinu, Marco Calviani, Carlo Rubbia, A. G. Smith, R. Dressler, E. Mendoza, S. Barros, L. Cosentino, D. Schumann, Philip Woods, Rene Reifarth, P. Kavrigin, E. Berthoumieux, N. Kivel, A. Tsinganis, Stefan Schmidt, L. Audouin, Nicola Colonna, V. Vlachoudis, E. González-Romero, J. M. Quesada, E. Chiaveri, L. Tassan-Got, E. Dupont, D. Cano-Ott, E. Griesmayer, Y. H. Chen, L. A. Damone, M. Caamaño, S. Heinitz, V. Furman, E. Jericha, V. Ketlerov, Alberto Mengoni, T. Glodariu, Paolo Finocchiaro, F. Cerutti, J. A. Ryan, D. G. Jenkins, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. Lerendegui-Marco, R. Cardella, I. F. Gonçalves, S. Montesano, A. Stamatopoulos, A. Oprea, J. Heyse, M. Mastromarco, Anton Wallner, J. Billowes, J. Balibrea, P. Schillebeeckx, Hideo Harada, M. Sabaté-Gilarte, M. Diakaki, R. Nolte, P. M. Milazzo, M. Dietz, and A. Goverdovski
Subjects: Physics, Standard solar model, Solar mass, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, 01 natural sciences, 7. Clean energy, Neutron temperature, Nuclear physics, Neutron capture, 13. Climate action, Nucleosynthesis, 0103 physical sciences, Neutron cross section, Astrophysics::Solar and Stellar Astrophysics, Neutron, Nuclear Experiment, 010306 general physics, s-process
Abstract: Neutron capture data on intermediate mass nuclei are of key importance to nucleosynthesis in the weak component of the slow neutron capture processes, which occurs in massive stars. The $(n,\gamma)$ cross section on $^{70}Ge$, which is mainly produced in the s process, was measured at the neutron time-of-flight facility n_TOF at CERN. Resonance capture kernels were determined up to 40 keV neutron energy and average cross sections up to 300 keV. Stellar cross sections were calculated from $kT=5 keV$ to $kT=100 keV$ and are in very good agreement with a previous measurement by Walter and Beer (1985) and recent evaluations. Average cross sections are in agreement with Walter and Beer (1985) over most of the neutron energy range covered, while they are systematically smaller for neutron energies above 150 keV. We have calculated isotopic abundances produced in s-process environments in a 25 solar mass star for two initial metallicities (below solar and close to solar). While the low metallicity model reproduces best the solar system germanium isotopic abundances, the close to solar model shows a good global match to solar system abundances in the range of mass numbers A=60–80.
Published: 2019

26. Preparation and characterization of 33S samples for 33S(n,α)30Si cross-section measurements at the n_TOF facility at CERN

Author: J. Praena, F.J. Ferrer, W. Vollenberg, M. Sabaté-Gilarte, B. Fernández, J. García-López, I. Porras, J.M. Quesada, S. Altstadt, J. Andrzejewski, L. Audouin, V. Bécares, M. Barbagallo, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, F. Calviño, M. Calviani, D. Cano-Ott, C. Carrapiço, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, I. Durán, C. Eleftheriadis, A. Ferrari, K. Fraval, V. Furman, K. Göbel, M.B. Gómez-Hornillos, S. Ganesan, A.R. García, G. Giubrone, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, C. Guerrero, F. Gunsing, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, T. Katabuchi, V. Ketlerov, V. Khryachkov, N. Kivel, P. Koehler, M. Kokkoris, J. Kroll, M. Krtička, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L.S. Leong, J. Lerendegui-Marco, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, E. Mendoza, A. Mengoni, P.M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, C. Paradela, A. Pavlik, J. Perkowski, A.J.M. Plompen, T. Rauscher, R. Reifarth, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, T. Wright, and P. Žugec
Subjects: Physics, Nuclear and High Energy Physics, Thin layers, 010308 nuclear & particles physics, Analytical chemistry, chemistry.chemical_element, Rutherford backscattering spectrometry, 7. Clean energy, 01 natural sciences, Copper, Kapton, Chromium, chemistry, 0103 physical sciences, Sublimation (phase transition), Neutron, 010306 general physics, Instrumentation, Titanium
Abstract: Thin 33S samples for the study of the 33S(n, α)30Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of 33S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. The samples have shown an excellent adherence with no mass loss after few years and no sublimation in vacuum at room temperature. The determination of the mass thickness of 33S has been performed by means of Rutherford backscattering spectrometry. The samples have been successfully tested under neutron irradiation.
Published: 2018

27. LHC and HL-LHC: Present and Future Radiation Environment in the High-Luminosity Collision Points and RHA Implications

Author: Maria Kastriotou, Salvatore Danzeca, Francesco Cerutti, Anton Lechner, Corinna Martinella, Simone Gilardoni, Markus Brugger, Yacine Kadi, Slawosz Uznanski, Ruben Garcia Alia, Yves Thurel, A. Tsinganis, Oliver Stein, and Alfredo Ferrari
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Large Hadron Collider, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, 02 engineering and technology, Superconducting magnet, 021001 nanoscience & nanotechnology, Collision, 01 natural sciences, Reliability engineering, Nuclear physics, Upgrade, Nuclear Energy and Engineering, 0103 physical sciences, Electronics, Detectors and Experimental Techniques, Electrical and Electronic Engineering, 0210 nano-technology, Radiation hardening
Abstract: The high-luminosity large hadron collider (HL-LHC) is a novel machine configuration which will rely on a number of key innovative technologies to enhance the performance of the present LHC machine as of 2025. The upgrade will also involve increased radiation levels that need to be predicted by combining scaled measurements and calculations in order to define the qualification requirements for electronic systems. In this paper, we describe such levels, first of all, by introducing the monitoring and calculation approaches used for the present LHC machine, and second, by applying scaling factors and dedicated simulations for the future HL-LHC accelerators. We present the levels according to the different areas relevant for the operation of electronics-based equipment, and discuss the associated radiation hardness assurance implications.
Published: 2018

28. The Nuclear astrophysics program at n_TOF (CERN)

Author: C. Massimi, E. Chiaveri, C. Rubbia, P. J. Woods, S. Warren, A. Casanovas, F. Mingrone, M. Sabaté-Gilarte, D. Bosnar, A. Oprea, J. M. Quesada, G. Vannini, E. González, J. A. Ryan, E. Berthoumieux, Sergio Cristallo, I. Porras, J. Perkowski, M. A. Cortés-Giraldo, Mario Barbagallo, G. Cortes, D. Kurtulgil, M. Kokkoris, M. S. Robles, A. Stamatopoulos, L. R. Dressler, M. Bacak, J. Kroll, P. Kavrigin, M. Krtička, C. Weiss, A. Pavlik, F. Gunsing, L. A. Damone, A. Ventura, J. Andrzejewski, A. Riego, T. Glodariu, V. Variale, J. L. Tain, E. Dupont, F. Käppeler, C. Lederer, C. Domingo-Pardo, J. Heyse, Christoph Langer, Dorothea Schumann, H. Leeb, D. Radeck, Ralf Nolte, P. Mastinu, V. Vlachoudis, L. Piersanti, M. Mastromarco, G. Tagliente, J. Marganiec, Y. H. Chen, R. Cardella, B. Fernández-Domínguez, S. Heinitz, D. Cano-Ott, A. Masi, V. Furman, A. S. Brown, P. Finocchiaro, E. Griesmayer, P. M. Milazzo, Anton Wallner, T. Wright, D. G. Jenkins, P. Schillebeeckx, Nicola Colonna, J. Balibrea, Cosentino, N. V. Sosnin, A. Negret, T. Martínez, S. Valenta, E. Jericha, P. Sedyshev, A. Hernandez-Prieto, E. Leal-Cidoncha, Petar Žugec, Simona Losito, E. A. Maugeri, Javier Praena, S. Lo Meo, A. Ferrari, L. Tassan-Got, A. Kalamara, Pedro G. Ferreira, A. Mazzone, L. Audouin, A. Tsinganis, M. Caamaño, I. Duran, Y. Kadi, A. Saxena, Hideo Harada, P. Vaz, D. Macina, Carlos Guerrero, S. Gilardoni, M. Mirea, A. G. Smith, N. Patronis, F. Cerutti, M. Diakaki, R. Vlastou, F. Calviño, Atsushi Kimura, R. Reifarth, J. Billowes, F. Bečvář, E. Mendoza, A. Musumarra, J. Lerendegui-Marco, I. F. Gonçalves, K. Göbel, Ariel Tarifeño-Saldivia, S. J. Lonsdale, O. Aberle, Giulia Clai, A. Gawlik, Thomas Rauscher, A. R. García, Marco Calviani, N. Kivel, A. Mengoni, A. Mallik, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Mengoni, A., Lo Meo, S., Clai, G., Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Colonna, N., La Cognata, M., Aberle, O., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Bečvář, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Cortés, G., Cortés-Giraldo, M. A., Cosentino, Null, Cristallo, S., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, L. R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Kroll, J., Krtička, M., Kurtulgil, D., Langer, C., Leal-Cidoncha, E., Lederer, C., Lerendegui-Marco, J., Leeb, H., Lonsdale, S. J., Losito, S., Macina, D., Mallik, A., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mingrone, F., Milazzo, P. M., Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rauscher, T., Reifarth, R., Riego, A., Robles, M. S., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sedyshev, P., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Woods, P. J., Wright, T., Žugec, P., and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Subjects: Nuclear reaction, Astrofísica, Astrophysics and Astronomy, Cross-section, nTOF, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 01 natural sciences, 7. Clean energy, n_TOF, nuclear astrophysics, CERN, Nuclear physics, Physics and Astronomy (all), Stellar nucleosynthesis, Big Bang nucleosynthesis, Nucleosynthesis, 0103 physical sciences, CERN, Nuclear astrophysics, Astrophysics::Solar and Stellar Astrophysics, Nuclear Physics - Experiment, Neutron induced nuclear reactions, 010306 general physics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Neutron capture, 13. Climate action, Neutron source, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Nucleosíntesi
Abstract: An important experimental program on Nuclear Astrophysics is being carried out at the n_TOF since several years, in order to address the still open issues in stellar and primordial nucleosynthesis. Several neutron capture reactions relevant to s-process nucleosynthesis have been measured so far, some of which on important branching point radioisotopes. Furthermore, the construction of a second experimental area has recently opened the way to challenging measurements of (n, charged particle) reactions on isotopes of short half-life. The Nuclear Astrophysics program of the n_TOF Collaboration is here described, with emphasis on recent results relevant for stellar nucleosynthesis, stellar neutron sources and primordial nucleosynthesis., We acknowledge the support by the Narodowe Centrum Nauki (NCN), under the Grant No. UMO-2012/04/M/ST2/00700.
Published: 2018

29. The $^{154}$Gd neutron capture cross section measured at the n_TOF facility and its astrophysical implications

Author: F. Ogállar, G. Tagliente, D. Ramos Doval, Z. Eleme, M. Sabaté-Gilarte, Ignacio Porras, A. Casanovas, B. Fernández-Domíngez, A. Oprea, O. Aberle, M. A. Millán-Callado, A. Musumarra, L. Caballero, A. Pavlik, J. Lerendegui-Marco, C. Domingo-Pardo, A. Masi, S. Amaducci, A. S. Brown, R. Vlastou, D. G. Jenkins, E. Berthoumieux, V. Variale, Dimitri Rochman, Rugard Dressler, L. Cosentino, A. Gawlik, Kathrin Göbel, Arnd R. Junghans, A. Kimura, J. Andrzejewski, P. Torres-Sánchez, Claudia Lederer-Woods, E. Dupont, Rene Reifarth, I. Duran, Jan Heyse, Y. Kopatch, S. Bennett, M. A. Cortés-Giraldo, N. V. Sosnin, M. Mastromarco, I. Knapova, F. Cerutti, A. Stamatopoulos, J. M. Quesada, Y. Kadi, V. Vlachoudis, P. Vaz, Massimo Barbagallo, Annamaria Mazzone, L. Tassan-Got, Petar Žugec, A. Tsinganis, Diego Vescovi, Maurizio Busso, Sergio Cristallo, P. Sprung, B. Thomas, F. Mingrone, Anton Wallner, P. M. Milazzo, Simone Gilardoni, Alberto Ventura, Deniz Kurtulgil, Luciano Piersanti, Ariel Tarifeño-Saldivia, S. J. Lonsdale, L. A. Damone, V. Alcayne, U. Jiri, S. Valenta, Nicola Colonna, D. Cano-Ott, E. González-Romero, D. Bosnar, E. Pirovano, V. Michalopoulou, A. Sekhar, M. Diakaki, Marco Calviani, L. Audouin, E. Mendoza, Javier Praena, A. G. Smith, M. Krtička, M. Dietz, Peter Schillebeeckx, E. Jericha, V. Babiano-Suarez, S. Heinitz, F. Calviño, T. Martinez, Paolo Finocchiaro, C. Petrone, J. L. Tain, V. Furman, J. Perkowski, T. J. Wright, Dorothea Schumann, F. Gunsing, Cristian Massimi, E. Chiaveri, J. Moreno-Soto, P. F. Mastinu, S. Urlass, I. Ferro-Gonçalves, C. Rubbia, A. Mengoni, Q. Ducasse, A. Manna, D. Macina, Carlos Guerrero, R. Garg, M. Bacak, Alexandru Negret, F. Käppeler, P. J. Woods, N. Patronis, A. K. Saxena, Arnaud Ferrari, I. Ladarescu, G. Vannini, Emilio Andrea Maugeri, M. Kokkoris, M. Caamaño, P. J. Davies, G. Cortes, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Physics, Isotope, 010308 nuclear & particles physics, QC1-999, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutron temperature, Nuclear physics, Samarium, Neutron capture, Stellar nucleosynthesis, chemistry, n_TOF, 154Gd, neutron capture, neutron time of flight, 0103 physical sciences, Neutron cross section, Nuclear Physics - Experiment, Neutron, Decay chain, Nuclear Experiment, 010303 astronomy & astrophysics
Abstract: The (n, γ) cross sections of the gadolinium isotopes play an important role in the study of the stellar nucleosynthesis. In particular, among the isotopes heavier than Fe, 154Gd together with 152Gd have the peculiarity to be mainly produced by the slow capture process, the so-called s-process, since they are shielded against the β-decay chains from the r-process region by their stable samarium isobars. Such a quasi pure s-process origin makes them crucial for testing the robustness of stellar models in galactic chemical evolution (GCE). According to recent models, the 154Gd and 152Gd abundances are expected to be 15-20% lower than the reference un-branched s-process 150Sm isotope. The close correlation between stellar abundances and neutron capture cross sections prompted for an accurate measurement of 154Gd cross section in order to reduce the uncertainty attributable to nuclear physics input and eventually rule out one of the possible causes of present discrepancies between observation and model predictions. To this end, the neutron capture cross section of 154Gd was measured in a wide neutron energy range (from thermal up to some keV) with high resolution in the first experimental area of the neutron time-of-flight facility n_TOF (EAR1) at CERN. In this contribution, after a brief description of the motivation and of the experimental setup used in the measurement, the preliminary results of the 154Gd neutron capture reaction as well as their astrophysical implications are presented.
Published: 2019

30. Neutron capture cross section measurements of $^{241}$Am at the n_TOF facility

Author: A. Manna, Ralf Nolte, Alexandru Negret, F. Becčvář, F. Käppeler, M. Bacak, A. Kimura, Rene Reifarth, G. Vannini, Y. H. Chen, L. A. Damone, F. Gunsing, T. Glodariu, A. Oprea, O. Aberle, J. L. Tain, T. Talip, Emilio Andrea Maugeri, M. Caamaño, L. Cosentino, M. Kokkoris, Cristian Massimi, L. Audouin, Claudia Lederer-Woods, V. Michalopoulou, P. Vaz, Rugard Dressler, E. Jericha, J. M. Quesada, F. Cerutti, L. Tassan-Got, Alberto Ventura, G. Cortes, Niko Kivel, Francesca Matteucci, A. Tsinganis, Paolo Finocchiaro, I. Duran, V. Alcayne, P. J. Woods, F. Calviño, J. Andrzejewski, Nicola Colonna, D. Bosnar, J. Perkowski, Dorothea Schumann, V. Furman, T. J. Wright, Deniz Kurtulgil, E. Mendoza, J. Ulrich, A. Masi, M. Krtička, Sergio Cristallo, J. Lerendegui-Marco, S. Amaducci, Y. Kopatch, Vasilis Vlachoudis, N. Patronis, A. K. Saxena, Peter Schillebeeckx, T. Martinez, D. G. Jenkins, Arnaud Ferrari, N. V. Sosnin, Kathrin Göbel, C. Rubbia, I. Ladarescu, A. Stamatopoulos, I. F. Gonçalves, G. Bellia, F. Ogállar, Simone Gilardoni, Jan Heyse, J. Billowes, Annamaria Mazzone, P. Torres-Sánchez, Z. Eleme, E. Chiaveri, D. Cano-Ott, M. Diakaki, P. F. Mastinu, Petar Žugec, B. Femandez-Domínguez, A. Pavlik, V. Bécares, C. Domingo-Pardo, Hideo Harada, G. Tagliente, M. A. Cortés-Giraldo, B. Geslot, A. Musumarra, E. Dupont, L. Caballero-Ontanaya, M. Mastromarco, D. Macina, A. Casanovas, D. Ramos-Doval, Carlos Guerrero, Y. Kadi, Massimo Barbagallo, R. Garg, A. Gawlik, S. Valenta, A. S. Brown, Marco Calviani, A. G. Smith, Javier Praena, S. Lo Meo, M. Dietz, Anton Wallner, P. M. Milazzo, Maurizio Busso, R. Vlastou, D. Radeck, L. Persanti, E. Berthoumieux, S. Urlass, M. Sabaté-Gilarte, E. González-Romero, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Ignacio Porras, A. Mengoni, S. Heinitz, V. Variale, Dimitri Rochman, F. Mingrone, V. Babiano-Suarez, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), n_TOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Physics, Large Hadron Collider, 010308 nuclear & particles physics, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Time of flight, Cross section (physics), Neutron capture, Cascade, 0103 physical sciences, Neutron cross section, Nuclear Physics - Experiment, Neutron, 010306 general physics, Nuclear Experiment, Energy (signal processing), n_TOF, 241Am, neutron capture, neutron time of flight
Abstract: Neutron capture on 241Am plays an important role in the nuclear energy production and also provides valuable information for the improvement of nuclear models and the statistical interpretation of the nuclear properties. A new experiment to measure the 241Am(n, γ) cross section in the thermal region and the first few resonances below 10 eV has been carried out at EAR2 of the n_TOF facility at CERN. Three neutron-insensitive C6D6 detectors have been used to measure the neutron-capture gamma cascade as a function of the neutron time of flight, and then deduce the neutron capture yield. Preliminary results will be presented and compared with previously obtained results at the same facility in EAR1. In EAR1 the gamma-ray background at thermal energies was about 90% of the signal while in EAR2 is up to a 25 factor much more favorable signal to noise ratio. We also extended the low energy limit down to subthermal energies. This measurement will allow a comparison with neutron capture measurements conducted at reactors and using a different experimental technique.
Published: 2019

31. Measurement of the energy-differential cross-section of the $^{12}$C(n,p)$^{12}$B and $^{12}$C(n,d)$^{11}$B reactions at the n_TOF facility at CERN

Author: Kathrin Göbel, P. J. Woods, N. Patronis, A. K. Saxena, Jan Heyse, Arnaud Ferrari, O. Aberle, I. Ladarescu, M. A. Millán-Callado, Diego Vescovi, I. Duran, J. Lerendegui-Marco, S. Amaducci, Y. Kadi, M. Sabaté Gilarte, N. V. Sosnin, F. Ogállar, A. Kimura, Emilio Andrea Maugeri, M. Kokkoris, D. Cano-Ott, A. Sekhar, M. Diakaki, Rugard Dressler, I. Ferro-Gonçalves, J. Moreno-Soto, F. Calviño, J. Perkowski, M. Krtička, Claudia Lederer-Woods, Annamaria Mazzone, Petar Žugec, Simone Gilardoni, G. Tagliente, D. Ramos Doval, G. Vannini, A. Musumarra, Alexandru Negret, F. Käppeler, B. Fernández-Domíngez, A. Tsinganis, Luciano Piersanti, T. Martinez, L. A. Damone, P. Sprung, U. Jiri, A. Oprea, Nicola Colonna, V. Michalopoulou, L. Caballero, E. Mendoza, Deniz Kurtulgil, M. Mastromarco, M. Caamaño, V. Babiano-Suarez, J. Andrzejewski, Peter Schillebeeckx, V. Variale, S. Valenta, Dimitri Rochman, Arnd R. Junghans, Massimo Barbagallo, M. Bacak, A. Casanovas, F. Cerutti, V. Vlachoudis, Anton Wallner, M. A. Cortés-Giraldo, Rene Reifarth, Marco Calviani, P. J. Davies, A. Manna, E. Pirovano, G. Cortes, L. Cosentino, A. G. Smith, M. Dietz, J. M. Quesada, L. Tassan-Got, F. Mingrone, Sergio Cristallo, E. Chiaveri, Javier Praena, P. F. Mastinu, S. Urlass, C. Rubbia, V. Furman, T. J. Wright, A. Masi, S. Heinitz, P. Torres-Sánchez, R. Vlastou, C. Petrone, Q. Ducasse, E. Berthoumieux, D. G. Jenkins, D. Bosnar, S. Bennett, A. Stamatopoulos, Z. Eleme, D. Macina, Carlos Guerrero, R. Garg, J. L. Tain, A. Pavlik, C. Domingo-Pardo, L. Audouin, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, A. S. Brown, P. M. Milazzo, Y. Kopatch, F. Gunsing, E. Dupont, I. Knapova, Cristian Massimi, P. Vaz, B. Thomas, V. Alcayne, Alberto Ventura, Maurizio Busso, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Ignacio Porras, A. Mengoni, A. Gawlik, E. González-Romero, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Scattering cross-section, Nuclear reaction, Large Hadron Collider, Silicon, 010308 nuclear & particles physics, QC1-999, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Neutron temperature, Nuclear physics, chemistry, 0103 physical sciences, Nuclear Physics - Experiment, Graphite, 010306 general physics, n_TOF, 12C(n, p), 12C(n, d), neutron time of flight, Energy (signal processing)
Abstract: Although the 12C(n,p)12B and 12C(n,d)11B reactions are of interest in several fields of basic and applied Nuclear Physics the present knowledge of these two cross-sections is far from being accurate and reliable, with both evaluations and data showing sizable discrepancies. As part of the challenging n_TOF program on (n,cp) nuclear reactions study, the energy differential cross-sections of the 12C(n,p)12B and 12C(n,d)11 B reactions have been measured at CERN from the reaction thresholds up to 30 MeV neutron energy. Both measurements have been recently performed at the long flight-path (185 m) experimental area of the n_TOF facility at CERN using a pure (99.95%) rigid graphite target and two silicon telescopes. In this paper an overview of the experiment is presented together with a few preliminary results.
Published: 2019

32. Measurement of the $$^{244}$$ 244 Cm and $$^{246}$$ 246 Cm Neutron-Induced Cross Sections at the n_TOF Facility

Author: B. Fernández-Domíngez, A. Oprea, Rugard Dressler, C. Rubbia, A. Tsinganis, A. Stamatopoulos, Luciano Piersanti, Nicola Colonna, Rene Reifarth, N. V. Sosnin, A. Pavlik, Vasilis Vlachoudis, F. Gunsing, Annamaria Mazzone, Petar Žugec, D. Cano-Ott, C. Domingo-Pardo, M. Diakaki, J. M. Quesada, A. Mengoni, T. Rausher, L. Tassan-Got, Cristian Massimi, Luis Caballero, G. Cortes, V. Babiano-Suarez, Sergio Cristallo, Z. Eleme, I. Ferro-Gon calves, M. A. Cortés-Giraldo, Kathrin Göbel, A. Musumarra, Y. Kadi, F. Bečvář, A. Kimura, M. Bacak, Y. Kopatch, E. Mendoza, Paolo Finocchiaro, Dorothea Schumann, Jan Heyse, J. Andrzejewski, J. Ulrich, S. Valenta, E. Chiaveri, L. Cosentino, A. Manna, T. Glodariu, Javier Praena, S. Lo Meo, V. Furman, T. J. Wright, Marco Calviani, Peter Schillebeeckx, V. Alcayne, Emilio Andrea Maugeri, P. F. Mastinu, A. G. Smith, M. Dietz, J. L. Tain, Alexandru Negret, M. Kokkoris, D. Bosnar, R. Vlastou, D. Radeck, E. Berthoumieux, L. Audouin, V. Michalopoulou, F. Käppeler, E. Dupont, I. Duran, A. S. Brown, V. Bécares, P. J. Woods, G. Bellia, F. Ogállar, V. Variale, Dimitri Rochman, F. Mingrone, F. Cerutti, G. Tagliente, P. M. Milazzo, F. Calviño, Z. Talip, N. Patronis, A. K. Saxena, D. Ramos Doval, Arnaud Ferrari, A. Gawlik, M. Krtička, J. Perkowski, I. Ladarescu, J. Billowes, A. Masi, D. G. Jenkins, A. Casanovas, E. González-Romero, Y. H. Chen, M. Mastromarco, T. Martinez, P. Vaz, Massimo Barbagallo, Anton Wallner, Simone Gilardoni, Ralf Nolte, Alberto Ventura, M. Sabaté-Gilarte, L. A. Damone, S. Heinitz, G. Vannini, Niko Kivel, M. Caamaño, J. Lerendegui-Marco, S. Amaducci, D. Macina, Carlos Guerrero, Ignacio Porras, Claudia Lederer-Woods, Maurizio Busso, Deniz Kurtulgil, Ariel Tarifeño-Saldivia, S. J. Lonsdale, S. Urlass, Francesca Matteucci, and O. Aberle
Subjects: Materials science, Isotope, Nuclear transmutation, 010308 nuclear & particles physics, Neutron emission, 020209 energy, Analytical chemistry, 02 engineering and technology, Actinide, 7. Clean energy, 01 natural sciences, Neutron capture, 13. Climate action, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Neutron cross section, Neutron, Absorption (logic)
Abstract: The neutron capture reactions of the $^{244}$Cm and $^{246}$Cm isotopes open the path for the formation of heavier Cm isotopes and of heavier elements such as Bk and Cf in a nuclear reactor. In addition, both isotopes belong to the minor actinides with a large contribution to the decay heat and to the neutron emission in irradiated fuels proposed for the transmutation of nuclear waste and fast critical reactors. The available experimental data for both isotopes are very scarce. We measured the neutron capture cross section with isotopically enriched samples of $^{244}$Cm and $^{246}$Cm provided by JAEA. The measurement covers the range from 1 eV to 250 eV in the n_TOF Experimental Area 2 (EAR-2). In addition, a normalization measurement with the $^{244}$Cm sample was performed at Experimental Area 1 (EAR-1) with the Total Absorption Calorimeter (TAC).
Published: 2019

33. An alternative methodology for high counting-loss corrections in neutron time-of-flight measurements

Author: A. Kalamara, R. Vlastou, M. Sabaté-Gilarte, A. Stamatopoulos, Petar Žugec, M. Diakaki, A. Tsinganis, Nicola Colonna, F. Gunsing, L. Tassan-Got, M. Kokkoris, N. Patronis, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), n_TOF, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Nuclear and High Energy Physics, Neutron time of flight, Dead-time, Nuclear engineering, Pulse reconstruction, 01 natural sciences, Lead (geology), 0103 physical sciences, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, Instrumentation, Pile-up, Physics, Data collection, 010308 nuclear & particles physics, fungi, food and beverages, n_TOF facility, NATURAL SCIENCES. Physics, Detector emulation, PRIRODNE ZNANOSTI. Fizika, Time of flight, Dead-time, Pile-up, n_TOF facility, Neutron time of flight, Detector emulation, Pulse reconstruction, Waiting time distribution, Waiting time distribution
Abstract: International audience; In counting experiments associated with pulsed sources, a high data collection rate can lead to considerably large counting losses, especially in the case of spallation Time-of-Flight facilities equipped with medium and short flight paths where the research interest is focused on higher neutron energies where counting losses can be quite large due to the higher neutron flux, the more compressed time frame compared to the one on lower energies and the higher cross-section depending on the reaction. Examples of such measurements are the neutron induced fission experiments at the new experimental area EAR-2 at the n_TOF facility at CERN. Although analytical expressions to account for this inefficiency exist in literature, the introduced corrections are not always sufficient to retrieve the true reaction rate, therefore a different approach is mandatory. This work explores the possibility to quantify the counting losses using detector emulation devices and exponential fits in waiting time distributions. The methodology is benchmarked in the test case of the standard 238U(n,f) cross-section with reference to 235U(n,f) for bandwidths up to 1.9 MHz and counting losses that exceed 60%.
Published: 2019

34. Fission program at n_TOF

Author: A. Musumarra, E. Dupont, J. Lerendegui-Marco, S. Amaducci, M. A. Cortés-Giraldo, I. Ferro-Gonçalves, J. Moreno-Soto, B. Fernández-Domíngez, A. Oprea, A. Kimura, T. Martinez, A. Mengoni, Z. Eleme, M. Bacak, J. Andrzejewski, Emilio Andrea Maugeri, D. Cano-Ott, A. Sekhar, M. Diakaki, A. Pavlik, M. Kokkoris, Alexandru Negret, Diego Vescovi, Kathrin Göbel, C. Domingo-Pardo, I. Duran, C. Rubbia, F. Käppeler, L. Caballero, M. Sabaté-Gilarte, Simone Gilardoni, V. Variale, Dimitri Rochman, Arnd R. Junghans, Rugard Dressler, Jan Heyse, G. Cortes, Maurizio Busso, A. Masi, A. Gawlik, Y. Kopatch, V. Babiano-Suarez, Q. Ducasse, Ariel Tarifeño-Saldivia, S. J. Lonsdale, D. G. Jenkins, L. Cosentino, A. Tsinganis, Luciano Piersanti, Nicola Colonna, Ignacio Porras, Vasilis Vlachoudis, J. L. Tain, E. Chiaveri, U. Jiri, P. F. Mastinu, V. Furman, T. J. Wright, B. Thomas, D. Bosnar, Y. Kadi, Rene Reifarth, G. Vannini, V. Alcayne, E. González-Romero, L. A. Damone, O. Aberle, D. Macina, M. Caamaño, Carlos Guerrero, N. V. Sosnin, A. Manna, M. A. Millán-Callado, Javier Praena, R. Garg, M. Krticˇka, Annamaria Mazzone, Petar Žugec, S. Valenta, F. Ogállar, P. J. Davies, F. Mingrone, S. Bennett, G. Tagliente, P. Sprung, Marco Calviani, D. Ramos Doval, A. Stamatopoulos, J. M. Quesada, F. Gunsing, L. Tassan-Got, P. Torres-Sánchez, A. G. Smith, S. Urlass, M. Mastromarco, M. Dietz, A. Casanovas, Cristian Massimi, F. Cerutti, Sergio Cristallo, Massimo Barbagallo, Claudia Lederer-Woods, Anton Wallner, E. Pirovano, Deniz Kurtulgil, I. Knapova, S. Heinitz, P. Vaz, C. Petrone, R. Vlastou, E. Berthoumieux, F. Calviño, J. Perkowski, Alberto Ventura, P. J. Woods, N. Patronis, A. K. Saxena, Arnaud Ferrari, I. Ladarescu, L. Audouin, V. Michalopoulou, E. Mendoza, Peter Schillebeeckx, A. S. Brown, P. M. Milazzo, Paolo Finocchiaro, Dorothea Schumann, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Nuclear i de les Radiacions Ionitzants, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris-Sud - Paris 11 (UP11), Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear reaction, Fission, QC1-999, Nuclear Theory, Nuclear physics, 01 natural sciences, Plutonium-240, 0103 physical sciences, Plutonium-242, CERN, Neutron, n_TOF, Neutron captures, n_TOF, Fission, r-process, 010306 general physics, Nuclear Experiment, Physics, [PHYS]Physics [physics], Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], Cross section, Neutron captures, 010308 nuclear & particles physics, r-process, Neutron radiation, Neutron capture, n_TOF, fission program, cross section measurements, Física nuclear, Other
Abstract: Since its start in 2001 the n_TOF collaboration developed a measurement program on fission, in view of advanced fuels in new generation reactors. A special effort was made on measurement of cross sections of actinides, exploiting the peculiarity of the n_TOF neutron beam which spans a huge energy domain, from the thermal region up to GeV. Moreover fission fragment angular distributions have also been measured. An overview of the cross section results achieved with different detectors is presented, including a discussion of the 237Np case where discrepancies showed up between different detector systems. The results on the anisotropy of the fission fragments and its implication on the mechanism of neutron absorption, and in applications, are also shown.
Published: 2019

35. Study of the photon strength functions and level density in the gamma decay of the n + $^{234}U$ reaction

Author: J. Moreno-Soto, W Dridi, L. Persanti, G. Cortes, S. Urlass, A. Musumarra, J. Andrzejewski, O Litaize, A. Kimura, Javier Praena, M. Bacak, S. Valenta, O. Aberle, A. Oprea, Diego Vescovi, Marco Calviani, Maurizio Busso, A. G. Smith, D. Macina, Carlos Guerrero, A Chebboubi, V. Variale, Dimitri Rochman, Arnd R. Junghans, M. Dietz, S. Heinitz, G. Vannini, Ariel Tarifeño-Saldivia, S. J. Lonsdale, A. Gawlik, C. Petrone, Thomas Rauscher, L. A. Damone, E. Chiaveri, Rugard Dressler, P. F. Mastinu, A. Pavlik, F. Cerutti, M. Sabaté-Gilarte, N. V. Sosnin, C. Domingo-Pardo, Annamaria Mazzone, L. Caballero-Ontanaya, A. Tsinganis, M. Caamaño, Claudia Lederer-Woods, S. Bennett, I. Duran, F. Gunsing, M. Krtiˇcka, E. González-Romero, Petar Žugec, O. Serot, P. Sprung, A. Stamatopoulos, Nicola Colonna, Ignacio Porras, Deniz Kurtulgil, A. Mengoni, Kathrin Göbel, E. Dupont, Vasilis Vlachoudis, P. J. Davies, Simone Gilardoni, D. Ramos-Doval, Cristian Massimi, Z. Eleme, Y. Kadi, S. Simone, M. Mastromarco, V. Alcayne, Massimo Barbagallo, E. Pirovano, Jan Heyse, Anton Wallner, D. Cano-Ott, A. Sekhar, M. Diakaki, T. Martinez, J. Ulrich, R. Vlastou, E. Berthoumieux, Y. Kopatch, V. Furman, T. J. Wright, F. Mingrone, I. F. Gonçalves, I. Knapova, F. Calviño, P. Vaz, J. Perkowski, M. A. Cortés-Giraldo, L. Audouin, Alberto Ventura, D. Bosnar, Th. Benedikt, Alexandru Negret, B. Fernández-Domínguez, F. Käppeler, V. Babiano-Suarez, L. Cosentino, A. Manna, F. Ogállar, A. Masi, D. G. Jenkins, G. Tagliente, A. Casanovas, Paolo Finocchiaro, Dorothea Schumann, A. S. Brown, V. Bécares, P. M. Milazzo, Rene Reifarth, J. M. Quesada, L. Tassan-Got, Sergio Cristallo, V. Michalopoulou, E. Mendoza, Peter Schillebeeckx, Emilio Andrea Maugeri, M. Kokkoris, P. J. Woods, N. Patronis, A. K. Saxena, Arnaud Ferrari, I. Ladarescu, J. Billowes, Q. Ducasse, J. L. Tain, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Saclay, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11), n_TOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Serot, O., and Chebboubi, A.
Subjects: neutron captures, Physics, [PHYS]Physics [physics], Photon, Large Hadron Collider, actinides, 010308 nuclear & particles physics, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Radiative capture, Gamma ray, neutron captures, n_TOF, actinides, Actinide, n_TOF, photon strengts, level density, 234U, 01 natural sciences, Spectral line, Nuclear physics, 13. Climate action, 0103 physical sciences, n_TOF, Other, Multiplicity (chemistry), 010306 general physics, Nuclear Experiment
Abstract: The accurate calculations of neutron-induced reaction cross sections are relevant for many nuclear applications. The photon strength functions and nuclear level densities are essential inputs for such calculations. These quantities for 235U are studied using the measurement of the gamma de-excitation cascades in radiative capture on 234U with the Total Absorption Calorimeter at n_TOF at CERN. This segmented 4π gamma calorimeter is designed to detect gamma rays emitted from the nucleus with high efficiency. This experiment provides information on gamma multiplicity and gamma spectra that can be compared with numerical simulations. The code diceboxc is used to simulate the gamma cascades while geant4 is used for the simulation of the interaction of these gammas with the TAC materials. Available models and their parameters are being tested using the present data. Some preliminary results of this ongoing study are presented and discussed.
Published: 2018

36. The 33S(n,α)30Si cross section measurement at n TOF-EAR2 (CERN): From 0.01 eV to the resonance region

Author: A. Pavlik, C. Domingo-Pardo, P. Kavrigin, R. Cardella, G. Tagliente, E. Mendoza, Ralf Nolte, E. Griesmayer, V. Bécares, F. Bečvář, C. Wolf, L. A. Damone, A. Casanovas, E. Leal-Cidoncha, Hideo Harada, S. Heinitz, M. Sabaté-Gilarte, M. Diakaki, P. Vaz, C. Rubbia, G. Cortes, L. Cosentino, Alberto Ventura, A. Gawlik, Peter Schillebeeckx, P. C. Rout, F. Cerutti, I. Duran, Ignacio Porras, Thomas Rauscher, A. Oprea, C. Lederer, A. Kimura, N. Patronis, A. K. Saxena, S. Valenta, Arnaud Ferrari, A. García-Rios, Rene Reifarth, F. Gunsing, Marco Calviani, P. M. Milazzo, M. A. Cortés-Giraldo, M. Mastromarco, Stefan Schmidt, J. Billowes, S. Montesano, V. Khryachkov, A. G. Smith, J. L. Tain, K. Rajeev, D. Cano-Ott, J. Balibrea-Correa, M. Bacak, Philip Woods, Mario Barbagallo, Anton Wallner, Emilio Andrea Maugeri, J. M. Quesada, L. Tassan-Got, Javier Praena, S. Lo Meo, M. Kokkoris, Francesca Matteucci, E. Jericha, A. Stamatopoulos, M. Krtička, Paolo Finocchiaro, K. Gödel, G. Vannini, S. Warren, J. Lerendegui-Marco, Dorothea Schumann, J. A. Ryan, Niko Kivel, A. Goverdovski, C. Weiss, V. Variale, Cristian Massimi, T. Glodariu, F. Mingrone, Roberto Losito, Damir Bosnar, J. Andrzejewski, Y. Kadi, Rugard Dressler, I. F. Gonçalves, A. Tsinganis, A. Musumarra, M. Mirea, M. Camaño, T. Martinez, Nicola Colonna, F. Calviño, H. Leeb, Tanja Heftrich, J. Perkowski, Vasilis Vlachoudis, A. Riego-Perez, Tatsuya Katabuchi, A. Tarifeño-Saldivia, O. Aberle, S. Barros, M. Brugger, J. Marganiec, S. J. Lonsdale, D. G. Jenkins, C. Beinrucker, A. Mengoni, V. Ketlerov, E. Chiaveri, P. F. Mastinu, Y. H. Chen, R. Vlastou, E. Berthoumieux, B. Fernández-Domínguez, F. Käppeler, V. Furman, T. J. Wright, Petar Žugec, E. González, E. Dupont, D. M. Castelluccio, D. Macina, Carlos Guerrero, Jan Heyse, P. V. Sedyshev, Pedro G. Ferreira, Mario Weigand, L. Audouin, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mengoni, A., Lo Meo, S., Sabaté-Gilarte, M., Praena, J., Porras, I., Quesada, J.M., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Camaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Gödel, K., García-Rios, A., Gawlik, A., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P., Rubbia, C., Ryan, J.A., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., and Ž Ugec, P.
Subjects: Nuclear reaction, nTOF, Neutron therapy, QC1-999, chemistry.chemical_element, Neutron, 01 natural sciences, Resonance (particle physics), Nuclear physics, Cross section (physics), Physics and Astronomy (all), 0103 physical sciences, CERN, ddc:530, 010306 general physics, Boron, Physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Range (particle radiation), Large Hadron Collider, cross section, Reaccions nuclears, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Neutron capture, chemistry, Nuclear reactions
Abstract: The 33S(n,α)30Si cross section measurement, using 10B(n,α) as reference, at the n TOF Experimental Area 2 (EAR2) facility at CERN is presented. Data from 0.01 eV to 100 keV are provided and, for the first time, the cross section is measured in the range from 0.01 eV to 10 keV. These data may be used for a future evaluation of the cross section because present evaluations exhibit large discrepancies. The 33S(n,α)30Si reaction is of interest in medical physics because of its possible use as a cooperative target to boron in Neutron Capture Therapy (NCT)., This work has been partially supported by the projects of Junta de Andalucía (P07-FQM-02894, FQM-220, P11-FQM-8229), Ministerio de Ciencia y Tecnología (FPA2011-28770-C03-02), CEI-Biotic Granada (P-BS-64), Mineco (FPA2013-47327-C2- 1-R, FPA2014-53290-C2-2-P, FIS2015-69941-C2-1-P) and the funding agencies of the participating institutes.
Published: 2017
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37. The n_TOF facility: Neutron beams for challenging future measurements at CERN

Author: A. Kalamara, J. Marganiec, L. Cosentino, J. Lerendegui-Marco, Emilio Andrea Maugeri, M. Kokkoris, F. Bečvář, N. Patronis, T. J. Wright, A. K. Saxena, D. Cano-Ott, Arnaud Ferrari, Alberto Mengoni, A. Kimura, J. Billowes, I. F. Gonçalves, E. Chiaveri, A. Casanovas, M. Bacak, P. F. Mastinu, Peter Schillebeeckx, G. Vannini, Pedro G. Ferreira, Ignacio Porras, Simone Gilardoni, T. Glodariu, Mario Barbagallo, A. Musumarra, A. Pavlik, P. Kavrigin, Ralf Nolte, Hideo Harada, Kathrin Göbel, A. S. Brown, D. Macina, Carlos Guerrero, M. Sabaté-Gilarte, C. Domingo-Pardo, M. A. Cortés-Giraldo, Alexandru Negret, B. Fernández-Domínguez, F. Käppeler, R. Cardella, E. Griesmayer, G. Tagliente, Jan Heyse, M. Caamaño, M. Diakaki, E. Mendoza, L. A. Damone, F. Calviño, H. Leeb, Y. H. Chen, R. Vlastou, D. Radeck, Rugard Dressler, Ariel Tarifeño-Saldivia, S. J. Lonsdale, O. Aberle, P. M. Milazzo, J. Perkowski, F. Cerutti, E. Berthoumieux, A. Tsinganis, M. Mastromarco, L. Audouin, F. Gunsing, Nicola Colonna, G. Cortes, I. Duran, Deniz Kurtulgil, Vasilis Vlachoudis, Anton Wallner, S. Heinitz, Cristian Massimi, E. Jericha, J. Balibrea, P. Vaz, Paolo Finocchiaro, M. Krtička, A. Oprea, Javier Praena, S. Lo Meo, Dorothea Schumann, A. Stamatopoulos, T. Martinez, N. V. Sosnin, Rene Reifarth, Alberto Ventura, E. Dupont, J. A. Ryan, E. Leal-Cidoncha, Annamaria Mazzone, Petar Žugec, A. Gawlik, Thomas Rauscher, A. Masi, D. G. Jenkins, J. M. Quesada, L. Tassan-Got, E. González, S. Warren, V. Variale, A. R. García, F. Mingrone, C. Lederer, J. Andrzejewski, Damir Bosnar, Y. Kadi, J. L. Tain, S. Valenta, Marco Calviani, Niko Kivel, A. G. Smith, Philip Woods, C. Rubbia, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Chiaveri, E., Aberle, O., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Bečvář, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y.H., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Göbel, K., García, A.R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E.A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Rauscher, T., Reifarth, R., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Woods, P.J., Wright, T., Ugec, P., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Astrofísica, nTOF, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], QC1-999, Nuclear Theory, Neutron, Astrophysics, 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, Physics and Astronomy (all), Neutron flux, law, 0103 physical sciences, CERN, Nuclear astrophysics, Spallation, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Nuclear data, Nuclear reactor, Neutron radiation, Accelerators and Storage Rings, 3. Good health, 13. Climate action
Abstract: The CERN n TOF neutron beam facility is characterized by a very high instantaneous neutron flux, excellent TOF resolution at the 185 m long flight path (EAR-1), low intrinsic background and coverage of a wide range of neutron energies, from thermal to a few GeV. These characteristics provide a unique possibility to perform high-accuracy measurements of neutron-induced reaction cross-sections and angular distributions of interest for fundamental and applied Nuclear Physics. Since 2001, the n TOF Collaboration has collected a wealth of high quality nuclear data relevant for nuclear astrophysics, nuclear reactor technology, nuclear medicine, etc. The overall efficiency of the experimental program and the range of possible measurements has been expanded with the construction of a second experimental area (EAR-2), located 20 m on the vertical of the n TOF spallation target. This upgrade, which benefits from a neutron flux 30 times higher than in EAR- 1, provides a substantial extension in measurement capabilities, opening the possibility to collect data on neutron cross-section of isotopes with short half-lives or available in very small amounts. This contribution will outline the main characteristics of the n TOF facility, with special emphasis on the new experimental area. In particular, we will discuss the innovative features of the EAR-2 neutron beam that make possible to perform very challenging measurements on short-lived radioisotopes or sub-mg samples, out of reach up to now at other neutron facilities around the world. Finally, the future perspectives of the facility will be presented.
Published: 2017

38. High-accuracy determination of the neutron flux in the new experimental area n_TOF-EAR2 at CERN

Author: D. Cano-Ott, A. Pavlik, C. Domingo-Pardo, P. Vaz, Alberto Ventura, G. Vannini, Y. H. Chen, F. Bečvář, M. Caamaño, G. Tagliente, C. Wolf, M. Licata, Peter Schillebeeckx, J. Billowes, V. Bécares, O. Aberle, A. Villacorta, R. J. W. Frost, M. S. Robles, F. Belloni, J. Andrzejewski, M. Bacak, D. G. Jenkins, M. Sabaté-Gilarte, V. Ketlerov, E. Jericha, R. Baccomi, F. R. Palomo-Pinto, E. González, F. Cerutti, M. Diakaki, Paolo Finocchiaro, K. Rajeev, Dorothea Schumann, Francesca Matteucci, Luigi Cosentino, M. A. Cortés-Giraldo, C. Weiss, J. I. Porras, T. Glodariu, Roberto Losito, J. A. Ryan, B. Fernández-Domínguez, A. R. García, F. Käppeler, A. Oprea, Y. Kadi, C. Rubbia, M. Brugger, J. Lerendegui-Marco, N. Patronis, C. Beinrucker, A. K. Saxena, R. Cardella, Hideo Harada, M. Mastromarco, I. F. Gonçalves, E. Leal-Cidoncha, Arnaud Ferrari, V. Khryachkov, A. Gawlik, Anton Wallner, Thomas Rauscher, Rugard Dressler, P. M. Milazzo, J. L. Tain, Javier Praena, S. Lo Meo, J. Balibrea, Niko Kivel, P. Kavrigin, A. Tsinganis, Ralf Nolte, A. Casanovas, M. Piscopo, Nicola Colonna, E. Griesmayer, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Krtička, Emilio Andrea Maugeri, Vasilis Vlachoudis, Tatsuya Katabuchi, S. Valenta, Alberto Mengoni, T. Martinez, Marco Calviani, T. Papaevangelou, M. Kokkoris, S. Barros, A. G. Smith, I. Duran, Philip Woods, A. Hernández-Prieto, L. A. Damone, Rene Reifarth, J. Marganiec, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, E. Chiaveri, G. Cortés, P. F. Mastinu, S. Warren, V. Variale, P. V. Sedyshev, A. Musumarra, K. Deo, D. M. Castelluccio, Tanja Heftrich, A. Riego-Perez, D. Macina, Carlos Guerrero, C. Paradela, S. Heinitz, L. Audouin, Kathrin Göbel, Jan Heyse, V. Furman, T. J. Wright, E. Mendoza, R. Vlastou, E. Berthoumieux, Petar Žugec, A. Kimura, Mario Barbagallo, S. V. Suryanarayana, A. Goverdovski, M. Mirea, F. Calviño, H. Leeb, J. Perkowski, Pedro G. Ferreira, Mario Weigand, F. Gunsing, Cristian Massimi, E. Dupont, Ioana Gheorghe, S. Montesano, A. Stamatopoulos, P. C. Rout, F. Mingrone, C. Lederer, D. Bosnar, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Sabaté-Gilarte, M., Barbagallo, M., Colonna, N., Gunsing, F., Žugec, P., Vlachoudis, V., Chen, Y. H., Stamatopoulos, A., Lerendegui-Marco, J., Cortés-Giraldo, M. A., Villacorta, A., Guerrero, C., Damone, L., Audouin, L., Berthoumieux, E., Cosentino, L., Diakaki, M., Finocchiaro, P., Musumarra, A., Papaevangelou, T., Piscopo, M., Tassan-Got, L., Aberle, O., Andrzejewski, J., Bécares, V., Bacak, M., Baccomi, R., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chiaveri, E., Cortés, G., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Frost, R. J. W., Furman, V., Göbel, K., García, A. R., Gawlik, A., Gheorghe, I., Glodariu, T., Gonçalves, I. F., González, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Licata, M., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Nolte, R., Oprea, A., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M. S., Rout, P. C., Rubbia, C., Ryan, J. A., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wolf, C., Woods, P. J., Weiss, C., Wright, T., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
Subjects: Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Flux, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, n-tof, Neutron flux, 0103 physical sciences, CERN, Spallation, 010306 general physics, Nuclear Experiment, n_TOF, EAR2, neutron flux measurement, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Neutron radiation, Neutron temperature, Radiation flux, Physics::Accelerator Physics, Beam (structure)
Abstract: A new high flux experimental area has recently become operational at the n_TOF facility at CERN. This new measuring station, n_TOF-EAR2, is placed at the end of a vertical beam line at a distance of approximately 20m from the spallation target. The characterization of the neutron beam, in terms of flux, spatial profile and resolution function, is of crucial importance for the feasibility study and data analysis of all measurements to be performed in the new area. In this paper, the measurement of the neutron flux, performed with different solid-state and gaseous detection systems, and using three neutron-converting reactions considered standard in different energy regions is reported. The results of the various measurements have been combined, yielding an evaluated neutron energy distribution in a wide energy range, from 2meV to 100MeV, with an accuracy ranging from 2%, at low energy, to 6% in the high-energy region. In addition, an absolute normalization of the n_TOF-EAR2 neutron flux has been obtained by means of an activation measurement performed with 197Au foils in the beam. © 2017, SIF, Springer-Verlag GmbH Germany.
Published: 2017

39. Measurement of the 241Am neutron capture cross section at the n-TOF facility at CERN

Author: C. Carrapiço, Tanja Heftrich, Rene Reifarth, I. Duran, M. S. Robles, A. Mengoni, M. P. W. Chin, V. Ketlerov, F. Roman, Javier Praena, E. Leal-Cidoncha, M. Mastromarco, Anton Wallner, Srinivasan Ganesan, J. Balibrea, Mario Barbagallo, F. Mingrone, J. Andrzejewski, C. Paradela, L. Audouin, A. Riego-Perez, M. Diakaki, D. Cano-Ott, P. Gurusamy, E. González, F. Käppeler, Jeri Kroll, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, C. Domingo-Pardo, G. Vannini, Stefan Schmidt, A. Goverdovski, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, Iris Dillmann, A. Hernández-Prieto, A. K. Saxena, Arnaud Ferrari, A. R. García, M. Brugger, L. S. Leong, Jan Heyse, M. Sabaté-Gilarte, A. Manousos, Mario Weigand, J. Billowes, G. Tagliente, F. Cerutti, F. Gunsing, M. Krtička, Tatsuya Katabuchi, P. E. Koehler, M. Fernandez-Ordonez, Cristian Massimi, P. V. Sedyshev, M. Licata, G. Giubrone, A. J. M. Plompen, F. Bečvář, T. Martinez, V. Khryachkov, Roberto Losito, T. Ware, P. M. Milazzo, F. Gramegna, M. Kokkoris, C. Weiss, E. Griesmayer, G. Cortes, E. Mendoza, D. Tarrío, J. Marganiec, S. Andriamonje, M. Mirea, Peter Schillebeeckx, Carlos Guerrero, V. Furman, T. J. Wright, N. Dzysiuk, M. A. Cortés-Giraldo, E. Chiaveri, S. Heinitz, F. Calviño, P. F. Mastinu, H. Leeb, J. Perkowski, C. Rubbia, V. Bécares, Petar Žugec, K. Fraval, S. Altstadt, M. B. Gómez-Hornillos, Christoph Langer, C. Lampoudis, A. Pavlik, A. Tsinganis, J. L. Tain, Nicola Colonna, E. Jericha, Vasilis Vlachoudis, Ariel Tarifeño-Saldivia, Dorothea Schumann, J. A. Ryan, R. Sarmento, R. Vlastou, J. Lerendegui-Marco, P. Vaz, E. Berthoumieux, Alberto Ventura, I. F. Gonçalves, D. G. Jenkins, Fabio Belloni, W. Mondelaers, V. Variale, Roberto Versaci, C. Lederer, Damir Bosnar, Y. Kadi, M. J. Vermeulen, B. Berthier, S. Valenta, Marco Calviani, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), n_TOF, Mengoni, A., Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mendoza, E., Cano-Ott, D., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., Balibrea, J., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthier, B., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Dillmann, I., Domingo-Pardo, C., Durán, I., Dzysiuk, N., Eleftheriadis, C., Fernández-Ordóñez, M., Ferrari, A., Fraval, K., Furman, V., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Koehler, P., Kokkoris, M., Kroll, J., Krtička, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Licata, M., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A.J.M., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Roman, F., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Versaci, R., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and Ž Ugec, P.
Subjects: Nuclear reaction, Nuclear transmutation, nTOF, QC1-999, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Physics and Astronomy (all), Cross section (physics), Nuclear reactors, Reactors nuclears, 0103 physical sciences, CERN, Neutron cross section, Nuclear Physics - Experiment, ddc:530, 010306 general physics, Absorption (electromagnetic radiation), Physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Large Hadron Collider, Cross section, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Calorimeter
Abstract: New neutron cross section measurements of minor actinides have been performed recently in order to reduce the uncertainties in the evaluated data, which is important for the design of advanced nuclear reactors and, in particular, for determining their performance in the transmutation of nuclear waste. We have measured the 241 Am(n,γ) cross section at the n TOF facility between 0.2 eV and 10 keV with a BaF2 Total Absorption Calorimeter, and the analysis of the measurement has been recently concluded. Our results are in reasonable agreement below 20 eV with the ones published by C. Lampoudis et al. in 2013, who reported a 22% larger capture cross section up to 110 eV compared to experimental and evaluated data published before. Our results also indicate that the 241 Am(n,γ) cross section is underestimated in the present evaluated libraries between 20 eV and 2 keV by 25%, on average, and up to 35% for certain evaluations and energy ranges. Plan Nacional I+D+I FPA2014-53290-C2-1 Comisión Europea, ANDES FP7- 249671 Comisión Europea, CHANDA FP7-605203
Published: 2017

40. Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α, n)25Mg

Author: D. Tarrío, C. Paradela, A. Manousos, Rene Reifarth, J. Marganiec, P. Schillebeeckx, M. A. Cortés-Giraldo, P. F. Mastinu, S. Valenta, Marco Calviani, Marco Pignatari, F. Mingrone, J. Andrzejewski, Srinivasan Ganesan, Alfredo Ferrari, M. Mastromarco, Petar Žugec, Carlo Rubbia, A. Mallick, J. M. Quesada, L. Tassan-Got, J. L. Tain, C. Lampoudis, F. Cerutti, G. Vannini, A. Tsinganis, Mario Barbagallo, C. Carrapiço, Sergio Cristallo, Anton Wallner, D. Schumann, R. Vlastou, P. Vaz, J. Billowes, Nicola Colonna, L.S. Leong, M. Krtička, F. Calviño, A. R. García, S. Altstadt, E. Jericha, Damir Bosnar, Y. Kadi, Vasilis Vlachoudis, Christoph Langer, T. Martinez, N. Kivel, Paolo Finocchiaro, D. M. Castelluccio, P. E. Koehler, A. J. M. Plompen, Alberto Ventura, M. S. Robles, R. Losito, C. Weiß, T. Wright, M. Brugger, Javier Praena, S. Lo Meo, V. Bécares, I. Van Rijs, M. Weigand, M. J. Vermeulen, F. Belloni, G. Tagliente, Alberto Mengoni, A. Musumarra, Stefan Kopecky, P. M. Milazzo, D. G. Jenkins, M. Kokkoris, K. Fraval, A. Hernández-Prieto, M. Diakaki, Luigi Cosentino, G. Giubrone, E. Leal-Cidoncha, F. Bečvář, C. Eleftheriadis, Giulia Clai, F. Käppeler, E. Chiaveri, I. Duran, D. Cano-Ott, I. F. Gonçalves, Thomas Rauscher, A. K. Saxena, R. Dressler, R. Wynants, A. Pavlik, T. Ware, A. Riego, C. Domingo-Pardo, E. Griesmayer, M. Sabaté-Gilarte, D. Karadimos, L. Audouin, Carlos Guerrero, C. Lederer, E. González-Romero, M. P. W. Chin, Jeri Kroll, R. Sarmento, S. Schmidt, M. Mirea, L. Piersanti, E. Berthoumieux, W. Mondelaers, V. Variale, E. Mendoza, S. Bisterzo, H. Leeb, J. Perkowski, F. Gunsing, Cristian Massimi, G. Cortes, ITA, GBR, FRA, DEU, ESP, AUS, AUT, BEL, JPN, GRC, IND, CZE, CHE, Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bisterzo, S., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Castelluccio, D.M., Cerutti, F., Chiaveri, E., Cosentino, L., Chin, M., Clai, G., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Kopecky, S., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Piersanti, L., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Van Rijs, I., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wynants, R., Wright, T., Žugec, P., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, n_TOF, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Capture, nucl-ex, Proce, 01 natural sciences, Espectroscòpia atòmica, Stellar nucleosynthesis, CERN, Neutron spectroscopy, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 010303 astronomy & astrophysics, Physics, Cross section, s Process, α+22Ne, lcsh:QC1-999, Neutron temperature, PRIRODNE ZNANOSTI. Fizika, Atomic spectroscopy, Excited state, Atomic physics, s Process, α+22Ne, Neutron spectroscopy, Nuclear and High Energy Physics, nTOF, Neutron, [formula omitted]Ne, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Neutron spectroscopy, s Process, α+22Ne, Nuclear and High Energy Physics, Nuclear physics, Experimental, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Nuclear Physics - Experiment, Spin (physics), α+22 Ne, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, NATURAL SCIENCES. Physics, Neutron source, Neutron spectroscopy, s Process, α+22Ne, α+Ne, s-process, lcsh:Physics
Abstract: This work reports on accurate, high-resolution measurements of the $^{25}$Mg($n, \gamma$)$^{26}$Mg and $^{25}$Mg($n, tot$) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved $^{25}$Mg($n, \gamma$)$^{26}$Mg parametrization. The relevant resonances for $n+^{25}$Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in $^{26}$Mg. With this information experimental upper limits of the reaction rates for $^{22}$Ne($\alpha, n$)$^{25}$Mg and $^{22}$Ne($\alpha, \gamma$)$^{26}$Mg were established, potentially leading to a significantly higher ($\alpha, n$)/($\alpha, \gamma$) ratio than previously evaluated. The impact of these results have been studied for stellar models in the mass range 2 to 25 $M_{\odot}$., Comment: Preprint, 6 pages, 5 figures
Published: 2017

41. Measurement of the neutron capture cross section of the fissile isotope 235U with the CERN n-TOF total absorption calorimeter and a fission tagging based on micromegas detectors

Author: E. Jericha, Dorothea Schumann, J. A. Ryan, C. Paradela, G. Cortes, M. Mastromarco, V. Khryachkov, Rugard Dressler, P. M. Milazzo, M. A. Cortés-Giraldo, D. Tarrío, Rene Reifarth, A. Goverdovski, L. Audouin, C. Rubbia, J. Balibrea-Correa, A. Tsinganis, M. S. Robles, Nicola Colonna, Anton Wallner, Stefan Schmidt, Javier Praena, P. V. Sedyshev, Vasilis Vlachoudis, Jeri Kroll, S. Altstadt, G. Tagliente, P. E. Koehler, Srinivasan Ganesan, M. B. Gómez-Hornillos, Christoph Langer, K. Fraval, Petar Žugec, Mario Weigand, M. Diakaki, A. Mallick, J. M. Quesada, D. Cano-Ott, V. Bécares, G. Vannini, L. Tassan-Got, E. Mendoza, A. J. M. Plompen, G. Giubrone, C. Carrapiço, L. S. Leong, Mario Barbagallo, Carlos Guerrero, M. Krtička, A. Manousos, J. L. Tain, S. Heinitz, C. Weiss, F. Mingrone, J. Andrzejewski, V. Boccone, F. Bečvář, F. Cerutti, Niko Kivel, I. Duran, M. Sabaté-Gilarte, C. Lederer, C. Lampoudis, Roberto Losito, M. Licata, T. Martinez, A. Pavlik, Peter Schillebeeckx, C. Domingo-Pardo, Kathrin Göbel, J. Marganiec, M. Mirea, J. Lerendegui-Marco, Tatsuya Katabuchi, E. Chiaveri, P. F. Mastinu, F. Käppeler, Jan Heyse, R. Sarmento, D. G. Jenkins, P. Vaz, R. Vlastou, F. Calviño, H. Leeb, A. Hernández-Prieto, Alberto Ventura, E. Berthoumieux, J. Perkowski, F. Gunsing, I. F. Gonçalves, Cristian Massimi, W. Mondelaers, E. González, V. Furman, T. J. Wright, V. Variale, Tanja Heftrich, A. Riego-Perez, Fabio Belloni, M. Kokkoris, A. K. Saxena, Arnaud Ferrari, J. Billowes, Ariel Tarifeño-Saldivia, S. Valenta, Marco Calviani, M. J. Vermeulen, E. Leal-Cidoncha, C. Eleftheriadis, Damir Bosnar, Thomas Rauscher, Y. Kadi, D. Karadimos, T. Ware, E. Griesmayer, A. R. García, M. Brugger, A. Mengoni, M. P. W. Chin, V. Ketlerov, Mengoni, A., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Balibrea-Correa, J., Mendoza, E., Cano-Ott, D., Krtička, M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Guerrero, C., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Gunsing, F., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Licata, M., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A.J.M., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., Žugec, P., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
Subjects: Nuclear reaction, nTOF, Fission, Physics::Instrumentation and Detectors, QC1-999, Nuclear Theory, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), 0103 physical sciences, CERN, Neutron cross section, ddc:530, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment, Physics, Neutrons, Radioisotopes, Isòtops radioactius, Calorimeter (particle physics), Fissile material, cross section, 010308 nuclear & particles physics, Nuclear data, MicroMegas detector
Abstract: The accuracy on neutron capture cross section of fissile isotopes must be improved for the design of future nuclear systems such as Gen-IV reactors and Accelerator Driven Systems. The High Priority Request List of the Nuclear Energy Agency, which lists the most important nuclear data requirements, includes also the neutron capture cross sections of fissile isotopes such as 233,235U and 239,241Pu. A specific experimental setup has been used at the CERN n TOF facility for the measurement of the neutron capture cross section of 235U by a set of micromegas fission detectors placed inside a segmented BaF2 Total Absorption Calorimeter. Plan Nacional de I+D+I Física de particulas FPA2014-53290-C2-1
Published: 2017

42. Characterization of the n-TOF EAR-2 neutron beam

Author: M. Sabaté-Gilarte, Enrique Casarejos, F. Gunsing, A. Musumarra, Cristian Massimi, A. Pavlik, P. Ferreira, C. Domingo-Pardo, P. M. Milazzo, N. Kivel, M. Krtička, R. Nolte, G. Tagliente, M. A. Cortés-Giraldo, Ariel Tarifeño-Saldivia, S. J. Lonsdale, P. C. Rout, M. Caamaño, F. Cerutti, Alfredo Ferrari, R. Cardella, T. Martinez, Javier Praena, S. Lo Meo, K. Göbel, C. Lederer, G. Vannini, S. Warren, A. Kimura, Tatsuya Katabuchi, E. Leal-Cidoncha, Tanja Heftrich, F. Mingrone, J. Andrzejewski, Mario Weigand, V. Variale, J. Marganiec, O. Aberle, T. Wright, E. Chiaveri, D. Cano-Ott, D. Macina, J. L. Tain, Carlo Rubbia, E. González, V. Vlachoudis, S. Barros, A. Gawlik, M. Kokkoris, J. I. Porras, Thomas Rauscher, Rene Reifarth, D. M. Castelluccio, A. Riego-Perez, J. Lerendegui-Marco, Stefan Schmidt, Mario Barbagallo, P. F. Mastinu, V. Khryachkov, M. Mirea, D. Schumann, P. Vaz, L. Cosentino, J. M. Quesada, C. Le Naour, L. Tassan-Got, Alberto Ventura, I. F. Gonçalves, M. Bacak, D. G. Jenkins, F. Käppeler, E. Mendoza, V. Bécares, F. Calviño, H. Leeb, A. Oprea, G. Cortes, A. Casanovas, J. Perkowski, S. Montesano, Y. H. Chen, J. Heyse, A. R. García, M. B. Gómez-Hornillos, B. Fernández-Domínguez, S. Heinitz, N. Patronis, Carlos Guerrero, M. Brugger, I. Duran, S. Valenta, Marco Calviani, A. Stamatopoulos, C. Beinrucker, A. Saxena, E. Jericha, C. Wolf, A. G. Smith, Roberto Losito, T. Glodariu, Paolo Finocchiaro, K. Rajeev, Philip Woods, Alberto Mengoni, J. A. Ryan, P. Schillebeeckx, Francesca Matteucci, V. Ketlerov, C. Weiss, R. Vlastou, A. Goverdovski, R. Dressler, A. Tsinganis, Damir Bosnar, Y. Kadi, P. Kavrigin, P. V. Sedyshev, F. Bečvář, Nicola Colonna, Hideo Harada, E. Dupont, J. Billowes, E. Griesmayer, M. Mastromarco, L. A. Damone, M. S. Robles, Anton Wallner, E. A. Maugeri, J. Balibrea, L. Audouin, M. Diakaki, E. Berthoumieux, V. Furman, Petar Žugec, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Gobierno de España, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Chen, Y.H., Tassan-Got, L., Audouin, L., Le Naour, C., Durán, I., Casarejos, E., Aberle, O., Andrzejewski, J., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., Gómez-Hornillos, M.B., García, A.R., Gawlik, A., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, J.I., Praena, J., Quesada, J.M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rout, P.C., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., Ugec, P., and Lo Meo, S.
Subjects: nTOF, QC1-999, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Neutron, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), CERN, 0103 physical sciences, ddc:530, 010306 general physics, Neutrons, Physics, Flux, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Beam, Neutron radiation, Accelerators and Storage Rings, Parallel plate, Characterization (materials science), Beam (structure)
Abstract: The experimental area 2 (EAR-2) at CERNs neutron time-of-flight facility (n TOF), which is operational since 2014, is designed and built as a short-distance complement to the experimental area 1 (EAR-1). The Parallel Plate Avalanche Counter (PPAC) monitor experiment was performed to characterize the beam profile and the shape of the neutron flux at EAR-2. The prompt γ-flash which is used for calibrating the time-of-flight at EAR-1 is not seen by PPAC at EAR-2, shedding light on the physical origin of this γ-flash., The USC group contribution has been partly supported by Spanish grant FPA2013-46236-P.
Published: 2017
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43. 7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n-TOF facility at CERN

Author: M. Mirea, J. Marganiec, F. Calviño, H. Leeb, V. Bécares, J. Perkowski, Petar Žugec, P. F. Mastinu, A. Musumarra, D. G. Jenkins, Tanja Heftrich, F. Gunsing, P. Vaz, V. Furman, Y. H. Chen, Tatsuya Katabuchi, A. Riego-Perez, L. Cosentino, Cristian Massimi, S. Heinitz, A. Casanovas, E. A. Maugeri, Alberto Ventura, A. Saxena, Ariel Tarifeño-Saldivia, S. J. Lonsdale, S. Barros, G. Vannini, C. Wolf, J. Lerendegui-Marco, O. Aberle, F. Käppeler, A. Tsinganis, E. Berthoumieux, M. Krtička, I. F. Gonçalves, A. Kimura, Alfredo Ferrari, Mario Weigand, J. Billowes, N. Kivel, T. Martinez, Nicola Colonna, E. Dupont, M. A. Cortés-Giraldo, A. Stamatopoulos, E. Chiaveri, G. Cortes, D. Cano-Ott, Rene Reifarth, V. Khryachkov, E. González, Alberto Mengoni, P. Ferreira, Stefan Schmidt, Mario Barbagallo, D. Schumann, J. I. Porras, J. M. Quesada, L. Tassan-Got, F. Bečvář, R. Cardella, A. Pavlik, G. Tagliente, C. Domingo-Pardo, K. Rajeev, B. Fernández-Domínguez, Francesca Matteucci, E. Jericha, T. Glodariu, Paolo Finocchiaro, J. L. Tain, P. Schillebeeckx, M. Bacak, J. A. Ryan, M. Caamaño, M. Diakaki, F. Cerutti, Roberto Losito, P. V. Sedyshev, L. Audouin, A. Oprea, J. Heyse, Hideo Harada, D. M. Castelluccio, M. Mastromarco, Javier Praena, S. Lo Meo, Carlos Guerrero, Anton Wallner, S. Montesano, J. Balibrea, S. Warren, M. Sabaté-Gilarte, V. Variale, R. Nolte, A. Goverdovski, E. Leal-Cidoncha, A. Gawlik, Thomas Rauscher, P. C. Rout, C. Lederer, S. Valenta, F. Mingrone, J. Andrzejewski, Marco Calviani, Carlo Rubbia, V. Vlachoudis, A. G. Smith, V. Ketlerov, Philip Woods, P. M. Milazzo, C. Weiss, R. Vlastou, A. R. García, Damir Bosnar, Y. Kadi, M. Brugger, K. Göbel, C. Beinrucker, T. Wright, M. Kokkoris, N. Patronis, I. Duran, R. Dressler, P. Kavrigin, E. Griesmayer, L. A. Damone, E. Mendoza, D. Macina, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Mengoni, A., Lo Meo, S., Castelluccio, D. M., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Barbagallo, M., Colonna, N., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A.R., Gawlik, A., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, J.I., Praena, J., Quesada, J.M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P.C., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., and Ugec, P.
Subjects: Astrofísica, nTOF, QC1-999, chemistry.chemical_element, Neutron, Astrophysics, 01 natural sciences, 7. Clean energy, Nuclear physics, Physics and Astronomy (all), Big Bang nucleosynthesis, Nucleosynthesis, CERN, 0103 physical sciences, Nuclear astrophysics, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Physics, Alpha, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Stars, chemistry, Lithium, Halo, Nucleosíntesi
Abstract: One of the most puzzling problems in Nuclear Astrophysics is the “Cosmological Lithium Problem”, i.e the discrepancy between the primordial abundance of $^{7}$Li observed in metal poor halo stars (Asplund et al. in Astrophys J 644:229–259, 2006, [1]), and the one predicted by Big Bang Nucleosynthesis (BBN). One of the reactions that could have an impact on the problem is $^{7}$Be(n,p)$^{7}$Li. Despite of the importance of this reaction in BBN, the cross-section has never been directly measured at the energies of interest for BBN. Taking advantage of the innovative features of the second experimental area at the n$\_$TOF facility at CERN (Sabate-Gilarte et al. in Eur Phys J A 53:210, 2017, [2]; Weiss et al. in NIMA 799:90, 2015, [3]), an accurate measurement of $^{7}$Be(n,p) cross section has been recently performed at n$\_$TOF, with a pure $^{7}$Be target produced by implantation of a $^{7}$Be beam at ISOLDE. The mesurement started in April 2016 and lasted for two months. The experimental procedure, the setup used in the measurement and the results obtained so far will be here presented.
Published: 2017

44. Time-of-flight and activation experiments on 147Pm and 171Tm for astrophysics

Author: E. Leal-Cidoncha, P. M. Milazzo, M. Mastromarco, Rene Reifarth, O. Aberle, Simone Gilardoni, A. Gawlik, J. M. Quesada-Molina, Thomas Rauscher, D. Radeck, Michael Paul, J. Marganiec, R. Cardella, E. Berthoumieux, Javier Praena, S. Lo Meo, Leonid Weissman, M. Diakaki, M. Kokkoris, A. S. Brown, L. Tassan-Got, Anton Wallner, M. Caamaño, F. Cerutti, M. Tessler, L. Cosentino, J. Balibrea, S. Valenta, G. Cortes, A. Stamatopoulos, Deniz Kurtulgil, A. Oprea, N. V. Sosnin, J. Heyse, Marco Calviani, F. Mingrone, J. Andrzejewski, A. G. Smith, A. Kimura, D. Macina, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. L. Tain, A. Saxena, A. R. García, F. Gunsing, N. Patronis, Annamaria Mazzone, Petar Žugec, M. Bacak, I. Duran, P. Schillebeeckx, Philip Woods, S. Halfon, A. Casanovas, P. F. Mastinu, Ulli Köster, J. Lerendegui-Marco, P. Ferreira, Hideo Harada, Alfredo Ferrari, Mario Barbagallo, S. Warren, R. Dressler, Cristian Massimi, V. Variale, A. Kalamara, C. Weiss, D. Schumann, R. Vlastou, G. Tagliente, P. Kavrigin, I. F. Gonçalves, M. Sabaté-Gilarte, P. C. Rout, E. Mendoza, Y. H. Chen, Alexandru Negret, E. Griesmayer, R. Nolte, L. A. Damone, S. Heinitz, F. Becvar, A. Tsinganis, C. Lederer, A. Masi, E. Jericha, T. Glodariu, Paolo Finocchiaro, Damir Bosnar, Y. Kadi, F. Käppeler, J. A. Ryan, D. G. Jenkins, E. A. Maugeri, K. Göbel, N. Kivel, Ignacio Porras, Nicola Colonna, E. Dupont, G. Vannini, T. Wright, M. Krtička, E. González, M. A. Cortés-Giraldo, B. Fernández-Domínguez, T. Martinez, F. Calviño, L. Audouin, H. Leeb, Alberto Mengoni, J. Perkowski, Carlo Rubbia, V. Vlachoudis, Carlos Guerrero, P. Vaz, Alberto Ventura, A. Musumarra, E. Chiaveri, D. Cano-Ott, A. Pavlik, C. Domingo-Pardo, J. Billowes, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Vannini, G., Mengoni, A., Lo Meo, S., Guerrero, C., Lerendegui-Marco, J., Domingo-Pardo, C., Casanovas, A., Dressler, R., Halfon, S., Heinitz, S., Kivel, N., Köster, U., Paul, M., Quesada-Molina, J.M., Schumann, D., Tarifeño-Saldivia, A., Tessler, M., Weissman, L., Aberle, O., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Becvar, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Göbel, K., García, A.R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González, E., Griesmayer, E., Gunsing, F., Harada, H., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Meo, S. Lo, Lonsdale, S.J., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E.A., Mazzone, A., Mendoza, E., Milazzo, P.M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Radeck, D., Rauscher, T., Reifarth, R., Rout, P.C., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Woods, P.J., Wright, T., Ugec, P., and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Subjects: QC1-999, Neutron, Scintillator, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), Stellar nucleosynthesis, Nucleosynthesis, 0103 physical sciences, Neutron cross section, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Isotope, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Tof, Time of flight, Neutron capture, 13. Climate action, Nucleosíntesi
Abstract: The neutron capture cross section of several key unstable isotopes acting as branching points in the s-process are crucial for stellar nucleosynthesis studies, but they are very challenging to measure due to the difficult production of sufficient sample material, the high activity of the resulting samples, and the actual (n,γ ) measurement, for which high neutron fluxes and effective background rejection capabilities are required. As part of a new program to measure some of these important branching points, radioactive targets of 147Pm and 171Tm have been produced by irradiation of stable isotopes at the ILL high flux reactor. Neutron capture on 146Nd and 170Er at the reactor was followed by beta decay and the resulting matrix was purified via radiochemical separation at PSI. The radioactive targets have been used for time-of-flight measurements at the CERN n TOF facility using the 19 and 185m beam lines during 2014 and 2015. The capture cascades were detected using a set of four C6D6 scintillators, allowing to observe the associated neutron capture resonances. The results presented in this work are the first ever determination of the resonance capture cross section of 147Pm and 171Tm. Activation experiments on the same 147Pm and 171Tm targets with a high-intensity 30 keV quasi-Maxwellian flux of neutrons will be performed using the SARAF accelerator and the Liquid-Lithium Target (LiLiT) in order to extract the corresponding Maxwellian Average Cross Section (MACS). The status of these experiments and preliminary results will be presented and discussed as well., The authors acknowledge financial support by Spanish FPA2013-45083-P and FPA2014-53290-C2-2-P projects and the EC FP7 projects NeutAndalus (Grant No. 334315) and CHANDA (Grant No. 605203).
Published: 2017

45. Nuclear data activities at the n_TOF facility at CERN

Author: Rene Reifarth, Stefan Schmidt, D. Radeck, J. M. Quesada, E. Berthoumieux, A. R. García, S. Montesano, P. Vaz, Rugard Dressler, I. Porras, G. Vannini, M. Brugger, P. C. Rout, Emilio Andrea Maugeri, A. Casanovas, A. Goverdovski, M. Caamaño, Alberto Ventura, C. Rubbia, C. Lederer, C. Beinrucker, M. Kokkoris, J. Balibrea-Correa, A. Tsinganis, F. Gunsing, M. Licata, M. Krtička, Nicola Colonna, Cristian Massimi, V. Furman, T. J. Wright, Tatsuya Katabuchi, A. Oprea, G. Cortes, D. Tarrío, Annamaria Mazzone, Petar Žugec, K. Deo, T. Martinez, V. Ketlerov, S. Warren, S. Barros, A. Kimura, D. Cano-Ott, Srinivasan Ganesan, K. Rajeev, J. Marganiec, J. L. Tain, V. Variale, R. J. W. Frost, V. Khryachkov, Francesca Matteucci, D. G. Jenkins, P. Kavrigin, M. Mirea, E. Mendoza, N. Patronis, E. Leal-Cidoncha, Niko Kivel, E. Chiaveri, Laurent Tassan-Got, F. R. Palomo-Pinto, E. Jericha, Hideo Harada, A. Pavlik, Ralf Nolte, Kathrin Göbel, C. Domingo-Pardo, A. K. Saxena, Arnaud Ferrari, A. Hernández-Prieto, P. F. Mastinu, J. Billowes, Mario Barbagallo, A. Gawlik, E. Griesmayer, Thomas Rauscher, F. Calviño, H. Leeb, L. A. Damone, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, M. Mastromarco, S. Heinitz, Jan Heyse, M. S. Robles, A. Stamatopoulos, M. A. Cortés-Giraldo, Anton Wallner, I. F. Gonçalves, J. Perkowski, C. Paradela, M. Bacak, Y. H. Chen, M. Diakaki, Ioana Gheorghe, V. Bécares, E. González, I. Duran, Alberto Mengoni, T. Glodariu, Alessandro Masi, Roberto Losito, O. Aberle, P. M. Milazzo, Fabio Belloni, M. Sabaté-Gilarte, F. Bečvář, Pedro G. Ferreira, Mario Weigand, C. Wolf, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Peter Schillebeeckx, Saraswatula Venkata Suryanarayana, J. Lerendegui, E. Dupont, Luigi Cosentino, B. Fernández-Domínguez, F. Käppeler, R. Cardella, F. Mingrone, J. Andrzejewski, V. Vlachoudis, L. Audouin, A. Musumarra, Javier Praena, S. Lo Meo, Tanja Heftrich, A. Riego-Perez, A. G. Smith, F. Cerutti, P. V. Sedyshev, D. M. Castelluccio, D. Macina, Carlos Guerrero, G. Tagliente, C. Weiss, R. Vlastou, Damir Bosnar, Y. Kadi, S. Valenta, Marco Calviani, Philip Woods, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mengoni, A., Lo Meo, S., Castelluccio, D. M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), n_TOF Collaboration, The n_TOF Collaboration, Null, Gunsing, F., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés-Giraldo, M.A., Cortés, G., Cosentino, L., Damone, L.A., Deo, K., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R.J.W., Furman, V., Ganesan, S., García, A.R., Gawlik, A., Gheorghe, I., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Göbel, K., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui, J., Licata, M., Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mazzone, A., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rout, P., Radeck, D., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., Žugec, P., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear reaction, U-235, Nuclear transmutation, nTOF, CAPTURE CROSS-SECTION, Nuclear data, TOTAL ABSORPTION CALORIMETER, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], COLLABORATION, 7. Clean energy, 01 natural sciences, PHYSICS, Nuclear physics, Physics and Astronomy (all), neutron, DESIGN, Radiation dosimetry, 0103 physical sciences, CERN, n_TOF, Nuclear Physics - Experiment, Neutron, 010306 general physics, nuclear data, n_TOF, CERN, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, FRAGMENT ANGULAR-DISTRIBUTION, Large Hadron Collider, ntof, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, cern, Experimental data, Radioactive waste, nuclear data, NATURAL SCIENCES. Physics, Radiació--Dosimetria, PRIRODNE ZNANOSTI. Fizika, Nuclear technology, CAPTURE CROSS-SECTION, TOTAL ABSORPTION CALORIMETER, FRAGMENT ANGULAR-DISTRIBUTION, NEUTRON, TH-232, U-235, C6D6, COLLABORATION, PHYSICS, DESIGN, NEUTRON, TH-232, C6D6
Abstract: International audience; Nuclear data in general, and neutron-induced reaction cross sections in particular, are important for a wide variety of research fields. They play a key role in the safety and criticality assessment of nuclear technology, not only for existing power reactors but also for radiation dosimetry, medical applications, the transmutation of nuclear waste, accelerator-driven systems, fuel cycle investigations and future reactor systems as in Generation IV. Applications of nuclear data are also related to research fields as the study of nuclear level densities and stellar nucleosynthesis. Simulations and calculations of nuclear technology applications largely rely on evaluated nuclear data libraries. The evaluations in these libraries are based both on experimental data and theoretical models. Experimental nuclear reaction data are compiled on a worldwide basis by the international network of Nuclear Reaction Data Centres (NRDC) in the EXFOR database. The EXFOR database forms an important link between nuclear data measurements and the evaluated data libraries. CERN's neutron time-of-flight facility n TOF has produced a considerable amount of experimental data since it has become fully operational with the start of the scientific measurement programme in 2001. While for a long period a single measurement station (EAR1) located at 185 m from the neutron production target was available, the construction of a second beam line at 20 m (EAR2) in 2014 has substantially increased the measurement capabilities of the facility. An outline of the experimental nuclear data activities at CERN's neutron time-of-flight facility n TOF will be presented.
Published: 2016

46. Setup for the measurement of the 235U(n, f) cross section relative to n-p scattering up to 1 GeV

Author: B. Thomas, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, P. Sprung, M. Bacak, V. Alcayne, Ignacio Porras, M. Krtiička, O. Aberle, A. S. Brown, M. A. Millán-Callado, G. Cortes, V. Variale, Dimitri Rochman, E. Pirovano, Arnd R. Junghans, F. Ogállar, A. Mengoni, G. Tagliente, J. Perkowski, M. Sabaté-Gilarte, J. Andrzejewski, J. Lerendegui-Marco, L. Caballero, S. Amaducci, D. Cano-Ott, P. M. Milazzo, I. Duran, A. Sekhar, M. Diakaki, R. Vlastou, E. Berthoumieux, Y. Kopatch, B. Fernández-Domíngez, E. Dupont, F. Mingrone, A. Casanovas, E. Jericha, Rugard Dressler, A. Oprea, D. Macina, Carlos Guerrero, G. Vannini, Paolo Finocchiaro, L. Cosentino, Dorothea Schumann, S. Bennett, P. Torres-Sánchez, A. Tsinganis, I. Knapova, Alexandru Negret, R. Garg, A. Stamatopoulos, M. Caamaño, S. Heinitz, F. Gunsing, M. Mastromarco, Luciano Piersanti, Nicola Colonna, P. Vaz, Massimo Barbagallo, Cristian Massimi, F. Käppeler, Vasilis Vlachoudis, Anton Wallner, Claudia Lederer-Woods, C. Petrone, P. J. Davies, Maurizio Busso, V. Furman, T. J. Wright, V. Michalopoulou, I. Ferro-Gonçalves, Z. Eleme, Deniz Kurtulgil, Ralf Nolte, Fño Calvi, Alberto Ventura, Emilio Andrea Maugeri, V-Suarez Babiano, E. Mendoza, A. Gawlik, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Peter Schillebeeckx, L. A. Damone, M. Kokkoris, S. Urlass, Rene Reifarth, E. González-Romero, A. Pavlik, C. Domingo-Pardo, D. Ramos, A. Manna, P. J. Woods, N. Patronis, A. K. Saxena, Arnaud Ferrari, I. Ladarescu, J. M. Quesada, L. Tassan-Got, D. Bosnar, Sergio Cristallo, S. Valenta, Marco Calviani, A. G. Smith, M. Dietz, J. Moreno-Soto, Y. Kadi, Simone Gilardoni, U. Jiri, F. Cerutti, Javier Praena, A. Kimura, J. L. Tain, M. A. Cortés-Giraldo, A. Musumarra, T. Martinez, C. Rubbia, E. Chiaveri, P. F. Mastinu, A. Masi, Diego Vescovi, D. G. Jenkins, Q. Ducasse, Kathrin Göbel, Jan Heyse, L. Audouin, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.
Subjects: Physics, High energy, Range (particle radiation), 010308 nuclear & particles physics, Scattering, Fission, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Detector, n_TOF, 235U, fission, neutron time of flight, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Cross section (physics), Neutron flux, 0103 physical sciences, Nuclear Physics - Experiment, Neutron, Nuclear Experiment, 010306 general physics
Abstract: The neutron induced fission of 235U is extensively used as a reference for neutron fluence measurements in various applications, ranging from the investigation of the biological effectiveness of high energy neutrons, to the measurement of high energy neutron cross sections of relevance for accelerator driven nuclear systems. Despite its widespread use, no data exist on neutron induced fission of 235U above 200 MeV. The neutron facility n_TOF offers the possibility to improve the situation. The measurement of 235U(n,f) relative to the differential n-p scattering cross-section, was carried out in September 2018 with the aim of providing accurate and precise cross section data in the energy range from 10 MeV up to 1 GeV. In such measurements, Recoil Proton Telescopes (RPTs) are used to measure the neutron flux while the fission events are detected and counted with dedicated detectors. In this paper the measurement campaign and the experimental set-up are illustrated.
Published: 2020

47. The (n,2n) reaction for the lightest stable erbium isotope Er162 from reaction threshold up to 19 MeV

Author: S. M. Vogiatzi, X. Aslanoglou, M. Kokkoris, V. Foteinou, E. Georgali, Sotirios Harissopulos, E. Vagena, N. Patronis, Stylianos Stoulos, G. Provatas, R. Vlastou, A. Lagoyannis, N. G. Nicolis, M. Diakaki, Z. Eleme, M. Axiotis, A. Tsinganis, A. Stamatopoulos, and A. Kalamara
Subjects: Physics, Range (particle radiation), 010308 nuclear & particles physics, Activation technique, Neutron radiation, 01 natural sciences, 7. Clean energy, law.invention, Deuterium, law, 0103 physical sciences, Erbium isotope, Van de Graaff generator, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, 010306 general physics, Energy (signal processing), Beam (structure)
Abstract: The $^{162}\mathrm{Er}(n,2n)^{161}\mathrm{Er}$ reaction cross section (${E}_{th}=9.26\phantom{\rule{0.28em}{0ex}}\mathrm{MeV}$) was measured at six incident neutron beam energies by means of the activation technique. Two energy regions were covered in the present work: the near-threshold energies between 10.7 and 11.3 MeV, as well as the higher energies from 17.1 up to 19.0 MeV. In this way, the energy range from the reaction threshold up to 19 MeV was experimentally mapped, considering also the existing experimental information around 14 MeV. The quasi-monoenergetic neutron beam at near-threshold energies was produced via the $^{2}\mathrm{H}(d,n)^{3}\mathrm{He}$ reaction, while the higher neutron beam energies were achieved by using the $^{3}\mathrm{H}(d,n)^{4}\mathrm{He}$ reaction. The primary deuteron beam was delivered in both cases by the 5.5 MV Tandem Van de Graaff accelerator of NSCR ``Demokritos.'' Statistical model calculations were performed and compared with all the available experimental data.
Published: 2018

48. Be7(n,p)Li7 Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN

Author: Ralf Nolte, E. Griesmayer, L. A. Damone, T. Stora, G. Cortes, J. Lerendegui-Marco, G. Bellia, I. Duran, J. Balibrea-Correa, G. Tagliente, Alexandru Negret, A. Mengoni, I. F. Gonçalves, A. S. Brown, A. Kalamara, Juliana Schell, N. V. Sosnin, Annamaria Mazzone, A. Kimura, Srinivasan Ganesan, A. García-Rios, F. Gunsing, B. Fernández-Domínguez, F. Käppeler, P. J. Woods, Petar Žugec, Rene Reifarth, V. Bécares, S. Heinitz, Cristian Massimi, Ignacio Porras, N. Patronis, A. K. Saxena, Arnaud Ferrari, A. Casanovas, P. M. Milazzo, P. Vaz, Javier Praena, S. Lo Meo, F. Bečvář, Stefan Schmidt, E. Jericha, S. Valenta, M. Bacak, C. Wolf, E. Mendoza, Paolo Finocchiaro, Dorothea Schumann, C. Weiß, Marco Calviani, Cortés-Giraldo, J. M. Quesada, L. Tassan-Got, J. A. Ryan, Peter Schillebeeckx, R. Vlastou, D. Radeck, G. Vannini, A. G. Smith, T.D. Goodacre, M. Mirea, C. Rubbia, A. Stamatopoulos, D. Cano-Ott, A.P. Bernardes, Hideo Harada, M. Brugger, J. Billowes, E. Berthoumieux, M. Mastromarco, M. Diakaki, Sergio Cristallo, C. Seiffert, M. Ayranov, F. Cerutti, D. Bosnar, C. Beinrucker, Massimo Barbagallo, M. Caamaño, E. Leal-Cidoncha, F. Calviño, Simone Gilardoni, T. Glodariu, Roberto Losito, H. Leeb, Maurizio Busso, Anton Wallner, A. Oprea, J. Andrzejewski, A. Gawlik, T. J. Wright, S. Altstadt, R. Cardella, S. Warren, M. Piscopo, Thomas Rauscher, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Y. Kadi, J. Perkowski, Emilio Andrea Maugeri, Rugard Dressler, V. Variale, J. Marganiec, M. Kokkoris, A. Musumarra, A. Dorsival, A. Pavlik, Tatsuya Katabuchi, A. Ventura, Kathrin Göbel, E. González-Romero, A. Masi, A. Tsinganis, Luciano Piersanti, Tanja Heftrich, C. Domingo-Pardo, D. G. Jenkins, A. Riego-Perez, Jan Heyse, Vasilis Vlachoudis, Pedro G. Ferreira, Mario Weigand, M. Sabaté-Gilarte, B. Marsh, L. Audouin, J.G. Martins Correia, P. C. Rout, F. Mingrone, S. Rothe, M. Dietz, L. Cosentino, A. J. M. Plompen, Claudia Lederer-Woods, W.I. Furman, Deniz Kurtulgil, P. V. Sedyshev, E. Dupont, M.J.G. Borge, D. M. Castelluccio, D. Macina, Carlos Guerrero, E. Chiaveri, P. F. Mastinu, K. Rajeev, N. Colonna, Francesca Matteucci, Y. H. Chen, Karl Johnston, M. Krtička, J. Ballof, T. Martinez, O. Aberle, J. L. Tain, U. Kohester, Niko Kivel, R. Catherall, and P. Kavrigin
Subjects: Physics, Range (particle radiation), Large Hadron Collider, 010308 nuclear & particles physics, General Physics and Astronomy, chemistry.chemical_element, 01 natural sciences, Cosmology, Neutron temperature, Nuclear physics, chemistry, Nucleosynthesis, 0103 physical sciences, Neutron, Lithium, Nuclear Experiment, 010306 general physics, Energy (signal processing)
Abstract: We report on the measurement of the $^{7}$Be($n, p$)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n\_TOF facility at CERN. This reaction plays a key role in the lithium yield of the Big Bang Nucleosynthesis (BBN) for standard cosmology. The only two previous time-of-flight measurements performed on this reaction did not cover the energy window of interest for BBN, and showed a large discrepancy between each other. The measurement was performed with a Si-telescope, and a high-purity sample produced by implantation of a $^{7}$Be ion beam at the ISOLDE facility at CERN. While a significantly higher cross section is found at low-energy, relative to current evaluations, in the region of BBN interest the present results are consistent with the values inferred from the time-reversal $^{7}$Li($p, n$)$^{7}$Be reaction, thus yielding only a relatively minor improvement on the so-called Cosmological Lithium Problem (CLiP). The relevance of these results on the near-threshold neutron production in the p+$^{7}$Li reaction is also discussed.
Published: 2018

49. Measurement and resonance analysis of the S33(n,α)Si30 cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV

Author: C. Carrapiço, Tanja Heftrich, G. Cortes, A. Riego-Perez, D. Tarrío, M. S. Robles, Jeri Kroll, Ignacio Porras, M. Mastromarco, J. Lerendegui-Marco, A. Mengoni, M. P. W. Chin, M. B. Gomez-Hornillos, J. Andrzejewski, I. F. Gonçalves, Fabio Belloni, Javier Praena, Massimo Barbagallo, R. Sarmento, V. Ketlerov, Anton Wallner, Ariel Tarifeño-Saldivia, C. Paradela, P. Vaz, D. Cano-Ott, M. A. Cortés-Giraldo, L. Audouin, F. Bečvář, V. Khryachkov, C. Weiss, Srinivasan Ganesan, M. Diakaki, P. M. Milazzo, E. Chiaveri, E. Mendoza, C. Lampoudis, P. F. Mastinu, V. Furman, T. J. Wright, Roberto Losito, A. Pavlik, F. Gunsing, Tatsuya Katabuchi, A. Ventura, Peter Schillebeeckx, C. Domingo-Pardo, Claudia Lederer-Woods, M. Sabaté-Gilarte, Cristian Massimi, Damir Bosnar, A. Manousos, Y. Kadi, V. Bécares, E. Leal-Cidoncha, C. Eleftheriadis, Rene Reifarth, Stefan Schmidt, R. Vlastou, E. Berthoumieux, M. Kokkoris, Thomas Rauscher, J. Marganiec, Vittorio Boccone, J. M. Quesada, D. G. Jenkins, M. Mirea, P. V. Sedyshev, L. Tassan-Got, A. Mallick, G. Vannini, D. Karadimos, Petar Žugec, Willy Mondelaers, F. Calviño, H. Leeb, A. K. Saxena, Christoph Langer, J. Perkowski, A. Hernández-Prieto, Arnaud Ferrari, E. González-Romero, J. Billowes, Mario Weigand, Kathrin Göbel, A. R. García, Rugard Dressler, Jan Heyse, A. Tsinganis, F. Cerutti, M. J. Vermeulen, M. Brugger, Nicola Colonna, E. Jericha, L.S. Leong, S. Valenta, Dorothea Schumann, Vasilis Vlachoudis, J. A. Ryan, Marco Calviani, S. Altstadt, K. Fraval, M. Dietz, Carlos Guerrero, G. Giubrone, G. Tagliente, J. L. Tain, F. Käppeler, Niko Kivel, V. Variale, A. Goverdovski, P. E. Koehler, F. Mingrone, C. Rubbia, I. Duran, M. Krtička, T. Martinez, T. Ware, E. Griesmayer, and A. J. M. Plompen
Subjects: Physics, Nuclear reaction, Large Hadron Collider, 010308 nuclear & particles physics, Resolution (electron density), Resonance, MicroMegas detector, 01 natural sciences, Neutron temperature, Nuclear physics, Cross section (physics), 0103 physical sciences, Neutron, 010306 general physics
Abstract: The 33S(n, α)30Si cross section has been measured at the neutron time-of-flight (n_TOF) facility at CERN in the neutron energy range from 10 to 300 keV relative to the 10B(n, α)7Li cross-section standard. Both reactions were measured simultaneously with a set of micromegas detectors. The flight path of 185 m has allowed us to obtain the cross section with high-energy resolution. An accurate description of the resonances has been performed by means of the multilevel multichannel R-matrix code SAMMY. The results show a significantly higher area of the biggest resonance (13.45 keV) than the unique high-resolution (n, α) measurement. The new parametrization of the 13.45-keV resonance is similar to that of the unique transmission measurement. This resonance is a matter of research in neutron-capture therapy. The 33S(n, α)30Si cross section has been studied in previous works because of its role in the production of 36S in stars, which is currently overproduced in stellar models compared to observations.
Published: 2018

50. Measurement and analysis of theAm241neutron capture cross section at the n_TOF facility at CERN

Author: J. Lerendegui-Marco, Carlos Guerrero, S. Andriamonje, I. Dillmann, Jan Heyse, P. E. Koehler, E. Leal-Cidoncha, C. Eleftheriadis, S. Altstadt, I. F. Gonçalves, E. Chiaveri, P. F. Mastinu, Thomas Rauscher, Fabio Belloni, C. Weiss, G. Tagliente, M. Mirea, S. Heinitz, V. Bécares, D. Karadimos, M. Mastromarco, P. V. Sedyshev, A. Mengoni, M. S. Robles, D. López, Massimo Barbagallo, Roberto Losito, N. Colonna, A. K. Saxena, F. Mingrone, C. Lederer, I. Duran, Tatsuya Katabuchi, A. Ventura, M. P. W. Chin, V. Ketlerov, F. Roman, Srinivasan Ganesan, F. Calviño, H. Leeb, C. Carrapiço, Arnaud Ferrari, C. Paradela, Anton Wallner, Ariel Tarifeño-Saldivia, M. B. Gomez-Hornillos, B. Berthier, F. Cerutti, J. Billowes, P. Gurusamy, L. Audouin, J. Balibrea, A. Goverdovski, M. J. Vermeulen, V. Khryachkov, A. Tsinganis, J. Andrzejewski, Tanja Heftrich, A. Hernández-Prieto, F. Bečvář, E. González, Jeri Kroll, P. Vaz, S. Valenta, J. Perkowski, L.S. Leong, A. Riego-Perez, P. M. Milazzo, D. Cano-Ott, A. R. García, Marco Calviani, T. Ware, Vasilis Vlachoudis, K. Fraval, R. Sarmento, M. Brugger, F. Gramegna, M. Kokkoris, E. Mendoza, E. Griesmayer, A. J. M. Plompen, M. Krtička, M. Diakaki, Javier Praena, F. Käppeler, V. Variale, Peter Schillebeeckx, N. Dzysiuk, Rene Reifarth, T. Martinez, Roberto Versaci, Willy Mondelaers, Christoph Langer, G. Giubrone, Stefan Schmidt, C. Lampoudis, A. Pavlik, Y. Kadi, C. Rubbia, Mario Weigand, A. Manousos, C. Domingo-Pardo, J. M. Quesada, L. Tassan-Got, E. Jericha, J. Marganiec, M. Sabaté-Gilarte, Dorothea Schumann, J. A. Ryan, F. Gunsing, J. L. Tain, D. Bosnar, Cristian Massimi, R. Vlastou, E. Berthoumieux, M. A. Cortés-Giraldo, Petar Žugec, G. Cortes, D. Tarrío, V. Furman, T. J. Wright, G. Vannini, D. G. Jenkins, and M. Licata
Subjects: Nuclear reaction, Physics, 010308 nuclear & particles physics, Resonance, 01 natural sciences, 7. Clean energy, Neutron temperature, Calorimeter, Nuclear physics, Cross section (physics), Neutron capture, 0103 physical sciences, Neutron cross section, Neutron, 010306 general physics
Abstract: The Am241(n,γ) cross section has been measured at the n-TOF facility at CERN with the n-TOF BaF2 Total Absorption Calorimeter in the energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances up to 700 eV, allowing a more detailed description of the cross section than in the current evaluations, which contain resolved resonances only up to 150-160 eV. The cross section in the unresolved resonance region is perfectly consistent with the predictions based on the average resonance parameters deduced from the resolved resonances, thus obtaining a consistent description of the cross section in the full neutron energy range under study. Below 20 eV, our results are in reasonable agreement with JEFF-3.2 as well as with the most recent direct measurements of the resonance integral, and differ up to 20-30% with other experimental data. Between 20 eV and 1 keV, the disagreement with other experimental data and evaluations gradually decreases, in general, with the neutron energy. Above 1 keV, we find compatible results with previously existing values.
Published: 2018

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