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

Author

A. Mazzone, S. Cristallo, O. Aberle, G. Alaerts, V. Alcayne, S. Amaducci, J. Andrzejewski, L. Audouin, V. Babiano-Suarez, M. Bacak, M. Barbagallo, V. Bécares, F. Bečvář, G. Bellia, E. Berthoumieux, J. Billowes, D. Bosnar, A.S. Brown, M. Busso, M. Caamaño, L. Caballero, M. Calviani, F. Calviño, D. Cano-Ott, A. Casanovas, D.M. Castelluccio, F. Cerutti, Y.H. Chen, E. Chiaveri, G. Clai, N. Colonna, G.P. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domíngez, A. Ferrari, I. Ferro-Gonçalves, P. Finocchiaro, V. Furman, R. Garg, A. Gawlik, S. Gilardoni, T. Glodariu, K. Göbel, E. González-Romero, C. Guerrero, F. Gunsing, S. Heinitz, J. Heyse, D.G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, A. Kimura, N. Kivel, M. Kokkoris, Y. Kopatch, S. Kopecky, M. Krtička, D. Kurtulgil, I. Ladarescu, C. Lederer-Woods, J. Lerendegui-Marco, S. Lo Meo, S.-J. Lonsdale, D. Macina, A. Manna, T. Martínez, A. Masi, C. Massimi, P.F. Mastinu, M. Mastromarco, F. Matteucci, E. Maugeri, E. Mendoza, A. Mengoni, V. Michalopoulou, P.M. Milazzo, F. Mingrone, R. Mucciola, A. Musumarra, A. Negret, R. Nolte, F. Ogállar, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, L. Piersanti, I. Porras, J. Praena, J.M. Quesada, D. Radeck, D. Ramos Doval, R. Reifarth, D. Rochman, C. Rubbia, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, A.G. Smith, N. Sosnin, A. Stamatopoulos, G. Tagliente, J.L. Tain, Z. Talip, A.E. Tarifeño-Saldivia, L. Tassan-Got, P. Torres-Sánchez, A. Tsinganis, J. Ulrich, S. Urlass, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, D. Vescovi, V. Vlachoudis, R. Vlastou, A. Wallner, P.J. Woods, R. Wynants, T.J. Wright, and P. Žugec

Subjects
Physics, QC1-999
Abstract

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. Keywords: s process, 154Gd, Neutron time of flight, n_TOF

Published
2020
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2. Results of the 244Cm, 246Cm and 248Cm neutron-induced capture cross sections measurements at EAR1 and EAR2 of the n_TOF facility

Author

V. Alcayne, E. Mendoza, D. Cano-Ott, A. Kimura, O. Aberle, S. Amaducci, J. Andrzejewski, L. Audouin, V. Babiano-Suarez, M. Bacak, M. Barbagallo, V. Bécares, F. Bečvář, G. Bellia, E. Berthoumieux, J. Billowes, D. Bosnar, A. S. Brown, M. Busso, M. Caamaño, L. Caballero, M. Calviani, F. Calviño, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. P. Cortés, M. A. Cortés-Giraldo, L. Cosentino, S. Cristallo, L. A. Damone, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domíngez, A. Ferrari, I. Ferro-Gonçalves, P. Finocchiaro, V. Furman, R. Garg, A. Gawlik, S. Gilardoni, T. Glodariu, K. Göbel, E. González-Romero, C. Guerrero, F. Gunsing, S. Heinitz, J. Heyse, D. G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, N. Kivel, M. Kokkoris, Y. Kopatch, M. Krtička, D. Kurtulgil, I. Ladarescu, C. Lederer-Woods, J. Lerendegui-Marco, S. Lo Meo, S.-J. Lonsdale, D. Macina, A. Manna, T. Martínez, A. Masi, C. Massimi, P. F. Mastinu, M. Mastromarco, F. Matteucci, E. Maugeri, A. Mazzone, A. Mengoni, V. Michalopoulou, P. M. Milazzo, F. Mingrone, A. Musumarra, A. Negret, R. Nolte, F. Ogállar, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, L. Piersanti, I. Porras, J. Praena, J. M. Quesada, D. Radeck, D. Ramos Doval, R. Reifarth, D. Rochman, C. Rubbia, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, A. G. Smith, N. Sosnin, A. Stamatopoulos, G. Tagliente, J. L. Tain, Z. Talip, A. E. Tarifeño-Saldivia, L. Tassan-Got, P. Torres-Sánchez, A. Tsinganis, J. Ulrich, S. Urlass, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, P. J. Woods, T. J. Wright, and P. Žugec

Subjects
General Medicine
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, critical fast reactors like Gen-IV systems, and other innovative reactor systems such as accelerator driven systems (ADS). In particular, 244Cm, 246Cm and 248Cm play a role in the transport, storage and transmutation of the nuclear waste of the current nuclear reactors, due to the contribution of these isotopes to the radiotoxicity, neutron emission, and decay heat in the spent nuclear fuel. Also, capture reactions in these Cm isotopes open the path for the formation of heavier elements. In this work, the results of the capture cross section measurement on 244Cm, 246Cm and 248Cm performed at the CERN n_TOF facility are presented. It is important to notice that the Cm samples used in the experiment at n_TOF have been used previously in an experiment at J-PARC, this experiment and the previous one done in the 70s with a nuclear explosion were the only previous capture experiments for these isotopes. At n_TOF, the capture cross section measurements of 244Cm, 246Cm and 248Cm were performed at the 20 m vertical flight path (EAR2) with three C6D6 total energy detectors. In addition, the cross section of 244Cm was measured at the 185 m flight path (EAR1) with a Total Absorption Calorimeter (TAC). The combination of measurements in EAR1 and EAR2 has contributed to controlling and reducing the systematic uncertainties in the results. The compatibility of the different measurements performed and the techniques to obtain the results are presented in this paper as well as the procedure to obtain the resonance parameters.

Published
2023

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. $^{80}$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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. Characterization and First Test of an i-TED Prototype at CERN n_TOF

Author

Ralf Nolte, A. Kimura, L. A. Damone, Mario Barbagallo, Y. H. Chen, V. Bécares, D. Schumann, G. Cortes, I. Duran, R. Dressler, L. Cosentino, O. Aberle, A. Gawlik, K. Göbel, B. Fernández-Domíngez, Luis Caballero, Ignacio Porras, Rene Reifarth, M. A. Cortés-Giraldo, Simone Gilardoni, C. Rubbia, Alfredo Ferrari, A. Oprea, P. Schillebeeckx, E. Chiaveri, D. Cano-Ott, T. Wright, D. Macina, J. Heyse, J. M. Quesada, L. Tassan-Got, Emilio Andrea Maugeri, M. Krtička, G. Bellia, M. Mastromarco, M. Kokkoris, Sergio Cristallo, Paolo Finocchiaro, V. Furman, F. Ogállar, A. Pavlik, T. Martinez, Z. Talip, G. Tagliente, C. Domingo-Pardo, D. Ramos Doval, Alexandru Negret, G. Vannini, Anton Wallner, Javier Praena, S. Lo Meo, F. Bečvář, A. Saxena, F. Käppeler, A. S. Brown, A. Masi, V. Babiano-Suarez, E. Mendoza, I. Ferro-Gon calves, D. G. Jenkins, A. Casanovas, J. Ulrich, P. J. Woods, Maurizio Busso, P. F. Mastinu, S. Valenta, M. Sabaté-Gilarte, A. Manna, D. Radeck, N. Patronis, Francesca Matteucci, Marco Calviani, P. Vaz, E. Berthoumieux, M. Caamaño, A. G. Smith, S. Heinitz, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Diakaki, Alberto Ventura, V. Variale, Dimitri Rochman, M. Dietz, F. Cerutti, Alberto Mengoni, J. Lerendegui-Marco, S. Amaducci, I. Ladarescu, J. Billowes, R. Vlastou, Damir Bosnar, N. V. Sosnin, Y. Kadi, J. L. Tain, A. Stamatopoulos, Annamaria Mazzone, Petar Žugec, Niko Kivel, Z. Eleme, Carlos Guerrero, E. González-Romero, L. Audouin, V. Michalopoulou, V. Alcayne, S. Urlass, A. Musumarra, Claudia Lederer-Woods, Deniz Kurtulgil, A. Tsinganis, Luciano Piersanti, Nicola Colonna, E. Dupont, M. Bacak, T. Glodariu, Y. Kopatch, T. Rausher, F. Gunsing, Cristian Massimi, F. Mingrone, J. Andrzejewski, V. Vlachoudis, F. Calviño, P. M. Milazzo, J. Perkowski, 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, García-Ramos JE., Andrés M., Valera J., Moro A., Pérez-Bernal F., Babiano-Suarez V., Caballero L., Domingo-Pardo C., Ladarescu I., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Bacak M., Barbagallo M., Becares V., Becvar F., Bellia G., Berthoumieux E., Billowes J., Bosnar D., Brown A.S., Busso M., Caamano M., Calviani M., Calvino F., Cano-Ott D., Casanovas A., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Diakaki M., Dietz M., Dressler R., Dupont E., Duran I., Eleme Z., Fernandez-Domingez B., Ferrari A., Ferro-Gon calves I., Finocchiaro P., Furman V., Gawlik A., Gilardoni S., Glodariu T., Gobel K., Gonzalez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Kadi Y., Kappeler F., Kimura A., Kivel N., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., 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., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Mingrone F., 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., Rausher T., 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., Tsinganis A., Ulrich J., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., Zugec P., 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), Babiano-Suarez, V., Caballero, L., Domingo-Pardo, C., Ladarescu, I., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Barbagallo, M., Becares, V., Becvar, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A. S., Busso, M., Caamano, M., Calviani, M., Calvino, F., Cano-Ott, D., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Duran, I., Eleme, Z., Fernandez-Domingez, B., Ferrari, A., Ferro-Gon calves, I., Finocchiaro, P., Furman, V., Gawlik, A., Gilardoni, S., Glodariu, T., Gobel, K., Gonzalez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Kadi, Y., Kappeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., 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., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., 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., Rausher, T., 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., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., Zugec, P., García-Ramos, José-Enrique, Andrés, María V., Lay Valera, José A., Moro, Antonio M., and Pérez-Bernal, Francisco

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, Gamma ray, i-TED, n_TOF, characterization, Neutron radiation, Radiation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 030218 nuclear medicine & medical imaging, Nuclear physics, 03 medical and health sciences, Neutron capture, 0302 clinical medicine, Neutron cross section, Neutron, Gamma spectroscopy, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], iTED, n_TOF, neutron
Abstract

International audience; Neutron capture cross section measurements are of fundamental importance for the study of the slow process of neutron capture, so called s-process. This mechanism is responsible for the formation of most elements heavier than iron in the Universe. To this aim, installations and detectors have been developed, as total energy radiation C$_{6}$ D$_{6}$ detectors. However, these detectors can not distinguish between true capture gamma rays from the sample under study and neutron induced gamma rays produced in the surroundings of the setup. To improve this situation, we propose (Domingo Pardo in Nucl Instr Meth Phys Res A 825:78–86, 2016, [1]) the use of the Compton principle to select events produced in the sample and discard background events. This involves using detectors capable of resolving the interaction position of the gamma ray inside the detector itself, as well as a high energy resolution. These are the main features of i-TED, a total energy detector capable of gamma ray imaging. Such system is being developed at the “Gamma Spectroscopy and Neutrons Group” at IFIC ( http://webgamma.ific.uv.es/gamma/es/ , [2]), in the framework of the ERC-funded project HYMNS (High sensitivitY and Measurements of key stellar Nucleo-Synthesis reactions). This work summarizes first tests with neutron beam at CERN n $\_$ TOF.

Published
2018

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