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1. Corrigendum: 'Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis' [Phys. Lett. B 790 (2019) 458–465]

Author

C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec

Subjects
Physics, QC1-999
Published
2023
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2. Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Author

C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec

Subjects
Physics, QC1-999
Abstract

73Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV 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. Keywords: Nucleosynthesis, Neutron capture, s process, Germanium, n_TOF

Published
2019
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3. Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

Author

C. Massimi, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécares, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, S. Bisterzo, D. Bosnar, M. Brugger, M. Calviani, F. Calviño, D. Cano-Ott, C. Carrapiço, D.M. Castelluccio, F. Cerutti, E. Chiaveri, L. Cosentino, M. Chin, G. Clai, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, S. Cristallo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, C. Eleftheriadis, A. Ferrari, P. Finocchiaro, K. Fraval, S. Ganesan, A.R. García, G. Giubrone, I.F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, A. Hernández-Prieto, D.G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, S. Kopecky, M. Krtička, J. Kroll, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L.S. Leong, S. Lo Meo, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, P.F. Mastinu, M. Mastromarco, E. Mendoza, A. Mengoni, P.M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, A. Musumarra, C. Paradela, A. Pavlik, J. Perkowski, M. Pignatari, L. Piersanti, A. Plompen, J. Praena, J.M. Quesada, T. Rauscher, R. Reifarth, A. Riego, M.S. Robles, C. Rubbia, M. Sabaté-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J.L. Tain, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, I. Van Rijs, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiß, R. Wynants, T. Wright, and P. Žugec

Subjects
s Process, α+22Ne, Neutron spectroscopy, Physics, QC1-999
Abstract

This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg 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 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.

Published
2017
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4. High accuracy, high resolution $^{235}$U(n,f) cross section from n_TOF (CERN) from 18 meV to 10 keV

Author

M. Mastromarco, S. Amaducci, N. Colonna, P. Finocchiaro, L. Cosentino, M. Barbagallo, O. Aberle, J. Andrzejewski, L. Audouin, M. Bacak, J. Balibrea, F. Bečvář, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, G. Cortés, M. A. Cortés-Giraldo, L. A. Damone, M. Diakaki, C. Domingo-Pardo, D. Diacono, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Ferreira, V. Furman, K. Göbel, A. R. García, A. Gawlik, S. Gilardoni, T. Glodariu, I. F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, H. Harada, S. Heinitz, J. Heyse, D. G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, A. Kalamara, P. Kavrigin, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, D. Kurtulgil, E. Leal-Cidoncha, C. Lederer, H. Leeb, J. Lerendegui-Marco, S. Lo Meo, S. J. Lonsdale, D. Macina, A. Manna, J. Marganiec, T. Martínez, A. Masi, C. Massimi, P. Mastinu, E. A. Maugeri, A. Mazzone, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, A. Musumarra, A. Negret, R. Nolte, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, I. Porras, J. Praena, J. M. Quesada, D. Radeck, T. Rauscher, R. Reifarth, C. Rubbia, J. A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, P. Sedyshev, A. G. Smith, N. V. Sosnin, A. Stamatopoulos, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, C. Weiss, P. J. Woods, T. Wright, P. Žugec, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mastromarco, M, Amaducci, S, Colonna, N, Finocchiaro, P, Cosentino, L, Barbagallo, M, Aberle, O, Andrzejewski, J, Audouin, L, Bacak, M, Balibrea, J, Becvar, F, Berthoumieux, E, Billowes, J, Bosnar, D, Brown, A, Caamano, M, Calvino, F, Calviani, M, Cano-Ott, D, Cardella, R, Casanovas, A, Cerutti, F, Chen, YH, Chiaveri, E, Cortes, G, Cortes-Giraldo, MA, Damone, LA, Diakaki, M, Domingo-Pardo, C, Diacono, D, Dressler, R, Dupont, E, Duran, I, Fernandez-Dominguez, B, Ferrari, A, Ferreira, P, Furman, V, Gobel, K, Garcia, AR, Gawlik, A, Gilardoni, S, Glodariu, T, Goncalves, IF, Gonzalez-Romero, E, Griesmayer, E, Guerrero, C, Gunsing, F, Harada, H, Heinitz, S, Heyse, J, Jenkins, DG, Jericha, E, Kappeler, F, Kadi, Y, Kalamara, A, Kavrigin, P, Kimura, A, Kivel, N, Knapova, I, Kokkoris, M, Krticka, M, Kurtulgil, D, Leal-Cidoncha, E, Lederer, C, Leeb, H, Lerendegui-Marco, J, LoMeo, S, Lonsdale, SJ, Macina, D, Manna, A, Marganiec, J, Martinez, T, Masi, A, Massimi, C, Mastinu, P, Maugeri, EA, Mazzone, A, Mendoza, E, Mengoni, A, Milazzo, PM, Mingrone, F, Musumarra, A, Negret, A, Nolte, R, Oprea, A, Patronis, N, Pavlik, A, Perkowski, J, Porras, I, Praena, J, Quesada, JM, Radeck, D, Rauscher, T, Reifarth, R, Rubbia, C, Ryan, JA, Sabate-Gilarte, M, Saxena, A, Schillebeeckx, P, Schumann, D, Sedyshev, P, Smith, AG, Sosnin, NV, Stamatopoulos, A, Tagliente, G, Tain, JL, Tarifeno-Saldivia, A, Tassan-Got, L, Valenta, S, Vannini, G, Variale, V, Vaz, P, Ventura, A, Vlachoudis, V, Vlastou, R, Wallner, A, Warren, S, Weiss, C, Woods, PJ, Wright, T, Zugec, P, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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, and n_TOF

Subjects
Neutrons, Nuclear and High Energy Physics, Fission, Energies [Àrees temàtiques de la UPC], Nuclear physics, 235U, fission, cross section, n_TOF, CERN, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Espectroscòpia de ressonància magnètica nuclear, Resonance, n_TOF, cross section, 235U, CERN, Física nuclear, Nuclear Physics - Experiment, Nuclear Experiment, Nuclear magnetic resonance spectroscopy, Neutron energy
Abstract

The 235U(n,f) cross section was measured in a wide energy range (18 meV–170 keV) at the n_TOF facility at CERN, relative to 6Li(n,t) and 10B(n,α) standard reactions, with high resolution and accuracy, with a setup based on a stack of six samples and six silicon detectors placed in the neutron beam. In this paper we report on the results in the region between 18 meV and 10 keV neutron energy. A resonance analysis has been performed up to 200 eV, with the code SAMMY. The resulting fission kernels are compared with the ones extracted on the basis of the resonance parameters of the most recent major evaluated data libraries.Acomparison of the n_TOF datawith the evaluated cross sections is also performed from thermal to 10 keV neutron energy for the energy-averaged cross section in energy groups of suitably chosen width. A good agreement, within 0.5%, is found on average between the new results and the latest evaluated data files ENDF/B-VIII.0 and JEFF-3.3, as well as with respect to the broad group average fission cross section established in the framework of the standard working group of IAEA (the so-called reference file). However, some discrepancies, of up to 4%, are still present in some specific energy regions. The newdataset here presented, characterized by a unique combination of high resolution and accuracy, low background and wide energy range, can help to improve the evaluations from the Resolved Resonance Region up to 10 keV, also reducing the uncertainties that affect this region., CERN (European Organization for Nuclear Research)

Published
2022

5. The Stellar 72Ge(n, γ) Cross Section for weak s-process: A First Measurement at n_TOF

Author

M. Dietz, C. Lederer-Woods, A. Tattersall, U. Battino, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, M. Krtička, R. Reifarth, S. Valenta, O. Aberle, S. Amaducci, J. Andrzejewski, L. Audouin, M. Bacak, J. Balibrea, M. Barbagallo, F. Bečvář, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, L. A. Damone, M. Diakaki, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Ferreira, P. Finocchiaro, K. Göbel, A. R. García, A. Gawlik-Ramie˛ga, S. Gilardoni, T. Glodariu†, I. F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, H. Harada, J. Heyse, D. G. Jenkins, E. Jericha, F. Käppeler†, Y. Kadi, D. Kahl, A. Kalamara, P. Kavrigin, A. Kimura, N. Kivel, M. Kokkoris, D. Kurtulgil, E. Leal-Cidoncha, H. Leeb, S. Lo Meo, S. J. Lonsdale, D. Macina, A. Manna, J. Marganiec, T. Martínez, A. Masi, C. Massimi, P. Mastinu, M. Mastromarco, E. A. Maugeri, A. Mazzone, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, A. Musumarra, A. Negret, R. Nolte, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, I. Porras, J. Praena, J. M. Quesada, D. Radeck, T. Rauscher, C. Rubbia, J. A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, A. G. Smith, N. V. Sosnin, A. Stamatopoulos, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, C. Weiss, P. J. Woods, T. Wright, and P. Žugec

Subjects
General Medicine
Abstract

The slow neutron capture process (s-process) is responsible for producing about half of the elemental abundances heavier than iron in the universe. Neutron capture cross sections on stable isotopes are a key nuclear physics input for s-process studies. The 72Ge(n, γ) Maxwellian-Averaged Cross Section (MACS) has an important influence on the production of isotopes between Ge and Zr in the weak s-process in massive stars and so far only theoretical estimations are available. An experiment was carried out at the neutron time-of-flight facility n_TOF at CERN to measure the 72Ge(n, γ) reaction for the first time at stellar neutron energies. The capture measurement was performed using an enriched 72GeO2 sample at a flight path length of 184 m, which provided high neutron energy resolution. The prompt gamma rays produced after neutron capture were detected with a set of liquid scintillation detectors (C6D6). The neutron capture yield is derived from the counting spectra taking into account the neutron flux and the gamma-ray detection efficiency using the Pulse Height Weighting Technique. Over 70 new neutron resonances were identified, providing an improved resolved reaction cross section to calculate experimental MACS values for the first time. The experiment, data analysis and the new MACS results will be presented including their impact on stellar nucleosynthesis, which was investigated using the post-processing nucleosynthesis code mppnp for a 25 solar mass model.

Published
2023

6. 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

7. Destruction of the cosmic γ -ray emitter Al26 in massive stars: Study of the key Al26(n,α) reaction

Author

M. Caamaño, A. Gawlik, Thomas Rauscher, M. Bacak, T. Davinson, A. Pavlik, C. Domingo-Pardo, E. González-Romero, M. Sabaté-Gilarte, T. Glodariu, M. Mastromarco, D. Cano-Ott, G. Cortes, G. Tagliente, M. Diakaki, Alexandru Negret, C. Weiss, B. Fernández-Domínguez, F. Käppeler, Javier Praena, S. Lo Meo, A. R. García, S. Heinitz, Rugard Dressler, Massimo Barbagallo, A. Oprea, D. Bosnar, Emilio Andrea Maugeri, A. Kimura, A. Casanovas, N. Colonna, M. Kokkoris, J. Marganiec, N. V. Sosnin, M. A. Cortés-Giraldo, Anton Wallner, Rene Reifarth, J. Andrzejewski, A. Mengoni, I. Duran, L. Cosentino, A. Musumarra, Y. H. Chen, J. Balibrea, P. Vaz, A. Manna, Annamaria Mazzone, Petar Žugec, P. J. Woods, Vasilis Vlachoudis, N. Patronis, D. Macina, Carlos Guerrero, A. K. Saxena, A. Stamatopoulos, Arnaud Ferrari, F. Cerutti, J. Billowes, F. J. Ferrer, P. Kavrigin, Ralf Nolte, Hideo Harada, J. M. Quesada, Simone Gilardoni, E. Griesmayer, L. A. Damone, A. Masi, D. G. Jenkins, L. Tassan-Got, R. Cardella, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Krtička, S. Warren, J. Lerendegui-Marco, V. Variale, S. Amaducci, Sergio Cristallo, Claudia Lederer-Woods, T. Martinez, Y. Kadi, E. Dupont, I. F. Gonçalves, Kathrin Göbel, Deniz Kurtulgil, P. V. Sedyshev, A. Ventura, S. Valenta, Marco Calviani, R. Vlastou, D. Radeck, A. G. Smith, E. Chiaveri, Ignacio Porras, E. Berthoumieux, P. F. Mastinu, Jan Heyse, A. Kalamara, V. Furman, T. J. Wright, C. Paradela, J. L. Tain, L. Audouin, Niko Kivel, O. Aberle, F. Calviño, H. Leeb, J. Perkowski, Pedro G. Ferreira, F. Gunsing, Cristian Massimi, C. Rubbia, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, A. S. Brown, P. M. Milazzo, F. Bečvář, E. Mendoza, Peter Schillebeeckx, A. Estrade, F. Mingrone, D. Kahl, G. Vannini, and E. Leal-Cidoncha

Subjects
Physics, Stars, COSMIC cancer database, 010308 nuclear & particles physics, European research, 0103 physical sciences, Key (cryptography), Astronomy, Cost action, 010303 astronomy & astrophysics, 01 natural sciences
Abstract

We thank P. Black (University of Edinburgh) for support in design and construction of the detection system and P. Morrall (Daresbury Laboratory) for production of the B and LiF reference samples. This Letter was supported by the Austrian Science Fund (FWF), Project No. J3503, by JRCIRMM through the EUFRAT Program, by the U.K. Science and Technologies Facilities Council (STFC), Projects No. ST/L005824/1 and No. ST/M006085/1, the European Research Council ERC-2015-STG Grant No. 677497, and the Cost Action "ChETEC" (Grant No. CA16117).

Published
2021

8. Measurement of the 72Ge(n,γ) cross section over a wide neutron energy range at the CERN n_TOF facility

Author

Javier Praena, S. Lo Meo, J. Lerendegui-Marco, S. Amaducci, F. Mingrone, A. Kalamara, I. F. Gonçalves, Simone Gilardoni, N. Colonna, R. Cardella, S. Heinitz, A. Stamatopoulos, F. Cerutti, R. Vlastou, D. Radeck, D. Cano-Ott, M. Diakaki, O. Aberle, E. Berthoumieux, U. Battino, A. Pavlik, G. Tagliente, S. Valenta, G. Vannini, C. Domingo-Pardo, Ignacio Porras, Y. H. Chen, Marco Calviani, S. Warren, M. Sabaté-Gilarte, M. Caamaño, A. Ventura, A. G. Smith, F. Bečvář, D. Macina, Carlos Guerrero, N. V. Sosnin, A. Oprea, V. Variale, A. S. Brown, E. Mendoza, Annamaria Mazzone, Petar Žugec, J. Marganiec, Philip Woods, N. Patronis, Rene Reifarth, A. K. Saxena, G. Cortes, L. Audouin, Peter Schillebeeckx, Arnaud Ferrari, M. Bacak, D. Bosnar, P. M. Milazzo, Alexandru Negret, J. Billowes, Cortés-Giraldo, J. M. Quesada, L. Tassan-Got, Pedro G. Ferreira, A. Casanovas, B. Fernández-Domínguez, M. Krtička, Ariel Tarifeño-Saldivia, S. J. Lonsdale, F. Käppeler, T. Glodariu, V. Furman, T. J. Wright, D. Kahl, J. L. Tain, Hideo Harada, Emilio Andrea Maugeri, M. Mastromarco, T. Martinez, Niko Kivel, M. Kokkoris, Kathrin Göbel, Claudia Lederer-Woods, J. Andrzejewski, I. Duran, Rugard Dressler, Y. Kadi, Massimo Barbagallo, E. Jericha, L. Cosentino, Anton Wallner, Paolo Finocchiaro, E. Chiaveri, C. Rubbia, P. F. Mastinu, Dorothea Schumann, J. Balibrea, J. A. Ryan, Jan Heyse, Vasilis Vlachoudis, Deniz Kurtulgil, P. V. Sedyshev, F. Calviño, H. Leeb, J. Perkowski, F. Gunsing, Cristian Massimi, A. Masi, D. G. Jenkins, A. Manna, A. Tattersall, P. Kavrigin, Ralf Nolte, E. Griesmayer, L. A. Damone, C. Weiss, A. Musumarra, A. Mengoni, M. Dietz, A. R. García, A. Kimura, E. Leal-Cidoncha, E. Dupont, A. Gawlik, Thomas Rauscher, E. González-Romero, and P. Vaz

Subjects
Physics, Large Hadron Collider, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Liquid scintillation counting, 7. Clean energy, 01 natural sciences, Resonance (particle physics), Neutron temperature, Nuclear physics, Cross section (physics), Beamline, 13. Climate action, 0103 physical sciences, Nuclear astrophysics, Neutron, Nuclear Experiment, 010306 general physics
Abstract

The Ge72(n,γ) cross section was measured for neutron energies up to 300keV at the neutron time-of-flight facility n_TOF (CERN), Geneva, for the first time covering energies relevant to heavy-element synthesis in stars. The measurement was performed at the high-resolution beamline EAR-1, using an isotopically enriched GeO272 sample. The prompt capture γ rays were detected with four liquid scintillation detectors, optimized for low neutron sensitivity. We determined resonance capture kernels up to a neutron energy of 43keV, and averaged cross sections from 43 to 300keV. Maxwellian-averaged cross section values were calculated from kT=5 to 100keV, with uncertainties between 3.2% and 7.1%. The new results significantly reduce uncertainties of abundances produced in the slow neutron capture process in massive stars.

Published
2021

9. Radiative Neutron Capture Cross-Section Measurement of Ge Isotopes at n_TOF CERN Facility and Its Importance for Stellar Nucleosynthesis

Author

M. Bacak, A. Musumarra, P. J. Woods, T. Glodariu, N. Patronis, A. Pavlik, Roberto Losito, Rene Reifarth, Stefan Schmidt, Cortés-Giraldo, J. M. Quesada, L. Tassan-Got, Tanja Heftrich, A. Riego-Perez, S.L. Meo, A. K. Saxena, Arnaud Ferrari, C. Domingo-Pardo, L. Audouin, G. Vannini, P. C. Rout, L. Cosentino, E. Dupont, J. Billowes, S. Montesano, Tatsuya Katabuchi, A. Stamatopoulos, S. Barros, A. Mengoni, K. Rajeev, M. Caamaño, Petar Žugec, A. Kimura, Rugard Dressler, Francesca Matteucci, D. G. Jenkins, Emilio Andrea Maugeri, A. Tsinganis, P. Kavrigin, Nicola Colonna, M. Kokkoris, Mario Barbagallo, A. Oprea, Vasilis Vlachoudis, I. Knapova, V. Ketlerov, G. Tagliente, G. Cortes, Ralf Nolte, P. Vaz, B. Fernández-Domínguez, F. Käppeler, E. Griesmayer, Kathrin Göbel, Alberto Ventura, A. Casanovas, A. Goverdovski, O. Aberle, L. A. Damone, D. Bosnar, Jan Heyse, J. I. Porras, A. R. García, U. Battino, M. Brugger, A. Tattersall, V. Furman, T. J. Wright, F. Cerutti, C. Beinrucker, R. Vlastou, I. Duran, E. Leal-Cidoncha, E. Berthoumieux, A. Gawlik, Thomas Rauscher, D. Cano-Ott, M. Diakaki, E. González-Romero, R. Cardella, Javier Praena, F. Bečvář, C. Wolf, E. Mendoza, Peter Schillebeeckx, V. Bécares, E. Jericha, Paolo Finocchiaro, F. Gunsing, Dorothea Schumann, J. A. Ryan, Cristian Massimi, Pedro G. Ferreira, Mario Weigand, M. Krtička, M. Mirea, F. Calviño, H. Leeb, J. Perkowski, T. Martinez, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. Lerendegui-Marco, S. Heinitz, V. Khryachkov, E. Chiaveri, P. F. Mastinu, P. M. Milazzo, Y. H. Chen, I. F. Gonçalves, M. Sabaté-Gilarte, S. Warren, V. Variale, M. Mastromarco, Anton Wallner, J. Balibrea, D. M. Castelluccio, Hideo Harada, D. Macina, Carlos Guerrero, Claudia Lederer-Woods, P. V. Sedyshev, F. Mingrone, J. Andrzejewski, C. Rubbia, J. L. Tain, Niko Kivel, C. Weiss, Y. Kadi, S. Valenta, Marco Calviani, A. G. Smith, M. Dietz, 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, 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), Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Astrofísica, Astrophysics and Astronomy, Isotopes of germanium, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, chemistry.chemical_element, Germanium, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 7. Clean energy, Nuclear physics, Stellar nucleosynthesis, Isotopes, Nucleosynthesis, CERN, Neutron cross section, Neutron, Nuclear Physics - Experiment, n_TOF, Nuclear Experiment, Stellar activity, Physics, Física [Àrees temàtiques de la UPC], Neutron temperature, Neutron capture cross-section, Neutron capture, Activitat estelar, chemistry, Neutron time-of-flight, MACS, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], radiative neutron capture, Ge isotopes, n_TOF, stellar nucleosynthesis
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 the support of the National Science Centre, Poland, under the grant UMO-2016/22/M/ST2/00183, the MSMT of the Czech Republic and the Croatian Science Foundation under the project IP-2018-01-8570., This manuscript summarizes the results of radiative neutron capture cross-section measurements on two stable germanium isotopes, Ge-70 and Ge-73. Experiments were performed at the n_TOF facility at CERN via the time-of-flight technique, over a wide neutron energy range, for all stable germanium isotopes (70,72,73,74, and 76). Results for Ge-70 [Phys. Rev. C 100, 045804 (2019)] and Ge-73 [Phys. Lett. B 790, 458 (2019)] are already published. In the field of nuclear structure, such measurements allow to study excited levels close to the neutron binding energy and to obtain information on nuclear properties. In stellar nucleosynthesis research, neutron induced reactions on germanium are of importance for nucleosynthesis in the weak component of the slow neutron capture processes., Austrian Science Fund (FWF) J3503, Adolf Messer Foundation (Germany), UK Science and Facilities Council ST/M006085/1, European Research Council (ERC), European Commission 677497, National Science Centre, Poland UMO-2016/22/M/ST2/00183, Ministry of Education, Youth & Sports - Czech Republic, Croatian Science Foundation IP-2018-01-8570

Published
2021
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10. 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

11. 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

12. 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

13. 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

14. A compact fission detector for fission-tagging neutron capture experiments with radioactive fissile isotopes

Author

D. Macina, A. Musumarra, K. Göbel, M. Sabaté-Gilarte, E. Mendoza, A. Oprea, I. Knapova, N. V. Sosnin, T. Wright, J. Heyse, Rene Reifarth, N. Kivel, R. Nolte, L. Cosentino, J. Marganiec, P. F. Mastinu, P. Vaz, F. Bečvář, Annamaria Mazzone, Petar Žugec, M. Aiche, I. Duran, Stefan Kopecky, A. Saxena, A. Kimura, Alberto Ventura, G. Vannini, S. Valenta, Nicola Colonna, M. Kokkoris, M. A. Cortés-Giraldo, P. M. Milazzo, R. Dressler, P. Kavrigin, E. Dupont, Carlos Guerrero, G. Sibbens, M. Mastromarco, Marco Calviani, B. Laurent, E. González-Romero, P. Ferreira, Mario Barbagallo, L. Audouin, M. Krtička, A. Pavlik, A. G. Smith, J. Billowes, D. Schumann, E. Griesmayer, Anton Wallner, Alexandru Negret, G. Cortes, C. Domingo-Pardo, G. Tagliente, M. Bacak, L. A. Damone, F. Käppeler, J. Balibrea, Philip Woods, O. Aberle, D. Vanleeuw, F. Mingrone, J. Andrzejewski, F. Calviño, H. Leeb, E. A. Maugeri, A. Kalamara, T. Martinez, C. Weiss, R. Vlastou, Olivier Serot, Carlo Rubbia, V. Vlachoudis, J. Perkowski, M. Diakaki, D. Radeck, Alfredo Ferrari, E. Berthoumieux, Stephan Richter, P. Schillebeeckx, S. Warren, F. Gunsing, A. Masi, Damir Bosnar, Y. Kadi, A. Manna, Hideo Harada, Deniz Kurtulgil, V. Variale, D. G. Jenkins, Y. H. Chen, Cristian Massimi, P. V. Sedyshev, G. Belier, S. Heinitz, V. Furman, A. Stamatopoulos, E. Chiaveri, D. Cano-Ott, A. S. Brown, A. Casanovas, C. Lederer, E. Jericha, T. Glodariu, Paolo Finocchiaro, J. M. Quesada, L. Tassan-Got, A. Moens, J. A. Ryan, S. Amaducci, Simone Gilardoni, R. Cardella, Javier Praena, S. Lo Meo, M. Caamaño, F. Cerutti, B. Fernández-Domínguez, J. L. Tain, J. Taieb, L. Mathieu, E. Leal-Cidoncha, A. Gawlik, Thomas Rauscher, A. R. García, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Ignacio Porras, J. Lerendegui-Marco, I. F. Gonçalves, N. Patronis, Alberto Mengoni, 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), 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), Bacak, M., Aiche, M., Belier, G., Berthoumieux, E., Diakaki, M., Dupont, E., Gunsing, F., Heyse, J., Kopecky, S., Laurent, B., Leeb, H., Mathieu, L., Moens, A., Richter, S., Schillebeeckx, P., Serot, O., Sibbens, G., Taieb, J., Vanleeuw, D., Vlachoudis, V., Aberle, O., Amaducci, S., Andrzejewski, J., Audouin, L., Balibrea, J., Barbagallo, M., Becvar, F., Billowes, J., Bosnar, D., Brown, A., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Domingo-Pardo, C., Dressler, R., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Gobel, K., Garcia, A. R., Gawlik, A., Gilardoni, S., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Griesmayer, E., Guerrero, C., Harada, H., Heinitz, S., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Macina, D., Manna, A., Marganiec, J., Martinez, 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., Sabate-Gilarte, M., Saxena, A., Schumann, D., Sedyshev, P., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Woods, P. J., Wright, T., Zugec, P., Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), 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, Bacak M., Aiche M., Belier G., Berthoumieux E., Diakaki M., Dupont E., Gunsing F., Heyse J., Kopecky S., Laurent B., Leeb H., Mathieu L., Moens A., Richter S., Schillebeeckx P., Serot O., Sibbens G., Taieb J., Vanleeuw D., Vlachoudis V., Aberle O., Amaducci S., Andrzejewski J., Audouin L., Balibrea J., Barbagallo M., Becvar F., Billowes J., Bosnar D., Brown A., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortes G., Cortes-Giraldo M.A., Cosentino L., Damone L.A., Domingo-Pardo C., Dressler R., Duran I., Fernandez-Dominguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Gobel K., Garcia A.R., Gawlik A., Gilardoni S., Glodariu T., Goncalves I.F., Gonzalez-Romero E., Griesmayer E., Guerrero C., Harada H., Heinitz S., Jenkins D.G., Jericha E., Kappeler F., Kadi Y., Kalamara A., Kavrigin P., Kimura A., Kivel N., Knapova I., Kokkoris M., Krticka M., Kurtulgil D., Leal-Cidoncha E., Lederer C., Lerendegui-Marco J., Lo Meo S., Lonsdale S.J., Macina D., Manna A., Marganiec J., Martinez 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., Sabate-Gilarte M., Saxena A., Schumann D., Sedyshev P., Smith A.G., Sosnin N.V., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlastou R., Wallner A., Warren S., Weiss C., Woods P.J., Wright T., and Zugec P.

Subjects
Nuclear and High Energy Physics, Fission, Physics::Instrumentation and Detectors, Nuclear Theory, Física::Física de partícules [Àrees temàtiques de la UPC], Nuclear physics, Context (language use), Neutrons--Captura, 01 natural sciences, 7. Clean energy, Neutrons--Capture, 0103 physical sciences, Physics::Atomic and Molecular Clusters, 233 U, ddc:530, n_TOF, 010306 general physics, Nuclear Experiment, Instrumentation, Energies::Energia nuclear [Àrees temàtiques de la UPC], Physics, [PHYS]Physics [physics], Fission detector, 233U, Time-of-flight, Física [Àrees temàtiques de la UPC], Fissile material, 010308 nuclear & particles physics, Detector, Neutron radiation, Fast fission, NATURAL SCIENCES. Physics, Calorimeter, PRIRODNE ZNANOSTI. Fizika, Neutron capture, 13. Climate action, Física nuclear, Other
Abstract

In the measurement of neutron capture cross-sections of fissile isotopes, the fission channel is a source of background which can be removed efficiently using the so-called fission-tagging or fission-veto technique. For this purpose a new compact and fast fission chamber has been developed. The design criteria and technical description of the chamber are given within the context of a measurement of the 233U(n, ������) cross-section at the n_TOF facility at CERN, where it was coupled to the n_TOF Total Absorption Calorimeter. For this measurement the fission detector was optimized for time resolution, minimization of material in the neutron beam and for alpha-fission discrimination. The performance of the fission chamber and its application as a fission tagging detector are discussed., This work was partially supported by the French NEEDS/NACRE Project and by the European Commission within HORIZON2020 via the EURATOM Project EUFRAT.

Published
2020

15. 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

16. Accurate measurement of the standard 235U(n,f) cross section from thermal to 170 keV neutron energy

Author

A. Pavlik, C. Domingo-Pardo, J. Lerendegui-Marco, Pedro G. Ferreira, S. Amaducci, Emilio Andrea Maugeri, P. Kavrigin, Javier Praena, S. Lo Meo, I. F. Gonçalves, Ralf Nolte, M. Kokkoris, S. Valenta, A. Mengoni, F. Cerutti, D. Bosnar, J. Marganiec, Marco Calviani, E. Griesmayer, Simone Gilardoni, A. G. Smith, F. Mingrone, G. Tagliente, R. Cardella, L. A. Damone, C. Lederer, M. Sabaté-Gilarte, G. Vannini, N. V. Sosnin, Rugard Dressler, J. L. Tain, P. J. Woods, E. Chiaveri, P. F. Mastinu, F. Bečvář, E. Mendoza, C. Weiss, Niko Kivel, A. Kimura, N. Patronis, A. Casanovas, A. K. Saxena, Annamaria Mazzone, Petar Žugec, I. Knapova, A. Masi, O. Aberle, Rene Reifarth, A. R. García, P. Vaz, Arnaud Ferrari, F. Calviño, Nicola Colonna, H. Leeb, Peter Schillebeeckx, M. Caamaño, M. A. Cortés-Girardo, D. Cano-Ott, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Vasilis Vlachoudis, A. Musumarra, D. G. Jenkins, J. Billowes, M. Diakaki, A. Stamatopoulos, Alberto Ventura, J. Perkowski, M. Mastromarco, Kathrin Göbel, L. Cosentino, Ignacio Porras, M. Bacak, Mario Barbagallo, Deniz Kurtulgil, P. V. Sedyshev, M. Krtička, F. Gunsing, A. Manna, J. M. Quesada, L. Tassan-Got, E. Leal-Cidoncha, T. Glodariu, A. Gawlik, Anton Wallner, Thomas Rauscher, Jan Heyse, T. Martinez, A. Oprea, G. Cortes, Cristian Massimi, A. Kalamara, J. Balibrea, E. González-Romero, Y. H. Chen, C. Rubbia, V. Furman, T. J. Wright, Y. Kadi, D. Macina, R. Vlastou, D. Radeck, Carlos Guerrero, E. Berthoumieux, E. Jericha, L. Audouin, Paolo Finocchiaro, Dorothea Schumann, Hideo Harada, Alexandru Negret, J. A. Ryan, B. Fernández-Domínguez, F. Käppeler, A. S. Brown, S. Warren, P. M. Milazzo, V. Variale, S. Heinitz, J. Andrzejewski, I. Duran, E. Dupont, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., 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, 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, Silicon, 010308 nuclear & particles physics, Fission, Physics::Instrumentation and Detectors, QC1-999, Monte Carlo method, Detector, n_TOF, 235U, fission, neutron time of flight, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutron temperature, Nuclear physics, Cross section (physics), chemistry, 0103 physical sciences, Thermal, Nuclear Physics - Experiment, 010306 general physics
Abstract

An accurate measurement of the 235U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using 6Li(n,t)4He and 10B(n,α)7Li as references. This measurement has been carried out in order to investigate a possible overestimation of the 235U fission cross section evaluation provided by most recent libraries between 10 and 30 keV. A custom experimental apparatus based on in-beam silicon detectors has been used, and a Monte Carlo simulation in GEANT4 has been employed to characterize the setup and calculate detectors efficiency. The results evidenced the presence of an overestimation in the interval between 9 and 18 keV and the new data may be used to decrease the uncertainty of 235U(n,f) cross section in the keV region.

Published
2020

17. Measurement of material isotopics and atom number ratio with α-particle spectroscopy for a NIFFTE fission Time Projection Chamber actinide target

Author

J. A. Magee, C. A. Hagmann, Fredrik Tovesson, C. Prokop, B. Seilhan, W. Loveland, Denise Neudecker, A. Kemnitz, Daniel James Higgins, Mateusz Monterial, Nikolaos Fotiades, D. Cebra, D. Hensle, M. Heffner, L. Yao, L. D. Isenhower, N. Walsh, T.S. Watson, Samuele Sangiorgio, Kyle Schmitt, J. Gearhart, M. P. Mendenhall, R. S. Towell, Brett Manning, Jonathan B. King, Nathaniel Bowden, T. Classen, Uwe Greife, Shea Mosby, E. Leal-Cidoncha, J. L. Klay, J. Bundgaard, L. Snyder, Walid Younes, Robert Casperson, V. Geppert-Kleinrath, D.H. Dongwi, Kareem Kazkaz, Joseph Latta, and M. Anastasiou

Subjects
Physics, Nuclear and High Energy Physics, Time projection chamber, Isotope, Fission, Analytical chemistry, Atomic number, Actinide, Nuclear Experiment, Mass spectrometry, Spectroscopy, Instrumentation, Spectral line
Abstract

We present the results of a measurement of isotopic concentrations and atomic number ratio of a double-sided actinide target using α -spectroscopy and mass spectrometry. The double-sided actinide target, with predominantly 239Pu on one side and 235U on the other, was used in the fission Time Projection Chamber (fissionTPC) for a measurement of the neutron-induced fission cross-section ratio between the two isotopes. The measured atomic number ratio is needed to extract an absolute measurement fission cross-section ratio. The 239Pu/235U atom number ratio was measured with a combination of mass spectrometry and α -spectroscopy with a planar silicon detector achieving uncertainties of less than 1%. Different strategies for estimating isotopic concentration from the α -spectrum are presented to demonstrate the potential of these methods for non-destructive target assay. We found that a combination of fitting spectra with constraints from mass spectrometry, and summing counts in a region of the spectrum provided the most consistent results with the lowest uncertainty.

Published
2022

18. 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

19. 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

20. Measurement of the 235 U(n,f) cross section at n_TOF from thermal to 170 keV

Author

Emilio Andrea Maugeri, Alexandru Negret, Rene Reifarth, M. Kokkoris, M. Krtička, F. Mingrone, C. Lederer, I. Knapova, B. Fernández-Domínguez, F. Käppeler, P. Vaz, J. M. Quesada, L. Tassan-Got, P. J. Woods, A. Kalamara, Alberto Ventura, T. Martinez, N. Patronis, A. K. Saxena, Arnaud Ferrari, Alberto Mengoni, J. Billowes, G. Tagliente, F. Gunsing, A. Pavlik, G. Vannini, A. Oprea, A. Kimura, Cristian Massimi, C. Domingo-Pardo, M. Bacak, A. Casanovas, M. Caamaño, Y. H. Chen, Simone Gilardoni, L. Audouin, L. Cosentino, A. Masi, Mario Barbagallo, A. S. Brown, T. Glodariu, F. Bečvář, D. G. Jenkins, R. Vlastou, Rugard Dressler, D. Radeck, R. Cardella, M. Mastromarco, E. Berthoumieux, D. Bosnar, D. Macina, G. Cortes, Carlos Guerrero, E. Mendoza, F. Calviño, H. Leeb, J. L. Tain, Nicola Colonna, J. Marganiec, S. Heinitz, J. Perkowski, E. Dupont, F. Cerutti, Kathrin Göbel, A. Stamatopoulos, Peter Schillebeeckx, A. Manna, C. Weiss, Jan Heyse, P. M. Milazzo, M. A. Cortés-Giraldo, E. Chiaveri, N. V. Sosnin, P. F. Mastinu, Anton Wallner, D. Cano-Ott, M. Diakaki, Niko Kivel, Pedro G. Ferreira, Annamaria Mazzone, Petar Žugec, Deniz Kurtulgil, Javier Praena, S. Lo Meo, A. Musumarra, P. V. Sedyshev, J. Balibrea, S. Warren, Ariel Tarifeño-Saldivia, S. J. Lonsdale, V. Variale, Ignacio Porras, S. Amaducci, C. Rubbia, E. Jericha, O. Aberle, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, J. Lerendegui-Marco, V. Furman, T. J. Wright, I. F. Gonçalves, Hideo Harada, M. Sabaté-Gilarte, E. Leal-Cidoncha, A. Gawlik, Thomas Rauscher, P. Kavrigin, Ralf Nolte, E. Griesmayer, L. A. Damone, E. González-Romero, A. R. García, I. Duran, J. Andrzejewski, V. Vlachoudis, S. Valenta, Marco Calviani, A. G. Smith, Y. Kadi, 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, Anna Erickson, Marianne Hamm, 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, Cross-section, Fission, n_TOF, 235U, fission, neutron time of flight, 01 natural sciences, 7. Clean energy, Nuclear physics, uranium, Cross section (physics), Neutron flux, 0103 physical sciences, Neutron cross section, fission, Neutron, n_TOF, 010306 general physics, Nuclear Experiment, Neutrons, Physics, [PHYS]Physics [physics], 010308 nuclear & particles physics, neutrons, Order (ring theory), Neutron radiation, Standard, Neutron capture, Uranium, Other
Abstract

The [Formula: see text]U(n,f) cross section plays a key role for nuclear physics due to its widespread use as a standard reference for neutron cross section measurements and for neutron flux measurements. Recent experimental data of the fission cross section have suggested the presence of discrepancies around 6–8% with respect to the most used libraries, precisely in the range between 10 keV and 30 keV. In order to shed light on this disagreement, an accurate measurement of the [Formula: see text]U(n,f) fission cross section has been performed at n_TOF facility @CERN, using the standard reactions 6Li(n,t) and [Formula: see text]B(n,[Formula: see text] as reference. A custom experimental setup based on a stack of silicon detectors sandwiched between pairs of [Formula: see text]U, 6Li and [Formula: see text]B targets, has been installed along the neutron beam line to intercept the same neutron flux, allowing the detection of the fission fragments and the products of the reference reactions at the same time. Such a technique allows calculation of the cross section via the “ratio method”, by normalizing the [Formula: see text]U(n,f) reaction yields with respect to the reference reactions and to the recommended data in the IAEA libraries; in particular, the integral between 7.8 and 11 eV has been chosen. Accurate Monte Carlo simulations have allowed evaluation of the neutron absorption in the different layers, as well as the detection efficiency of each detector. The data are in excellent agreement with the standard values and highlight the overestimation of the [Formula: see text]U(n,f) cross section between 9 and 18 keV in the most recent libraries.

Published
2019

21. Erratum to: Cross section measurements of 155, 157Gd(n,$\gamma$γ) induced by thermal and epithermal neutrons

Author

G. Cortes, P. Kavrigin, D. M. Castelluccio, A. S. Brown, A. Manna, G. Tagliente, Ralf Nolte, C. Rubbia, F. Gunsing, D. Macina, Carlos Guerrero, O. Aberle, A. Musumarra, E. Griesmayer, L. A. Damone, G. Vannini, Kathrin Göbel, M. Krtička, A. Mengoni, Cristian Massimi, Jan Heyse, P. M. Milazzo, M. Caamaño, Simone Gilardoni, Deniz Kurtulgil, P. J. Woods, A. Kalamara, V. Furman, T. J. Wright, Alexandru Negret, T. Martinez, J. Lerendegui-Marco, J. Andrzejewski, B. Fernández-Domínguez, R. Vlastou, F. Käppeler, D. Radeck, E. Berthoumieux, A. Pavlik, N. Patronis, A. Casanovas, A. Kimura, Hideo Harada, A. K. Saxena, Y. H. Chen, L. Audouin, M. Sabaté-Gilarte, M. Bacak, N. V. Sosnin, Arnaud Ferrari, R. Cardella, Annamaria Mazzone, Petar Žugec, C. Domingo-Pardo, F. Mingrone, T. Glodariu, L. Cosentino, I. Duran, C. Lederer, I. F. Gonçalves, Pedro G. Ferreira, P. Sedyshev, E. Jericha, J. Marganiec, Rugard Dressler, F. Rocchi, Paolo Finocchiaro, R. Wynants, A. Stamatopoulos, F. Cerutti, Dorothea Schumann, M. Mastromarco, J. A. Ryan, Mario Barbagallo, E. Chiaveri, J. Billowes, P. F. Mastinu, J. L. Tain, Rene Reifarth, Nicola Colonna, E. Dupont, Vasilis Vlachoudis, Anton Wallner, A. R. García, J. M. Quesada, J. Balibrea, Niko Kivel, L. Tassan-Got, Javier Praena, Ignacio Porras, F. Bečvář, F. Calviño, H. Leeb, S. Valenta, E. Leal-Cidoncha, E. Mendoza, J. Perkowski, Giulia Clai, Peter Schillebeeckx, S. Warren, D. Bosnar, Emilio Andrea Maugeri, A. Gawlik, A. Guglielmelli, A. Masi, Thomas Rauscher, C. Weiss, Marco Calviani, V. Variale, M. Kokkoris, D. G. Jenkins, A. G. Smith, E. González-Romero, M. A. Cortés-Giraldo, Ariel Tarifeño-Saldivia, S. J. Lonsdale, I. Knapova, P. Vaz, Alberto Ventura, Y. Kadi, A. Oprea, S. Heinitz, D. Cano-Ott, and M. Diakaki

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Cross section (physics), Hadron, Thermal, Nuclear fusion, Epithermal neutron, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries)
Abstract

After publication of the paper, the authors noticed some errors in the list of authors and in the list of affiliations. Their correct version is given in this erratum.

Published
2019

22. 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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23. Measurement and analysis of 155,157Gd(n,γ) from thermal energy to 1 keV

Author

A. Mengoni, J. Marganiec, F. Bečvář, E. Chiaveri, A. Kimura, S. Valenta, Mario Barbagallo, E. Mendoza, P. F. Mastinu, C. Rubbia, Marco Calviani, G. Tagliente, A. Musumarra, A. G. Smith, L. Audouin, Peter Schillebeeckx, G. Vannini, A. Masi, Javier Praena, Emilio Andrea Maugeri, M. Caamaño, D. G. Jenkins, I. Duran, S. Warren, B. Fernández-Domínguez, P. Console Camprini, A. Guglielmelli, F. Käppeler, M. Kokkoris, A. Casanovas, A. Negret, D. Bosnar, V. Variale, Deniz Kurtulgil, Simone Gilardoni, A. Kalamara, P. V. Sedyshev, Rugard Dressler, Hideo Harada, P. J. Woods, M. Sabaté-Gilarte, L. Cosentino, Y. Kadi, A. R. García, N. Patronis, A. K. Saxena, R. Mucciola, J. L. Tain, M. A. Cortés-Giraldo, Y. H. Chen, R. Cardella, D. M. Castelluccio, J. Andrzejewski, D. Cano-Ott, Arnaud Ferrari, Niko Kivel, A. Manna, M. Diakaki, E. Dupont, J. Billowes, P. Kavrigin, C. Weiss, M. Mastromarco, D. Macina, F. Cerutti, Carlos Guerrero, Ralf Nolte, F. Calviño, Nicola Colonna, E. Griesmayer, L. A. Damone, H. Leeb, Kathrin Göbel, Anton Wallner, Ariel Tarifeño-Saldivia, S. J. Lonsdale, E. Leal-Cidoncha, J. Balibrea, Vasilis Vlachoudis, A. Pavlik, M. Krtička, C. Domingo-Pardo, J. Perkowski, J. Lerendegui-Marco, E. Jericha, Jan Heyse, Giulia Clai, A. Stamatopoulos, Paolo Finocchiaro, A. Gawlik, T. Martinez, Dorothea Schumann, Thomas Rauscher, S. Heinitz, J. A. Ryan, I. F. Gonçalves, Pedro G. Ferreira, I. Knapova, P. Vaz, A. S. Brown, Alberto Ventura, E. González-Romero, F. Gunsing, Cristian Massimi, Ignacio Porras, P. M. Milazzo, V. Furman, T. J. Wright, M. Bacak, T. Glodariu, R. Vlastou, D. Radeck, E. Berthoumieux, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, Rene Reifarth, J. M. Quesada, L. Tassan-Got, A. Oprea, F. Rocchi, O. Aberle, F. Mingrone, C. Lederer, 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, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., 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), and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear

Subjects
Nuclear reaction, Materials science, Isotope, 010308 nuclear & particles physics, business.industry, Physics, QC1-999, n_TOF, 155Gd, 157Gd, neutron capture, neutron time of flight, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Resonance (particle physics), Neutron temperature, Nuclear physics, Cross section (physics), Yield (chemistry), 0103 physical sciences, Thermal, Nuclear Physics - Experiment, 010306 general physics, business, Thermal energy
Abstract

We have measured the capture cross section of the 155Gd and 157Gd isotopes between 0.025 eV and 1 keV. The capture events were recorded by an array of 4 C6D6 detectors, and the capture yield was deduced exploiting the total energy detection system in combination with the Pulse Height Weighting Techniques. Because of the large cross section around thermal neutron energy, 4 metallic samples of different thickness were used to prevent problems related to self-shielding. The samples were isotopically enriched, with a cross contamination of the other isotope of less than 1.14%. The capture yield was analyzed with an R-Matrix code to describe the cross section in terms of resonance parameters. Near thermal energies, the results are significantly different from evaluations and from previous time-of-flight experiments. The data from the present measurement at n_TOF are publicly available in the experimental nuclear reaction database EXFOR. European Atomic Energy Community (Euratom) 605203 Ministerio de Economía y Competitividad FPA2014-52823-C2-1- P

Published
2020

24. Preliminary results on the 233U α-ratio measurement at n_TOF

Author

O. Serot, Stefan Kopecky, Y. H. Chen, Rene Reifarth, J. M. Quesada, L. Tassan-Got, Calviani, B. Laurent, J. Lerendegui-Marco, M. A. Cortés-Giraldo, A. Kimura, Alexandru Negret, L. Mathieu, Y. Kadi, P. J. Woods, B. Fernández-Domínguez, F. Käppeler, L. Cosentino, Hideo Harada, A. Musumarra, G. Vannini, I. Knapova, M. Mastromarco, N. Patronis, E. Jericha, A. K. Saxena, A. Oprea, Pedro G. Ferreira, Mario Barbagallo, Arnaud Ferrari, Anton Wallner, Paolo Finocchiaro, M. Krtička, F. Mingrone, Dorothea Schumann, J. Balibrea, T. Martinez, I. F. Gonçalves, J. A. Ryan, J. Billowes, S. Valenta, C. Lederer, V. Furman, T. J. Wright, A. Masi, P. Vaz, D. G. Jenkins, A. G. Smith, F. Gunsing, J. Marganiec, Colonna, Emilio Andrea Maugeri, A. S. Brown, A. Manna, N. V. Sosnin, M. Kokkoris, M. Caamaño, Cristian Massimi, Kathrin Göbel, Annamaria Mazzone, Petar Žugec, Rugard Dressler, Alberto Ventura, G. Tagliente, E. Chiaveri, D. Cano-Ott, P. F. Mastinu, J. Andrzejewski, M. Diakaki, P. M. Milazzo, Jan Heyse, F. Calviño, H. Leeb, O. Aberle, D. Bosnar, J. Perkowski, V. Vlachoudis, A. Casanovas, C. Rubbia, C. Weiss, L. Audouin, Ignacio Porras, M. Bacak, R. Vlastou, G. Cortes, D. Radeck, E. Berthoumieux, F. Bečvář, A. Kalamara, S. Heinitz, J. L. Tain, E. Mendoza, A. Pavlik, Niko Kivel, C. Domingo-Pardo, Peter Schillebeeckx, S. Warren, V. Variale, Ariel Tarifeño-Saldivia, S. J. Lonsdale, F. Cerutti, Simone Gilardoni, R. Cardella, E. Leal-Cidoncha, Javier Praena, S. Lo Meo, P. Kavrigin, A. Gawlik, Thomas Rauscher, Ralf Nolte, E. Griesmayer, L. A. Damone, E. González-Romero, A. Mengoni, M. Aiche, I. Duran, A. R. García, T. Glodariu, D. Macina, Carlos Guerrero, J. Taieb, Deniz Kurtulgil, P. V. Sedyshev, A. Stamatopoulos, G. Bélier, E. Dupont, M. Sabaté-Gilarte, 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, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CEA Cadarache, 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, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, Coupling, Fissile material, 010308 nuclear & particles physics, Fission, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Analytical chemistry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Calorimeter, Neutron capture, Cross section (physics), 0103 physical sciences, Nuclear Physics - Experiment, Nuclear Experiment, 010306 general physics, Absorption (electromagnetic radiation), n_TOF, 233U, alpha-ratio, neutron time of flight, Order of magnitude
Abstract

This work was partially supported by the French NEEDS/NACRE Project and by the European Commission within HORIZON2020 via the EURATOM Project EUFRAT. The authors would like to acknowledge more specifically JRC Geel for targets preparation and for providing full support for a first test measurement of the fission chamber at GELINA., U-233 is the fissile nuclei in the Th-U fuel cycle with a particularily small neutron capture cross setion which is on average about one order of magnitude lower than its fission cross section. Hence, the measurement of the U-233(n,gamma) cross section relies on a method to accurately distinguish between capture and fission gamma-rays. A measurement of the U-233 alpha-ratio has been performed at the n_TOF facility at CERN using a so-called fission tagging setup, coupling nTOF 's Total Absorption Calorimeter with a novel fission chamber to tag the fission gamma-rays. The experimental setup is described and essential parts of the analysis are discussed. Finally, a preliminary U-233 alpha-ratio is presented., French NEEDS/NACRE Project, European Commission within HORIZON2020 via the EURATOM Project EUFRAT

Published
2020

25. Preliminary results on the $^{233}U$ capture cross section and alpha ratio measured at n_TOF (CERN) with the fission tagging technique

Author

A. S. Brown, M. Krtička, F. Calviño, H. Leeb, J. Perkowski, T. Martinez, Rene Reifarth, J. M. Quesada, L. Tassan-Got, Pedro G. Ferreira, M. Sabaté-Gilarte, P. M. Milazzo, F. Gunsing, J. Marganiec, A. Pavlik, C. Domingo-Pardo, Cristian Massimi, L. Audouin, M. Bacak, L. Cosentino, B. Laurent, D. Cano-Ott, M. Diakaki, A. Musumarra, C. Rubbia, A. Kimura, T. Glodariu, E. Chiaveri, O. Serot, Stefan Kopecky, P. F. Mastinu, F. Cerutti, S. Warren, A. Oprea, E. Jericha, I. Knapova, Paolo Finocchiaro, G. Bélier, P. Vaz, R. Vlastou, D. Radeck, Dorothea Schumann, S. Heinitz, Mario Barbagallo, Rugard Dressler, J. A. Ryan, E. Berthoumieux, V. Variale, M. Mastromarco, A. Kalamara, Alberto Ventura, D. Macina, Ariel Tarifeño-Saldivia, S. J. Lonsdale, F. Mingrone, Carlos Guerrero, C. Lederer, M. A. Cortés-Giraldo, Anton Wallner, L. Mathieu, Ignacio Porras, Simone Gilardoni, Nicola Colonna, D. Bosnar, J. Balibrea, J. Taieb, E. Dupont, Vasilis Vlachoudis, A. Manna, F. Bečvář, Emilio Andrea Maugeri, G. Tagliente, J. Lerendegui-Marco, E. Mendoza, R. Cardella, V. Furman, I. F. Gonçalves, T. J. Wright, C. Weiss, M. Kokkoris, Peter Schillebeeckx, N. V. Sosnin, Annamaria Mazzone, O. Aberle, A. Casanovas, Kathrin Göbel, Petar Žugec, S. Valenta, Y. H. Chen, Hideo Harada, J. L. Tain, A. Masi, Jan Heyse, Javier Praena, S. Lo Meo, D. G. Jenkins, Niko Kivel, Deniz Kurtulgil, N. Patronis, P. V. Sedyshev, A. K. Saxena, Arnaud Ferrari, A. Stamatopoulos, J. Billowes, Marco Calviani, A. G. Smith, Alexandru Negret, B. Fernández-Domínguez, F. Käppeler, Philip Woods, E. Leal-Cidoncha, Y. Kadi, A. Gawlik, Thomas Rauscher, G. Vannini, M. Caamaño, J. Andrzejewski, G. Cortes, E. González-Romero, A. Mengoni, M. Aiche, I. Duran, P. Kavrigin, Ralf Nolte, E. Griesmayer, L. A. Damone, A. R. García, 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris-Saclay, Université de Bordeaux (UB), CEA Cadarache, 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), Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11), 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, 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), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Serot, O., and Chebboubi, A.

Subjects
Nuclear reaction, Fission, Physics::Instrumentation and Detectors, QC1-999, Nuclear physics, 01 natural sciences, 7. Clean energy, 0103 physical sciences, CERN, Neutron, n_TOF, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, [PHYS]Physics [physics], Large Hadron Collider, Fissile material, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, Calorimeter, Neutron capture, n_TOF, 233U, neutron capture, alpha ratio, fission tagging, Ionization chamber, Física nuclear, Other
Abstract

233U is of key importance among the fissile nuclei in the Th-U fuel cycle. A particularity of 233U is its small neutron capture cross-section, which is on average about one order of magnitude lower than the fission cross-section. The accuracy in the measurement of the 233U capture cross-section depends crucially on an efficient capture-fission discrimination, thus a combined set-up of fission and γ-detectors is needed. A measurement of the 233U capture cross-section and capture-to-fission ratio was performed at the CERN n_TOF facility. The Total Absorption Calorimeter (TAC) of n_TOF was employed as γ-detector coupled with a novel compact ionization chamber as fission detector. A brief description of the experimental set-up will be given, and essential parts of the analysis procedure as well as the preliminary response of the set-up to capture are presented and discussed.

Published
2018

26. 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

27. $^{7}$ 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

28. 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

29. 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

30. Radiative neutron capture on Pu242 in the resonance region at the CERN n_TOF-EAR1 facility

Author

Tanja Heftrich, A. Mengoni, E. Leal-Cidoncha, Thomas Rauscher, A. Riego-Perez, E. González-Romero, L. Audouin, V. Bécares, V. Ketlerov, G. Vannini, A. G. Smith, N. Patronis, A. K. Saxena, I. Duran, M. Mirea, A. R. García, Arnaud Ferrari, D. M. Castelluccio, M. Brugger, Damir Bosnar, Y. Kadi, M. Caamaño, C. Beinrucker, S. Valenta, Rugard Dressler, Marco Calviani, C. Weiss, A. Kimura, E. Chiaveri, Rene Reifarth, Luigi Cosentino, C. Lederer, P. F. Mastinu, A. Tsinganis, F. Calviño, P. Kavrigin, Jan Heyse, Emilio Andrea Maugeri, Stefan Schmidt, S. Montesano, G. Tagliente, A. Oprea, D. G. Jenkins, H. Leeb, Nicola Colonna, B. Fernández-Domínguez, F. Käppeler, Vasilis Vlachoudis, J. M. Quesada, L. Tassan-Got, J. Perkowski, J. Marganiec, R. Cardella, O. Aberle, M. A. Cortés-Giraldo, A. Pavlik, M. Bacak, C. Domingo-Pardo, M. Sabaté-Gilarte, J. I. Porras, T. Glodariu, Roberto Losito, A. Stamatopoulos, M. Kokkoris, J. Andrzejewski, Ralf Nolte, G. Cortes, P. J. Woods, Mario Barbagallo, V. Khryachkov, P. M. Milazzo, K. Rajeev, E. Griesmayer, J. Billowes, S. Warren, L. A. Damone, Javier Praena, S. Lo Meo, Hideo Harada, V. Variale, Francesca Matteucci, M. Krtička, Arnd R. Junghans, D. Macina, P. Vaz, Carlos Guerrero, T. Martinez, Mario Weigand, A. Casanovas, D. Cano-Ott, M. Diakaki, M. Mastromarco, Y. H. Chen, S. J. Lonsdale, Ariel Tarifeño-Saldivia, P. C. Rout, K. Göbel, F. Cerutti, Anton Wallner, F. Mingrone, J. Balibrea, M. Dietz, F. Bečvář, F. Gunsing, C. Wolf, E. Mendoza, A. Goverdovski, S. Heinitz, Peter Schillebeeckx, Cristian Massimi, S. Barros, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, P. Ferreira, Tatsuya Katabuchi, A. Ventura, J. A. Ryan, J. Lerendegui-Marco, P. V. Sedyshev, I. F. Gonçalves, E. Dupont, J. L. Tain, Niko Kivel, C. Rubbia, A. Gawlik, V. Furman, Klaus Eberhardt, T. J. Wright, Petar Žugec, R. Vlastou, E. Berthoumieux, and A. Musumarra

Subjects
Physics, Nuclear fuel, Fissile material, 010308 nuclear & particles physics, chemistry.chemical_element, Uranium, 01 natural sciences, 7. Clean energy, Spent nuclear fuel, Neutron temperature, Nuclear physics, Neutron capture, chemistry, 13. Climate action, 0103 physical sciences, Neutron, 010306 general physics, MOX fuel
Abstract

The spent fuel of current nuclear reactors contains fissile plutonium isotopes that can be combined with uranium to make mixed oxide (MOX) fuel. In this way the Pu from spent fuel is used in a new reactor cycle, contributing to the long-term sustainability of nuclear energy. However, an extensive use of MOX fuels, in particular in fast reactors, requires more accurate capture and fission cross sections for some Pu isotopes. In the case of Pu242 there are sizable discrepancies among the existing capture cross-section measurements included in the evaluations (all from the 1970s) resulting in an uncertainty as high as 35% in the fast energy region. Moreover, postirradiation experiments evaluated with JEFF-3.1 indicate an overestimation of 14% in the capture cross section in the fast neutron energy region. In this context, the Nuclear Energy Agency (NEA) requested an accuracy of 8% in this cross section in the energy region between 500 meV and 500 keV. This paper presents a new time-of-flight capture measurement on Pu242 carried out at n-TOF-EAR1 (CERN), focusing on the analysis and statistical properties of the resonance region, below 4 keV. The Pu242(n,γ) reaction on a sample containing 95(4) mg enriched to 99.959% was measured with an array of four C6D6 detectors and applying the total energy detection technique. The high neutron energy resolution of n-TOF-EAR1 and the good statistics accumulated have allowed us to extend the resonance analysis up to 4 keV, obtaining new individual and average resonance parameters from a capture cross section featuring a systematic uncertainty of 5%, fulfilling the request of the NEA.

Published
2018

31. Experimental setup and procedure for the measurement of the $^7$Be(n,p)$^7$Li reaction at n_TOF

Author

A. Oprea, M. Krtička, J. Heyse, P. Ferreira, G. Bellia, T. Martinez, A. Musumarra, G. Cortes, M. Sabaté-Gilarte, G. Tagliente, J. Billowes, M. S. Robles, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Diakaki, G. Vannini, Alexandru Negret, Juliana Schell, F. Käppeler, R. Nolte, Y. H. Chen, S. Heinitz, Karl Johnston, F. Mingrone, J. Andrzejewski, Carlo Rubbia, V. Vlachoudis, A. Casanovas, M. Bacak, Alfredo Ferrari, E. A. Maugeri, S. Warren, V. Variale, D. Radeck, E. Berthoumieux, M. Mastromarco, C. Lederer, Carlos Guerrero, K. Göbel, E. Mendoza, P. Kavrigin, J. Lerendegui-Marco, A. Manna, V. Furman, Anton Wallner, I. F. Gonçalves, N. V. Sosnin, N. Kivel, A. Kalamara, J. Balibrea, F. Gunsing, E. Griesmayer, L. A. Damone, E. Jericha, T. Glodariu, Paolo Finocchiaro, Annamaria Mazzone, Petar Žugec, Nicola Colonna, A. Kimura, T. Wright, J. A. Ryan, A. Masi, E. Dupont, P. M. Milazzo, L. Audouin, D. G. Jenkins, A. S. Brown, J. Marganiec, I. Duran, Maurizio Piscopo, L. Cosentino, P. F. Mastinu, I. Porras, A. Saxena, Cristian Massimi, R. Dressler, M. A. Cortés-Giraldo, Deniz Kurtulgil, P. Schillebeeckx, P. V. Sedyshev, Mario Barbagallo, D. Schumann, Hideo Harada, E. Leal-Cidoncha, A. Gawlik, C. Weiss, R. Vlastou, Thomas Rauscher, B. Fernández-Domínguez, Damir Bosnar, Y. Kadi, N. Patronis, S. Valenta, E. González-Romero, Marco Calviani, A. G. Smith, M. Dietz, Philip Woods, J. L. Tain, A. R. García, A. Stamatopoulos, M. Kokkoris, F. Bečvář, Alfio Pappalardo, Alberto Mengoni, F. Calviño, H. Leeb, D. Macina, J. Perkowski, O. Aberle, P. Vaz, Alberto Ventura, Rene Reifarth, E. Chiaveri, J. M. Quesada, L. Tassan-Got, D. Cano-Ott, Sergio Cristallo, A. Pavlik, C. Domingo-Pardo, S. Amaducci, J. G. Martins-Correia, Javier Praena, S. Lo Meo, M. Caamaño, F. Cerutti, Simone Gilardoni, R. Cardella, 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), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), 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 ), 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 ), Laboratoire AIM, Université Paris Diderot - Paris 7 ( UPD7 ) -Centre d'Etudes de Saclay, 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Mengoni, A., Lo Meo, S., Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Barbagallo, M., Andrzejewski, J., Mastromarco, M., Perkowski, J., Damone, L.A., Gawlik, A., Cosentino, L., Finocchiaro, P., Maugeri, E.A., Mazzone, A., Dressler, R., Heinitz, S., Kivel, N., Schumann, D., Colonna, N., Aberle, O., Amaducci, S., Audouin, L., Bacak, M., Balibrea, J., Bečvář, F., Bellia, G., 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., Cristallo, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Furman, V., Göbel, K., García, A.R., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heyse, J., Jenkins, D.G., Jericha, E., Johnston, K., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Lonsdale, S.J., Macina, D., Manna, A., Marganiec, J., Martínez, T., Martins-Correia, J.G., Masi, A., Massimi, C., Mastinu, P., Mendoza, E., Milazzo, P.M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Pappalardo, A.D., Patronis, N., Pavlik, A., Piscopo, M., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Rauscher, T., Reifarth, R., Robles, M.S., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Sedyshev, P., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., 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., 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
Physics - Instrumentation and Detectors, Nuclear physics, OUTLOOK, 01 natural sciences, 7. Clean energy, Particle identification, p) 7Li reaction, CERN, Detectors and Experimental Techniques, Nuclear Experiment, Instrumentation, physics.ins-det, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 7Be(n,p)7 Li reaction, 7Be(n,p) 7Li reaction, Big bang nucleosynthesis, Cosmological Lithium problem, n_TOF spallation neutron source, Nuclear and High Energy Physics, Instrumentation, Physics, Large Hadron Collider, Cross section, 7Be(n, Big bang nucleosynthesis, Detector, Instrumentation and Detectors (physics.ins-det), Charged particle, PRIRODNE ZNANOSTI. Fizika, Cosmological Lithium problem, Big bang nucleosynthesis, 7Be(n, p)7Li reaction, n_TOF spallation neutron source, Cardinal point, Big bang nucleosynthesi, Física nuclear, p) 7 Li reaction, CROSS-SECTION, Cosmological Lithium problem, Spallation Neutron Source, n_TOF spallation neutron source, 7Be(n,p) 7Li reaction, Nuclear and High Energy Physics, nTOF, FOS: Physical sciences, Be-7(n,p)Li-7 reaction, 7Be(n,p)7Li reaction, 0103 physical sciences, Neutron, FACILITY, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear and High Energy Physic, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, p)7Li reaction, Neutron radiation, NATURAL SCIENCES. Physics, 7 Be(n, NEUTRON
Abstract

Following the completion of the second neutron beam line and the related experimental area (EAR2) at the n_TOF spallation neutron source at CERN, several experiments were planned and performed. The high instantaneous neutron flux available in EAR2 allows to investigate neutron indiced reactions with charged particles in the exit channel even employing targets made out of small amounts of short-lived radioactive isotopes. After the successful measurement of the 7Be(n,{\alpha}){\alpha} cross section, the 7Be(n,p)7Li reaction was studied in order to provide still missing cross section data of relevance for Big Bang Nucleosynthesis (BBN), in an attempt to find a solution to the cosmological Lithium abundance problem. This paper describes the experimental setup employed in such a measurement and its characterization., The authors are grateful to Carmelo Marchetta (INFN-LNS) for the production of the 6LiF test target. This research was partially funded by the European Atomic Energy Community (Euratom) Seventh Framework Programme FP7/2007- 2011 under the Project CHANDA (Grant No. 605203). We acknowledge the support of the Narodowe Centrum Nauki (NCN) under the grant UMO-2012/04/M/ST2/00700-UMO-2016/22/M/ST2/00183, and of the Croatian Science Foundation under project HRZZ 1680.

Published
2018

32. 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

33. Measurement of the U238(n,γ) cross section up to 80 keV with the Total Absorption Calorimeter at the CERN n_TOF facility

Author

M. P. W. Chin, F. Roman, A. R. García, M. Brugger, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, E. González-Romero, Rene Reifarth, F. Käppeler, M. S. Robles, G. Cortes, F. Gunsing, D. Tarrío, G. Tagliente, Furman, Cristian Massimi, P. Gurusamy, Srinivasan Ganesan, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Javier Praena, D. Cano-Ott, M. Diakaki, M. Mirea, A. Manousos, G. Vannini, J. Marganiec, M. Krtička, F. Calviño, C. Carrapiço, H. Leeb, A. K. Saxena, T. Martinez, J. Perkowski, Tanja Heftrich, Tatsuya Katabuchi, A. Ventura, Arnaud Ferrari, J. Billowes, A. Riego-Perez, F. Cerutti, M. A. Cortés-Giraldo, Mario Weigand, E. Chiaveri, M. Kokkoris, P. Vaz, P. F. Mastinu, E. Jericha, Variale, N. Colonna, C. Weiss, C. Paradela, D. Bosnar, Dorothea Schumann, L. Audouin, J. A. Ryan, Massimo Barbagallo, T. J. Wright, Anton Wallner, Christoph Langer, Ketlerov, Khryachkov, A. Hernández-Prieto, S. Valenta, Petar Žugec, C. Lampoudis, A. Pavlik, Marco Calviani, C. Domingo-Pardo, M. Dietz, M. Sabaté-Gilarte, K. Fraval, Jeri Kroll, Roberto Losito, R. Sarmento, G. Giubrone, Y. Kadi, Bécares, A. Tsinganis, D. G. Jenkins, L.S. Leong, Ariel Tarifeño-Saldivia, J. Lerendegui-Marco, P. M. Milazzo, Carlos Guerrero, I. F. Gonçalves, Fabio Belloni, M. J. Vermeulen, P. V. Sedyshev, R. Vlastou, E. Berthoumieux, S. Altstadt, F. Bečvář, E. Mendoza, Peter Schillebeeckx, N. Dzysiuk, Roberto Versaci, P. E. Koehler, I. Duran, T. Ware, E. Griesmayer, J. L. Tain, C. Rubbia, Vlachoudis, M. B. Gomez-Hornillos, J. Andrzejewski, A. Goverdovski, F. Mingrone, C. Lederer, and A. Mengoni

Subjects
Physics, Background subtraction, Range (particle radiation), Large Hadron Collider, 010308 nuclear & particles physics, 01 natural sciences, Neutron temperature, Calorimeter, Nuclear physics, Cross section (physics), 0103 physical sciences, Neutron, 010306 general physics, Absorption (electromagnetic radiation)
Abstract

The radiative capture cross section of a highly pure (99.999%), 6.125(2) grams and 9.56(5) 10-4 atoms/barn areal density 238-U sample has been measured with the Total Absorption Calorimeter (TAC) in the 185 m flight path at the CERN neutron time-of-flight facility n_TOF. This measurement is in response to the NEA High Priority Request list, which demands an accuracy in this cross section of less than 3% below 25 keV. These data have undergone careful background subtraction, with special care being given to the background originating from neutrons scattered by the 238-U sample. Pileup and dead-time effects have been corrected for. The measured cross section covers an energy range between 0.2 eV and 80 keV, with an accuracy that varies with neutron energy, being better than 4% below 25 keV and reaching at most 6% at higher energies.

Published
2017

34. The Fission Programme at the CERN n_TOF Facility

Author

Marco Calviani, I. Duran, E. Chiaveri, Mario Barbagallo, Carlos Guerrero, D. Tarrío, F. Gunsing, M. Diakaki, E. Leal-Cidoncha, L. Tassan-Got, C. Paradela, R. Vlastou, E. Berthoumieux, A. Tsinganis, Nicola Colonna, and L.S. Leong

Subjects
Physics, Fission, Nuclear Theory, Radioactive waste, MicroMegas detector, Actinide, Physics and Astronomy(all), time-of-flight, Nuclear physics, Nuclear technology, Neutron capture, FIC, Neutron flux, Nuclear astrophysics, fission, n_TOF, Nuclear Physics - Experiment, Nuclear Experiment, PPAC, FFAD, Micromegas
Abstract

Since 2001, the scientific programme of the CERN n_TOF facility has focused mainly on the study of radiative neutron capture reactions, which are of great interest to nuclear astrophysics and on neutron-induced fission reactions, which are of relevance for nuclear technology, as well as essential for the development of theoretical models of fission. In particular, taking advantage of the high instantaneous neutron flux and high energy resolution of the facility, as well as of high-performance detection and acquisition systems, accurate new measurements on several long-lived major and minor actinides, from 232 Th to 245 Cm, have been performed so far. Data on these isotopes are needed in order to improve the safety and efficiency of conventional reactors, as well as to develop new systems for nuclear energy production and treatment of nuclear waste, such as Generation IV reactors, Accelerator Driven Systems and reactors based on innovative fuel cycles. A review of the most important results on fission cross-sections and fragment properties obtained at n_TOF for a variety of (radioactive) isotopes is presented along with the perspectives arising from the coming on line in the second half of 2014 of a new 19 m flight-path, which will allow n_TOF to expand its measurement capabilities to even more rare or short-lived isotopes, such as 230 Th, 232 U, 238,240 Pu and 244 Cm.

Published
2015
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35. First Measurement of $^{72}$Ge$(n,γ)$ at n_TOF

Author

R. Vlastou, D. Radeck, E. Berthoumieux, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, A. Mengoni, V. Furman, T. J. Wright, M. Mastromarco, J. Andrzejewski, M. Krtička, G. Cortes, A. Oprea, A. Musumarra, J. Lerendegui-Marco, E. Leal-Cidoncha, F. Bečvář, S. Warren, Anton Wallner, J. Balibrea, I. F. Gonçalves, T. Martinez, E. Jericha, Alexandru Negret, Javier Praena, S. Lo Meo, D. Bosnar, M. Bacak, Paolo Finocchiaro, F. Calviño, E. Mendoza, V. Variale, P. Kavrigin, A. Gawlik, A. Kimura, Thomas Rauscher, Dorothea Schumann, H. Leeb, G. Tagliente, J. A. Ryan, Claudia Lederer-Woods, Ralf Nolte, J. Perkowski, D. Kahl, Peter Schillebeeckx, B. Fernández-Domínguez, F. Käppeler, S. Heinitz, Y. H. Chen, Ignacio Porras, A. Stamatopoulos, O. Aberle, E. Griesmayer, A. Casanovas, Mario Barbagallo, F. Gunsing, Deniz Kurtulgil, Y. Kadi, T. Glodariu, E. González-Romero, F. Cerutti, L. Cosentino, P. V. Sedyshev, A. Masi, L. A. Damone, Cristian Massimi, D. G. Jenkins, Simone Gilardoni, A. R. García, Rugard Dressler, A. S. Brown, C. Rubbia, I. Duran, S. Valenta, R. Cardella, D. Cano-Ott, J. Marganiec, M. Diakaki, F. Mingrone, G. Vannini, D. Macina, Marco Calviani, M. A. Cortés-Giraldo, M. Sabateé-Gilarte, Carlos Guerrero, A. G. Smith, E. Chiaveri, P. M. Milazzo, Nicola Colonna, P. F. Mastinu, M. Dietz, L. Audouin, J. L. Tain, E. Dupont, R. Garg, M. Caamaño, Vasilis Vlachoudis, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Niko Kivel, Rene Reifarth, P. Vaz, Pedro G. Ferreira, Alberto Ventura, C. Weiss, J. M. Quesada, L. Tassan-Got, A. Pavlik, C. Domingo-Pardo, Hideo Harada, Kathrin Göbel, Jan Heyse, P. J. Woods, N. Patronis, A. K. Saxena, Arnaud Ferrari, J. Billowes, A. Kalamara, Emilio Andrea Maugeri, M. Kokkoris, 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, 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, Dietz, M., Lederer-Woods, C., 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., 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-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Garg, R., Gawlik, A., Gilardoni, S., Glodariu, T., Goncalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kahl, D., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., 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, Sabateé-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., 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., and Žugec, P.

Subjects
Nuclear reaction, QC1-999, Nuclear physics, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nucleosynthesis, Nuclear Astrophysics, 0103 physical sciences, Nuclear astrophysics, Nuclear Physics - Experiment, n_TOF, 010306 general physics, Nuclear Experiment, 010303 astronomy & astrophysics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Physics, Física [Àrees temàtiques de la UPC], Cross section, Isotope, Stable isotope ratio, Liquid scintillation counting, Neutron capture, neutron capture, 72Ge, n_TOF, Física nuclear, Nucleosíntesi
Abstract

The slow neutron capture process (s-process) is responsible for producing about half of the elemental abundances heavier than iron in the universe. Neutron capture cross sections on stable isotopes are a key nuclear physics input for s-process studies. The 72Ge(n, γ) cross section has an important influence on production of isotopes between Ge and Zr during s-process in massive stars and therefore experimental data are urgently required. 72Ge(n, γ) was measured at the neutron time-of-flight facility n_TOF (CERN) for the first time at stellar energies. The measurement was performed using an enriched 72GeO2 sample at a flight path of 185m with a set of liquid scintillation detectors (C6D6). The motivation, experiment and current status of the data analysis are reported.

Published
2017

36. Neutron capture cross section measurement ofU238at the CERN n_TOF facility in the energy region from 1 eV to 700 keV

Author

A. Pavlik, C. Domingo-Pardo, J. Marganiec, M. Sabaté-Gilarte, Javier Praena, S. Lo Meo, P. F. Mastinu, L. S. Leong, S. Valenta, P. M. Milazzo, A. K. Saxena, C. Lampoudis, I. F. Gonçalves, J. L. Tain, Marco Calviani, M. Mirea, C. Lederer, E. Chiaveri, D. Cano-Ott, F. Bečvář, M. Mastromarco, F. Gunsing, M. A. Cortés-Giraldo, T. Wright, M. P. W. Chin, Jeri Kroll, E. Jericha, R. Sarmento, F. Mingrone, P. Vaz, C. Weiß, A. Hernández-Prieto, J. Andrzejewski, R. Losito, Carlo Rubbia, S. Schmidt, A. J. M. Plompen, F. Cerutti, A. Riego, Alberto Ventura, Anton Wallner, Alfredo Ferrari, E. Berthoumieux, Cristian Massimi, Srinivasan Ganesan, T. Ware, A. Manousos, F. Käppeler, C. Paradela, Alberto Mengoni, S. Altstadt, R. Vlastou, M. Kokkoris, N. Kivel, E. Griesmayer, E. Leal-Cidoncha, K. Fraval, Damir Bosnar, Petar Žugec, Y. Kadi, V. Bécares, Carlos Guerrero, Mario Barbagallo, C. Eleftheriadis, D. Schumann, M. Krtička, F. Calviño, Thomas Rauscher, T. Martinez, P. Schillebeeckx, D. G. Jenkins, P. E. Koehler, J. Billowes, G. Tagliente, D. Karadimos, Christoph Langer, A. Tsinganis, W. Mondalaers, E. González-Romero, M. S. Robles, Nicola Colonna, G. Giubrone, A. R. García, Vasilis Vlachoudis, M. Brugger, M. Diakaki, I. Duran, G. Cortes, D. Tarrío, R. Dressler, M. J. Vermeulen, H. Leeb, V. Variale, J. Perkowski, A. Mallick, G. Vannini, M. Weigand, F. Belloni, C. Carrapiço, E. Mendoza, Rene Reifarth, J. M. Quesada, L. Tassan-Got, and L. Audouin

Subjects
Physics, 010308 nuclear & particles physics, Gamma ray, Nuclear data, Scintillator, 7. Clean energy, 01 natural sciences, Resonance (particle physics), Nuclear physics, Neutron capture, Nuclear reactor core, 0103 physical sciences, Neutron cross section, Neutron, 010306 general physics
Abstract

The aim of this work is to provide a precise and accurate measurement of the U238(n,γ) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing the behavior of the reactor core. In particular, fast reactors, which are experiencing a growing interest for their ability to burn radioactive waste, operate in the high energy region of the neutron spectrum. In this energy region most recent evaluations disagree due to inconsistencies in the existing measurements of up to 15%. In addition, the assessment of nuclear data uncertainty performed for innovative reactor systems shows that the uncertainty in the radiative capture cross section of U238 should be further reduced to 1-3% in the energy region from 20 eV to 25 keV. To this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data need, complementary experiments, one at the GELINA and two at the n-TOF facility, were proposed and carried out within the 7th Framework Project ANDES of the European Commission. The results of one of these U238(n,γ) measurements performed at the n-TOF CERN facility are presented in this work. The γ-ray cascade following the radiative neutron capture has been detected exploiting a setup of two C6D6 liquid scintillators. Resonance parameters obtained from this work are on average in excellent agreement with the ones reported in evaluated libraries. In the unresolved resonance region, this work yields a cross section in agreement with evaluated libraries up to 80 keV, while for higher energies our results are significantly higher.

Published
2017

37. 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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38. 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

39. 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

40. 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

41. 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

42. 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

43. New measurement of the 242Pu(n,γ) cross section at n-TOF-EAR1 for MOX fuels: Preliminary results in the RRR

Author

Simone Gilardoni, P. C. Rout, Ignacio Porras, Rene Reifarth, J. Billowes, C. Lederer, E. Leal-Cidoncha, J. M. Quesada, L. Tassan-Got, A. Gawlik, Thomas Rauscher, R. Cardella, P. Vaz, P. Schillebeeckx, M. Diakaki, A. Casanovas, Alberto Ventura, A. Mengoni, M. Kokkoris, Hideo Harada, J. Marganiec, G. Vannini, M. Caamaño, A. Oprea, J. Heyse, N. Patronis, L. Cosentino, M. Sabaté-Gilarte, S. Warren, E. A. Maugeri, A. Pavlik, M. A. Cortés-Giraldo, C. Domingo-Pardo, F. Cerutti, Ariel Tarifeño-Saldivia, S. J. Lonsdale, E. Mendoza, E. Jericha, R. Nolte, S. Valenta, P. F. Mastinu, T. Glodariu, J. Lerendegui-Marco, V. Variale, Arnd R. Junghans, A. R. García, Paolo Finocchiaro, Marco Calviani, A. Kimura, J. A. Ryan, A. Saxena, A. G. Smith, P. M. Milazzo, I. F. Gonçalves, M. Mastromarco, Philip Woods, F. Calviño, H. Leeb, A. S. Brown, Anton Wallner, R. Vlastou, J. Perkowski, M. B. Gómez-Hornillos, I. Duran, Javier Praena, S. Lo Meo, F. Gunsing, P. Ferreira, Y. H. Chen, Mario Barbagallo, D. Schumann, F. Mingrone, J. Andrzejewski, J. Balibrea, E. Chiaveri, A. Masi, G. Tagliente, S. Heinitz, Damir Bosnar, D. Cano-Ott, Carlo Rubbia, G. Cortes, Cristian Massimi, A. Stamatopoulos, Y. Kadi, D. G. Jenkins, K. Göbel, R. Dressler, V. Vlachoudis, D. Macina, P. Kavrigin, Alfredo Ferrari, E. González, T. Wright, E. Griesmayer, L. A. Damone, M. Krtička, O. Aberle, T. Martinez, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, B. Fernández-Domínguez, J. L. Tain, Alexandru Negret, F. Käppeler, N. Kivel, Klaus Eberhardt, D. Radeck, E. Berthoumieux, L. Audouin, A. Kalamara, A. Musumarra, Deniz Kurtulgil, Nicola Colonna, Carlos Guerrero, E. Dupont, F. Bečvář, M. Bacak, 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., 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, Ministerio de Economía y Competitividad (MINECO). España, Lerendegui-Marco, J., Guerrero, C., Cortés-Giraldo, M.A., Quesada, J.M., Mendoza, E., Cano-Ott, D., Eberhardt, K., Junghans, A., 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., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., 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., Gómez-Hornillos, M.B., García, A.R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González, E., Griesmayer, E., 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., 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., 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., Schumann, D., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Woods, P.J., Wright, T., Ž Ugec, P., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, 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, QC1-999, Nuclear engineering, Context (language use), CERN nTOF, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Physics and Astronomy (all), Nuclear reactors, Reactors nuclears, 0103 physical sciences, CERN, Neutron cross section, Nuclear Physics - Experiment, ddc:530, 242Pu neutron capture, 010306 general physics, MOX fuel, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Fissile material, Cross section, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Physics, Spent nuclear fuel, Neutron temperature, 13. Climate action, neutron time-of-flight measurement
Abstract

The spent fuel of current nuclear reactors contains fissile plutonium isotopes that can be combined with 238U to make mixed oxide (MOX) fuel. In this way the Pu from spent fuel is used in a new reactor cycle, contributing to the long-term sustainability of nuclear energy. The use of MOX fuels in thermal and fast reactors requires accurate capture and fission cross sections. For the particular case of 242Pu, the previous neutron capture cross section measurements were made in the 70’s, providing an uncertainty of about 35% in the keV region. In this context, the Nuclear Energy Agency recommends in its “High Priority Request List” and its report WPEC-26 that the capture cross section of 242Pu should be measured with an accuracy of at least 7–12% in the neutron energy range between 500 eV and 500 keV. This work presents a brief description of the measurement performed at n TOF-EAR1, the data reduction process and the first ToF capture measurement on this isotope in the last 40 years, providing preliminary individual resonance parameters beyond the current energy limits in the evaluations, as well as a preliminary set of average resonance parameters., This measurement has received funding from the EC FP7 Programme under the projects NEUTANDALUS (Grant No. 334315) and CHANDA (Grant No. 605203), and the Spanish Ministry of Economy and Competitiveness projects FPA2013- 45083-P and FPA2014-53290-C2-2-P.

Published
2017

44. 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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45. 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

46. 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

47. Fission Activities at the CERN n_TOF Facility

Author

F. Gunsing, A. Stamatopoulos, M. Diakaki, Y. Chen, M. Mastromarco, E. Leal-Cidoncha, L. Tassan-Got, Diego Tarrio, Marco Calviani, I. Duran, A. G. Smith, Carlos Guerrero, C. Paradela, L. Audouin, T. J. Wright, R. Vlastou, E. Berthoumieux, M. Bacak, A. Tsinganis, Nicola Colonna, L.S. Leong, E. Dupont, 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
Nuclear physics, Physics, Fission Cross Section, Nuclear technology, Large Hadron Collider, Fission, Fission Fragments, n_TOF Facility, Nuclear Theory, Physics::Accelerator Physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; A major part of the scientific program of the CERN n_TOF facility involves the study of neutron-induced fission reactions, which is essential for nuclear technology, as well as for the development of the theoretical models of fission. An overview of the fission studies performed and the corresponding detection systems is given, with a short description of the latest highlights.

Published
2016

48. 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

49. Be7(n,α)He4Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN

Author

D. Macina, Carlos Guerrero, M. Sabaté-Gilarte, Rugard Dressler, P. C. Rout, C. Rubbia, W.I. Furman, P. V. Sedyshev, Y. H. Chen, A. Kimura, L. Cosentino, Srinivasan Ganesan, M. Mastromarco, A. Tsinganis, G. Vannini, A. García-Rios, F. Mingrone, C. Lederer, Anton Wallner, Nicola Colonna, J. Andrzejewski, M. Caamaño, A. Casanovas, Mario Barbagallo, Vasilis Vlachoudis, G. Cortes, M. Krtička, P. Kavrigin, N. Patronis, A. K. Saxena, Ralf Nolte, H. Leeb, Arnaud Ferrari, Ignacio Porras, Damir Bosnar, A. Oprea, T. Martinez, Mario Weigand, A. Stamatopoulos, E. Griesmayer, J. Billowes, L. A. Damone, Hideo Harada, M. Mirea, P. Ferreira, M. A. Cortés-Giraldo, S. Montesano, D. Cano-Ott, F. Calviño, R. Cardella, J. Perkowski, J. Vollaire, E. A. Maugeri, F. Gunsing, J. Balibrea-Correa, G. Tagliente, Javier Praena, S. Lo Meo, Cristian Massimi, M. Kokkoris, O. Aberle, E. Jericha, F. Bečvář, Pierfrancesco Mastinu, T. Glodariu, Paolo Finocchiaro, M. Piscopo, M. Bacak, Dorothea Schumann, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. A. Ryan, E. Mendoza, D. G. Jenkins, E. Leal-Cidoncha, I. Duran, M. Diakaki, P. Vaz, C. Weiß, Roberto Losito, Peter Schillebeeckx, A. Gawlik, Thomas Rauscher, K. Rajeev, P. M. Milazzo, J. Marganiec, F. Cerutti, E. Chiaveri, C. Beinrucker, A. Pavlik, S. Valenta, C. Domingo-Pardo, V. Bécares, E. González-Romero, Marco Calviani, Alfio Pappalardo, A. Mengoni, A. G. Smith, Philip Woods, B. Fernández-Domínguez, F. Käppeler, M. Ayranov, J. L. Tain, M. Brugger, I. F. Gonçalves, Niko Kivel, S. Heinitz, S. Altstadt, S. Warren, V. Variale, S. Barros, Tatsuya Katabuchi, A. Ventura, Rene Reifarth, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Sergio Cristallo, A. Musumarra, Tanja Heftrich, Annamaria Mazzone, Petar Žugec, A. Riego-Perez, Kathrin Göbel, Jan Heyse, R. Vlastou, E. Berthoumieux, L. Audouin, T. J. Wright, C. Wolf, E. Dupont, J. Lerendegui, A. J. M. Plompen, and D. M. Castelluccio

Subjects
Nuclear reaction, Physics, 010308 nuclear & particles physics, General Physics and Astronomy, chemistry.chemical_element, Alpha particle, Neutron radiation, 7. Clean energy, 01 natural sciences, Neutron temperature, Nuclear physics, Big Bang nucleosynthesis, chemistry, 13. Climate action, Nucleosynthesis, 0103 physical sciences, Neutron, Lithium, Nuclear Experiment, 010306 general physics
Abstract

The energy-dependent cross section of the (7)Bed(n,alpha)He-4 reaction, of interest for the so-called cosmological lithium problem in big bang nucleosynthesis, has been measured for the first time from 10 meV to 10 keV neutron energy. The challenges posed by the short half-life of Be-7 and by the low reaction cross section have been overcome at n_TOF thanks to an unprecedented combination of the extremely high luminosity and good resolution of the neutron beam in the new experimental area (EAR2) of the n_TOF facility at CERN, the availability of a sufficient amount of chemically pure Be-7, and a specifically designed experimental setup. Coincidences between the two alpha particles have been recorded in two Si-Be-7-Si arrays placed directly in the neutron beam. The present results are consistent, at thermal neutron energy, with the only previous measurement performed in the 1960s at a nuclear reactor. The energy dependence reported here clearly indicates the inadequacy of the cross section estimates currently used in BBN calculations. Although new measurements at higher neutron energy may still be needed, the n_TOF results hint at a minor role of this reaction in BBN, leaving the long-standing cosmological lithium problem unsolved.

Published
2016

50. Measurement of the 242Pu(n,f) cross section at the CERN n TOF facility

Author

F. Becvar, Srinivasan Ganesan, A. Tsinganis, Nicola Colonna, L.S. Leong, F. Mingrone, J. Andrzejewski, M. B. Gómez-Hornillos, S. Andriamonje, Jeri Kroll, E. Mendoza, C. Langer, Peter Schillebeeckx, N. Dzysiuk, Roberto Losito, A. Manousos, P. F. Mastinu, R. Sarmento, M. Mastromarco, A. Mallick, G. Vannini, A. Riego, A. Hernández-Prieto, Massimo Barbagallo, C. Carrapiço, Anton Wallner, F. Gunsing, J. Marganiec, P. Vaz, Cristian Massimi, W. Mondalaers, S. Altstadt, R. Versaci, A. Ventura, D. Bosnar, A. J. M. Plompen, G. Cortes, P. M. Milazzo, D. Tarrío, C. Lederer, F. Käppeler, M. Kokkoris, M. Mirea, C. Rubbia, M. S. Robles, K. Fraval, Variale, Vlachoudis, A. Pavlik, C. Domingo-Pardo, F. Calviño, N. Kivel, E. Jericha, H. Leeb, M. Sabaté-Gilarte, J. Perkowski, G. Giubrone, M Krtiˇcka, Dorothea Schumann, T. Martinez, Rene Reifarth, E. Berthoumieux, P. Gurusamy, J. L. Tain, D. Cano-Ott, M. Diakaki, Stefan Schmidt, A. K. Saxena, Arnaud Ferrari, G. Tagliente, D. G. Jenkins, J. M. Quesada, L. Tassan-Got, I. F. Gonçalves, C. Paradela, Alberto Mengoni, J. Billowes, L. Audouin, T. J. Wright, Mario Weigand, M. A. Cortés-Giraldo, Fabio Belloni, Bécares, C. Lampoudis, Boccone, S. Valenta, P. Zugec, Marco Calviani, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, E. González-Romero, M. P. W. Chin, Carlos Guerrero, F. Roman, M. Meaze, M. J. Vermeulen, A. R. García, M. Brugger, P. E. Koehler, Javier Praena, C. Weiss, R. Vlastou, T. Ware, E. Griesmayer, Y. Kadi, F. Cerutti, I. Duran, Rugard Dressler, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Ventura, A., Mengoni, A., A. Tsingani, E. Berthoumieux, C. Guerrero, N. Colonna, M. Calviani, R. Vlastou, S. Andriamonje, V. Vlachoudi, F. Gunsing, C. Massimi, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Becare, F. Becvar, F. Belloni, J. Billowe, V. Boccone, D. Bosnar, M. Brugger, F. Calvino, D. Cano-Ott, C. Carrapico, F. Cerutti, M. Chin, G. Corte, M. A. Cortes-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, N. Dzysiuk, C. Eleftheriadi, A. Ferrari, K. Fraval, S. Ganesan, A. R. Garcia, G. Giubrone, M. B. Gomez-Hornillo, I. F. Goncalve, E. Gonzalez-Romero, E. Griesmayer, P. Gurusamy, A. Hernandez-Prieto, D. G. Jenkin, E. Jericha, Y. Kadi, F. Kaeppeler, D. Karadimo, N. Kivel, P. Koehler, M. Kokkori, M. Krticka, J. Kroll, C. Lampoudi, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L. S. Leong, R. Losito, A. Mallick, A. Manouso, J. Marganiec, T. Martinez, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondalaer, C. Paradela, A. Pavlik, J. Perkowski, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego, M. S. Roble, F. Roman, C. Rubbia, M. Sabate-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J. L. Tain, D. Tarrio, L. Tassan-Got, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, A. Wallner, T. Ware, M. Weigand, C. Wei, T. Wright, and P. Zugec

Subjects
Physics, Nuclear reaction, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Nuclear and High Energy Physics, Fission, Large Hadron Collider, Cross section, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, CERN - n_TOF, Nuclear Theory, TOF, Nuclear data, Neutron, NEUTRON TIME OF FLIGHT, Neutons, NEUTRON INDUCED FISSION, 242Pu, neutron induced fission, n_TOF, Nuclear physics, Cross section (physics), Nuclear reactions, Nuclear Experiment
Abstract

The accurate knowledge of relevant nuclear data is crucial for the design of advanced nuclear systems. These data include neutron cross sections of various plutonium isotopes and other minor actinides. The 242Pu(n,f) cross section was measured at the CERN n_TOF facility, taking advantage of the wide energy range (from thermal to GeV) and the high instantaneous flux of the neutron beam. Preliminary results for the measurement are presented., JRC.D.4-Standards for Nuclear Safety, Security and Safeguards

Published
2014

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