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319 results on '"Bécares, V."'

301. Experimental neutron capture data of 58Ni from the CERN n-TOF facility

Author: M. B. Gómez-Hornillos, Christoph Langer, M. Mirea, Petar Žugec, A. K. Saxena, J. Billowes, F. Cerutti, Arnaud Ferrari, H. Leeb, A. J. M. Plompen, G. Vannini, P. Vaz, J. Perkowski, G. Tagliente, Alberto Ventura, Rene Reifarth, V. Bécares, M. Krtička, F. Calviño, Stefan Schmidt, D. Cano-Ott, Alberto Mengoni, S. Heinitz, Vittorio Boccone, M. Diakaki, C. Paradela, Mario Weigand, J. M. Quesada, L. Tassan-Got, E. Jericha, L. Audouin, G. Cortes, Javier Praena, S. Lo Meo, V. Variale, D. Tarrío, M. Kokkoris, J. L. Tain, Dorothea Schumann, C. Weiß, T. Martinez, Rugard Dressler, Jeri Kroll, Roberto Versaci, A. Tsinganis, G. Giubrone, Carlos Guerrero, Nicola Colonna, S. Altstadt, A. Pavlik, R. Sarmento, L.S. Leong, Vasilis Vlachoudis, C. Rubbia, F. Mingrone, J. Andrzejewski, C. Domingo-Pardo, A. Riegov, T. J. Wright, A. Manousos, J. Marganiec, I. F. Gonçalves, F. Bečvář, Roberto Losito, E. Mendoza, P. M. Milazzo, Peter Schillebeeckx, N. Dzysiuk, K. Fraval, F. Gunsing, C. Lederer, R. Vlastou, Fabio Belloni, E. Chiaveri, E. Berthoumieux, P. F. Mastinu, Cristian Massimi, Marco Pignatari, Damir Bosnar, Y. Kadi, S. Valenta, Marco Calviani, F. Käppeler, N. Kivel, P. Gurusamy, M. Meaze, M. J. Vermeulen, W. Mondalaers, M. Mastromarco, C. Carrapiço, Anton Wallner, I. Duran, D. G. Jenkins, M. A. Cortés-Giraldo, P. E. Koehler, T. Ware, E. Griesmayer, A. R. García, M. Brugger, Srinivasan Ganesan, Mario Barbagallo, M. P. W. Chin, F. Roman, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, E. González-Romero, Žugec, P., Barbagallo, M., Colonna, N., Bosnar, D., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heinitz, S., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riegov, A., Roman, F., Rubbia, C., 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., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
Subjects: Nuclear reaction, nTOF, Physics::Instrumentation and Detectors, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Neutron, Nuclear physics, Physics and Astronomy (all), CERN, Neutron cross section, Nuclear Experiment, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Physics, Large Hadron Collider, Física [Àrees temàtiques de la UPC], Cross section, Reaccions nuclears, Resonance, Neutron temperature, Time of flight, Neutron capture, Nuclear reactions
Abstract: The neutron capture cross section of 58 Ni was measured at the neutron time of flight facility n_TOF at CERN, from 27 meV to 400 keV neutron energy. Special care has been taken to identify all the possible sources of background, with the so-called neutron background obtained for the first time using high-precision GEANT4 simulations. The energy range up to 122 keV was treated as the resolved resonance region, where 51 resonances were identified and analyzed by a multilevel R -matrix code SAMMY. Above 122 keV the code SESH was used in analyzing the unresolved resonance region of the capture yield. Maxwellian averaged cross sections were calculated in the temperature range of kT = 5 – 100 keV, and their astrophysical implications were investigated.
Published: 2015

302. The measurement programme at the neutron time-of-flight facility n_TOF at CERN

Author: M. Krtička, T. Martinez, M. Mastromarco, M. Licata, Y. H. Chen, J. Marganiec, E. Chiaveri, P. F. Mastinu, I. Porras, F. Bečvář, E. Leal-Cidoncha, Anton Wallner, C. Wolf, P. Kavrigin, C. Rubbia, Rene Reifarth, Stefan Schmidt, E. Mendoza, G. Vannini, Ralf Nolte, A. Gawlik, N. Patronis, A. K. Saxena, Peter Schillebeeckx, A. S. Brown, P. C. Rout, F. Mingrone, C. Lederer, J. M. Quesada, Arnaud Ferrari, L. Tassan-Got, Thomas Rauscher, Javier Praena, S. Lo Meo, A. Goverdovski, G. Tagliente, F. R. Palomo-Pinto, D. M. Castelluccio, A. Kimura, Srinivasan Ganesan, J. Andrzejewski, E. Griesmayer, Alberto Mengoni, C. Paradela, D. Macina, Carlos Guerrero, M. Caamaño, S. Heinitz, J. Billowes, O. Aberle, V. Khryachkov, J. L. Tain, L. Audouin, P. M. Milazzo, M. S. Robles, Tatsuya Katabuchi, D. Cano-Ott, S. Montesano, A. R. García, V. Bécares, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Mario Barbagallo, Deniz Kurtulgil, P. V. Sedyshev, Emilio Andrea Maugeri, S. V. Suryanarayana, Niko Kivel, F. Cerutti, M. Kokkoris, L. Cosentino, S. Barros, I. Duran, M. Brugger, E. Jericha, G. Cortes, A. Musumarra, C. Beinrucker, Paolo Finocchiaro, D. Tarrío, K. Rajeev, Dorothea Schumann, J. A. Ryan, K. Deo, Simone Gilardoni, A. Hernández-Prieto, Francesca Matteucci, V. Ketlerov, E. González, R. J. W. Frost, A. Casanovas, M. Diakaki, R. Cardella, I. F. Gonçalves, Alexandru Negret, J. Balibrea-Correa, B. Fernández-Domínguez, F. Käppeler, C. Weiss, Tanja Heftrich, A. Oprea, P. Vaz, S. Warren, A. Riego-Perez, Kathrin Göbel, Damir Bosnar, Y. Kadi, L. A. Damone, Alberto Ventura, Jan Heyse, A. Stamatopoulos, S. Valenta, V. Variale, Marco Calviani, A. Pavlik, A. Kalamara, A. G. Smith, C. Domingo-Pardo, Philip Woods, Fabio Belloni, Hideo Harada, M. Sabaté-Gilarte, F. Gunsing, Cristian Massimi, A. Masi, D. G. Jenkins, M. Mirea, F. Calviño, H. Leeb, M. A. Cortés-Giraldo, J. Perkowski, Pedro G. Ferreira, Mario Weigand, R. Vlastou, D. Radeck, E. Berthoumieux, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, Rugard Dressler, V. Furman, T. J. Wright, A. Tsinganis, Nicola Colonna, Vasilis Vlachoudis, M. Bacak, T. Glodariu, Roberto Losito, E. Dupont, Ioana Gheorghe, J. Lerendegui, 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, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, 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., Brown, A., 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., Gilardoni, S., 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., Kalamara, A., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui, J., Licata, M., Meo, S. Lo, 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., Negret, A., Oprea, A., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rout, P., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Sosnin, N.V., 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., and Ž Ugec, P.
Subjects: Engineering, Nuclear transmutation, QC1-999, Nuclear engineering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), 0103 physical sciences, Física::Electromagnetisme [Àrees temàtiques de la UPC], ddc:530, Nuclear Physics - Experiment, Neutron, 010306 general physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Large Hadron Collider, 010308 nuclear & particles physics, business.industry, Physics, Nuclear data, Radioactive waste, Nuclear technology, Beamline, Criticality, business
Abstract: Neutron-induced reaction cross sections are important for a wide variety of research fields ranging from the study of nuclear level densities, nucleosynthesis to applications of nuclear technology like design, and criticality and safety assessment of existing and future nuclear reactors, radiation dosimetry, medical applications, nuclear waste transmutation, accelerator-driven systems and fuel cycle investigations. 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. 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 its 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 n TOF will be presented.
Published: 2017

303. The nucleosynthesis of heavy elements in Stars: the key isotope 25Mg

Author: P. F. Mastinu, K. Fraval, M. Krtička, F. Calviño, T. Martinez, A. J. M. Plompen, J. L. Tain, Rene Reifarth, E. Chiaveri, Javier Praena, J. M. Quesada, L. Tassan-Got, F. Mingrone, J. Andrzejewski, F. Gunsing, C. Lampoudis, A. Riego, Srinivasan Ganesan, A. K. Saxena, G. Tagliente, Arnaud Ferrari, A. Pavlik, A. Hernández-Prieto, Cristian Massimi, Mario Barbagallo, A. Mallick, G. Vannini, C. Domingo-Pardo, M. Sabaté-Gilarte, F. Cerutti, Carlos Guerrero, Alberto Mengoni, T. Ware, Jeri Kroll, E. Griesmayer, A. Ventura, C. Rubbia, Roberto Losito, R. Sarmento, A. Tsinganis, G. Cortes, D. Tarrío, P. E. Koehler, P. Vaz, G. Giubrone, Rugard Dressler, E. Jericha, C. Paradela, I. Duran, L. Audouin, N. Kivel, Dorothea Schumann, Nicola Colonna, L.S. Leong, Vasilis Vlachoudis, C. Weiß, P. M. Milazzo, M. Mastromarco, C. Carrapiço, Anton Wallner, F. Bečvář, W. Mondalaers, E. Mendoza, Stefan Kopecky, D. G. Jenkins, Peter Schillebeeckx, F. Käppeler, S. Altstadt, V. Bécares, M. A. Cortés-Giraldo, R. Vlastou, E. Berthoumieux, Petar Žugec, A. Manousos, J. Marganiec, J. Billowes, M. S. Robles, D. Cano-Ott, M. Diakaki, T. J. Wright, I. F. Gonçalves, Fabio Belloni, Sebastian Schmidt, M. Mirea, H. Leeb, J. Perkowski, Mario Weigand, Damir Bosnar, Y. Kadi, S. Valenta, Marco Calviani, M. J. Vermeulen, V. Variale, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, E. González-Romero, M. P. W. Chin, A. R. García, M. Brugger, Christoph Langer, C. Lederer, Mengoni, A., 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, Lunardi, S., Massimi, C., Koehler, P., Kopecky, S., Mingrone, F., Schillebeeckx, P., Vannini, G., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., 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., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., 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., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.
Subjects: Physics, Nuclear reaction, Energies::Energia nuclear [Àrees temàtiques de la UPC], Isotope, Stable isotope ratio, Physics::Instrumentation and Detectors, 25Mg, stellar nucleosynthesis, neutron capture, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Nuclear energy, Neutron temperature, Nuclear physics, Physics and Astronomy (all), Nucleosynthesis, Energia nuclear, Neutron, s-process, Nuclear Experiment, Isotopes of magnesium
Abstract: We have measured the radiative neutron-capture cross section and the total neutron-induced cross section of one of the most important isotopes for the s process, the 25Mg. The measurements have been carried out at the neutron time-of-flight facilities n-TOF at CERN (Switzerland) and GELINA installed at the EC-JRC-IRMM (Belgium). The cross sections as a function of neutron energy have been measured up to approximately 300 keV, covering the energy region of interest to the s process. The data analysis is ongoing and preliminary results show the potential relevance for the s process. © Owned by the authors, published by EDP Sciences, 2014.
Published: 2014

304. Measurements of neutron cross sections for advanced nuclear energy systems at n-TOF (CERN)

Author: Srinivasan Ganesan, M. Mirea, A. Hernández-Prieto, G. Vannini, H. Leeb, J. L. Tain, J. Perkowski, W. Mondalaers, V. Variale, Christoph Langer, F. Gunsing, G. Tagliente, N. Kivel, Rene Reifarth, A. Manousos, Cristian Massimi, Stefan Schmidt, A. Riego, T. J. Wright, J. M. Quesada, G. Cortes, J. Marganiec, M. Krtička, D. Tarrío, L. Tassan-Got, G. Giubrone, F. Calviño, C. Rubbia, Petar Žugec, A. K. Saxena, Arnaud Ferrari, T. Martinez, Roberto Losito, J. Billowes, F. Mingrone, J. Andrzejewski, F. Bečvář, Mario Weigand, M. Mastromarco, E. Chiaveri, P. F. Mastinu, E. Mendoza, F. Käppeler, Massimo Barbagallo, C. Carrapiço, Anton Wallner, Rugard Dressler, A. Pavlik, C. Lampoudis, D. Cano-Ott, A. Ventura, Peter Schillebeeckx, C. Lederer, N. Colonna, C. Domingo-Pardo, M. Diakaki, P. M. Milazzo, A. Tsinganis, R. Vlastou, E. Berthoumieux, Alberto Mengoni, M. Sabaté-Gilarte, L.S. Leong, I. F. Gonçalves, Vasilis Vlachoudis, E. Leal-Cidoncha, K. Fraval, S. Altstadt, C. Paradela, Fabio Belloni, C. Eleftheriadis, L. Audouin, V. Bécares, Thomas Rauscher, Damir Bosnar, D. Karadimos, P. Vaz, E. González-Romero, Y. Kadi, E. Jericha, Dorothea Schumann, M. P. W. Chin, C. Weiß, Carlos Guerrero, A. R. García, M. Brugger, M. J. Vermeulen, P. E. Koehler, S. Valenta, F. Cerutti, Marco Calviani, I. Duran, T. Ware, E. Griesmayer, Javier Praena, D. G. Jenkins, M. A. Cortés-Giraldo, Jeri Kroll, R. Sarmento, A. J. M. Plompen, Ventura, A., Mengoni, A., 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, Lunardi, S., Barbagallo, M., Colonna, N., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., 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., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., 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., Variale, V., Vaz, P., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.
Subjects: Nuclear reaction, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], QC1-999, Nuclear Theory, Nuclear data, Nuclear energy, Neutron radiation, Nuclear physics, Uranium-236, Physics and Astronomy (all), Plutonium-242, Nuclear astrophysics, Neutron source, Energia nuclear, Physics::Accelerator Physics, Neutron, neutron cross sections, n_TOF, advanced nuclear energy systems, Nuclear Experiment
Abstract: The n-TOF facility operates at CERN with the aim of addressing the request of high accuracy nuclear data for advanced nuclear energy systems as well as for nuclear astrophysics. Thanks to the features of the neutron beam, important results have been obtained on neutron induced fission and capture cross sections of U, Pu and minor actinides. Recently the construction of another beam line has started; the new line will be complementary to the first one, allowing to further extend the experimental program foreseen for next measurement campaigns. © Owned by the authors, published by EDP Sciences, 2014.
Published: 2014

305. Neutron cross-sections for advanced nuclear systems: The n-TOF project at CERN

Author: G. Tagliente, V. Variale, F. Cerutti, Mario Weigand, M. P. W. Chin, Y. Kadi, C. Lederer, R. Vlastou, E. Chiaveri, C. Paradela, G. Giubrone, P. F. Mastinu, E. Berthoumieux, A. Manousos, S. Valenta, P. Vaz, L. Audouin, Rugard Dressler, Marco Calviani, M. Mirea, Christoph Langer, J. Marganiec, A. Tsinganis, T. Ware, F. Mingrone, J. Andrzejewski, Javier Praena, Petar Žugec, S. Altstadt, A. Ventura, E. Leal-Cidoncha, A. K. Saxena, Arnaud Ferrari, Srinivasan Ganesan, M. Krtička, E. Jericha, C. Eleftheriadis, F. Calviño, E. Griesmayer, L.S. Leong, H. Leeb, Vasilis Vlachoudis, F. Käppeler, Dorothea Schumann, C. Weiß, F. Bečvář, T. Martinez, J. Perkowski, J. Billowes, E. Mendoza, I. F. Gonçalves, M. A. Cortés-Giraldo, M. J. Vermeulen, M. Mastromarco, F. Gunsing, Peter Schillebeeckx, C. Lampoudis, A. Hernández-Prieto, Massimo Barbagallo, Thomas Rauscher, N. Colonna, D. Bosnar, C. Carrapiço, Cristian Massimi, Anton Wallner, Fabio Belloni, D. Karadimos, A. Riego, Jeri Kroll, Roberto Losito, V. Bécares, I. Duran, E. González-Romero, T. J. Wright, D. Cano-Ott, Rene Reifarth, R. Sarmento, K. Fraval, A. J. M. Plompen, M. Diakaki, A. R. García, W. Mondalaers, Carlos Guerrero, M. Brugger, A. Pavlik, C. Domingo-Pardo, D. G. Jenkins, M. Sabaté-Gilarte, P. E. Koehler, P. M. Milazzo, G. Cortes, D. Tarrío, G. Vannini, C. Rubbia, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Alberto Mengoni, J. L. Tain, Niko Kivel, Sarkadi, L., Barbagallo, M, Mastromarco, M., Colonna, N., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., 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., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., 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., 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, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
Subjects: Nuclear reaction, Computer science, Nuclear engineering, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear physics, Context (language use), Neutron, 7. Clean energy, 01 natural sciences, Physics and Astronomy (all), Stellar nucleosynthesis, CERN, 0103 physical sciences, n_TOF, 010306 general physics, Nuclear Experiment, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Physics, Radioactive waste, Neutron radiation, Engineering physics, Nuclear technology, Time of flight facility, Física nuclear, Nuclear reactions
Abstract: The study of neutron-induced reactions is of high relevance in a wide variety of fields, ranging from stellar nucleosynthesis and fundamental nuclear physics to applications of nuclear technology. In nuclear energy, high accuracy neutron data are needed for the development of Generation IV fast reactors and accelerator driven systems, these last aimed specifically at nuclear waste incineration, as well as for research on innovative fuel cycles. In this context, a high luminosity Neutron Time Of Flight facility, n-TOF, is operating at CERN since more than a decade, with the aim of providing new, high accuracy and high resolution neutron cross-sections. Thanks to the features of the neutron beam, a rich experimental program relevant to nuclear technology has been carried out so far. The program will be further expanded in the near future, thanks in particular to a new high-flux experimental area, now under construction.
Published: 2014

306. 238U(n, gamma) reaction cross section measurement with C6D6 detectors at the n_TOF CERN facility

Author: G. Cortes, D. Tarrío, C. Lederer, F. Bečvář, F. Käppeler, E. Mendoza, I. Duran, F. Cerutti, Peter Schillebeeckx, F. Mingrone, C. Lampoudis, Y. Kadi, J. Andrzejewski, T. Ware, V. Bécares, E. Griesmayer, A. Riego, A. Mallick, G. Vannini, A. K. Saxena, G. Tagliente, Javier Praena, P. M. Milazzo, Arnaud Ferrari, V. Variale, Jeri Kroll, M. P. W. Chin, M. S. Robles, M. J. Vermeulen, J. Billowes, P. E. Koehler, E. Jericha, I. F. Gonçalves, P. Vaz, Sebastian Schmidt, S. Altstadt, D. Cano-Ott, Dorothea Schumann, C. Weiß, S. Valenta, M. Diakaki, R. Sarmento, Marco Calviani, Fabio Belloni, R. Vlastou, A. Manousos, E. Berthoumieux, J. Marganiec, A. R. García, D. Bosnar, M. Brugger, G. Giubrone, A. J. M. Plompen, Carlos Guerrero, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, T. J. Wright, E. González-Romero, Christoph Langer, Petar Žugec, A. Pavlik, C. Domingo-Pardo, M. Sabaté-Gilarte, C. Paradela, L. Audouin, W. Mondalaers, Pierfrancesco Mastinu, D. G. Jenkins, Roberto Losito, M. A. Cortés-Giraldo, Srinivasan Ganesan, Rugard Dressler, A. Tsinganis, Nicola Colonna, L.S. Leong, Vasilis Vlachoudis, Mario Barbagallo, C. Rubbia, J. L. Tain, Niko Kivel, K. Fraval, Alberto Mengoni, E. Chiaveri, M. Mirea, H. Leeb, J. Perkowski, F. Gunsing, Cristian Massimi, M. Krtička, F. Calviño, Mario Weigand, A. Ventura, T. Martinez, Rene Reifarth, J. M. Quesada, L. Tassan-Got, A. Hernández-Prieto, M. Mastromarco, C. Carrapiço, Anton Wallner, Ventura, A., Mengoni, A., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, INPC 2013 – International Nuclear Physics Conference, Lunardi, S., Mingrone, F., Massimi, C., Vannini, G., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., 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., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., 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., Variale, V., Vaz, P., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.
Subjects: Physics, Nuclear reaction, Energies::Energia nuclear [Àrees temàtiques de la UPC], Scintillation, Background subtraction, 010308 nuclear & particles physics, QC1-999, 238U, neutron capture, n_TOF, Nuclear energy, 01 natural sciences, Engineering physics, Particle detector, Nuclear physics, Physics and Astronomy (all), Cross section (physics), 0103 physical sciences, Scintillation counter, Measuring instrument, Energia nuclear, ddc:530, 010306 general physics, Data reduction
Abstract: The radiative capture cross section of 238U is very important for the developing of new reactor technologies and the safety of existing ones. Here the preliminary results of the 238U(n,γ) cross section measurement performed at n-TOF with C6D6 scintillation detectors are presented, paying particular attention to data reduction and background subtraction. © Owned by the authors, published by EDP Sciences, 2014.
Published: 2013

307. Performance of the neutron time-of-flight facility n_TOF at CERN

Author: F. Bečvář, M. Mirea, Yacine Kadi, P. Vaz, L. Audouin, M. B. Gómez-Hornillos, Carlos Guerrero, M. P. W. Chin, Alberto Ventura, Peter Schillebeeckx, N. Dzysiuk, Kathrin Göbel, Petar Žugec, H. Leeb, A. Manousos, F. Roman, Alfredo Ferrari, P. M. Milazzo, J. Perkowski, E. Chiaveri, C. Lampoudis, Srinivasan Ganesan, M. A. Cortés-Giraldo, D. Cano-Ott, A. J. M. Plompen, S. Altstadt, G. Giubrone, R. Versaci, J. Billowes, Mario Weigand, G. Tagliente, A. Pavlik, C. Domingo-Pardo, Fabio Belloni, A. Hernández-Prieto, A. R. García, M. Sabaté-Gilarte, F. Mingrone, J. Andrzejewski, V. Bécares, Mario Barbagallo, E. Jericha, M. Kokkoris, F. Gunsing, T. J. Wright, Rugard Dressler, M. Brugger, Dorothea Schumann, Carlo Rubbia, J. L. Tain, C. Langer, V. Vlachoudis, M. Meaze, Rene Reifarth, Jeri Kroll, M. Diakaki, Cristian Massimi, V. Boccone, Patrick Steinegger, W. Mondalaers, Stefan Schmidt, E. Mendoza, R. Sarmento, J. M. Quesada, E. Berthoumieux, Javier Praena, E. Leal-Cidoncha, A. Tsinganis, D. G. Jenkins, Laurent Tassan-Got, C. Eleftheriadis, I. Goncalves, T. Papaevangelou, Thomas Rauscher, M. Mastromarco, Nicola Colonna, L.S. Leong, C. Carrapiço, Anton Wallner, P. E. Koehler, D. Karadimos, C. Paradela, A. K. Saxena, M. J. Vermeulen, Roberto Losito, F. Cerutti, S. Valenta, I. Duran, Alberto Mengoni, Marco Calviani, C. Weiß, R. Vlastou, T. Ware, Damir Bosnar, E. Griesmayer, V. Variale, A. Riego, C. Lederer, F. Käppeler, N. Kivel, P. Gurusamy, G. Vannini, G. Cortes, D. Tarrío, T. Martinez, E. Gonzalez-Romero, K. Fraval, J. Marganiec, S. Andriamonje, P. F. Mastinu, M. Krtička, F. Calviño, Ventura, A., Mengoni, A., 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, nTOF, 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, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Guerrero C., Tsinganis A., Berthoumieux E., Barbagallo M., Belloni F., Gunsing F., Weiss C., Chiaveri E., Calviani M., Vlachoudis V., Altstadt S., Andriamonje S., Andrzejewski J., Audouin L., Bécares V., Becvar F., Billowes J., Boccone V., Bosnar D., Brugger M., Calvino F., Cano-Ott D., Carrapico C., Cerutti F., Chin M., Colonna N., Cortès G., Cortes-Giraldo M.A., Diakaki M., Domingo-Pardo C., Duran I., Dressler R., Dzysiuk N., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., Garcia A.R., Giubrone G., Gobel K., Gomez-Hornillos M.B., Gonzalves I.F., Gonzalez-Romero E., Griesmayer E., Gurusamy P., Hernandez-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Kappeler F., Karadimos D., Kivel N., Koehler P., Kokkoris M., Krtika M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Manousos A., Marganiec J., Martinez T., Massimi C., Mastinu P.F., Mastromarco M., Meaze M., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondalaers W., Papaevangelou T., Paradela C., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Roman F., Rubbia C., Sabate-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Steinegger P., Tagliente G., Tain J.L., Tarrio D., Tassan-Got L., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Versaci R., Vermeulen M.J., Vlastou R., Wallner A., Ware T., Weigand M., Wright T., and Zugec P.
Subjects: Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Física::Física de partícules [Àrees temàtiques de la UPC], Neutron scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Neutron time-of-flight scattering, MEASUREMENT, PERFORMANCE REPORT, Nuclear physics, Neutron flux, 0103 physical sciences, Neutron cross section, Neutron detection, Neutron, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, NEUTRON CROSS SECTION, 010308 nuclear & particles physics, Neutron temperature, n_TOF facility, Neutron source, Physics::Accelerator Physics, TIME OF FLIGHT
Abstract: The neutron time-of-flight facility n TOF features a white neutron source produced by spallation through 20 GeV/c protons impinging on a lead target. The facility, aiming primarily at the measurement of neutron-induced reaction cross sections, was operating at CERN between 2001 and 2004, and then underwent a major upgrade in 2008. This paper presents in detail all the characteristics of the new neutron beam in the currently available configurations, which correspond to two different collimation systems and two choices of neutron moderator. The characteristics discussed include the intensity and energy dependence of the neutron flux, the spatial profile of the beam, the in-beam background components and the energy resolution/broadening. The discussion of these features is based on dedicated measurements and Monte Carlo simulations, and includes estimations of the systematic uncertainties of the mentioned quantities.
Published: 2013

308. Angular distribution in the neutron-induced fission of actinides

Author: A. Manousos, Willy Mondelaers, A. Mengon, R. Sarmento, C. Eleftheriadis, M. B. Gómez-Hornillos, D. Schumann, G. Cortes, Thomas Rauscher, D. Tarrío, M. Mirea, Carlos Guerrero, R. Dressler, M. Mastromarco, F. Roman, S. Valenta, González-Romero, P. E. Koehler, R. Reifhart, G. Korschinek, C. Carrapiço, J. Billowes, J. Marganiec, V. Vlastou, T. Ware, A. R. García, Anton Wallner, C. Paradela, M. Brugger, V. Variale, G. Giubrone, L. Audouin, G. Tagliente, F. Calviño, P. Gurusamy, G. Vannini, E. Jericha, E. Griesmayer, C. Rubbia, E. Mendoza, Jan Perkowski, M. Weigand, M. P. W. Chin, Nicola Colonna, F. Bečvář, L.S. Leong, V. Vlachoudis, K. Fraval, M. Diakaki, R. Versaci, C. Weiß, I. Duran, N. Dzysiuk, P. F. Mastinu, E. Berthoumieux, E. Kadi, Marco Pignatari, C. Le Naour, A. Riego, P. Schillebeeckx, V. Bécares, Arnaud Ferrari, F. Gunsing, M. Meaze, T. Wright, I. F. Gonçalves, Cristian Massimi, J. L. Tain, M. Krtička, Marco Calviani, C. Lederer, T. Martinez, Fabio Belloni, S. Altstadt, A. Plompen, P. M. Milazzo, N. Kivel, A. Pavlik, C. Langer, C. Domingo-Pardo, A. Tsinganis, F. Käppeler, D. Karadimos, D. Bosnar, M. Kokkoris, T. Mingrone, E. Chiaveri, M. J. Vermeulen, Srinivasan Ganesan, D. G. Jenkins, D. Cano-Ott, Hannes Leeb, Mario Barbagallo, M. A. Cortés-Giraldo, J. Andrzejewsky, R. Losito, J. Kroll, P. Vaz, Javier Praena, Alberto Ventura, Zǔgec, Stefan Schmidt, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, F. Cerutti, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mengoni, A., Chatillon, A., Leong, L.S., Tassan-Got, L., Tarrio, D., Audouin, L., Paradela, C., Duran, I., Le Naour, C., Altstadt, S., Andrzejewsky, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calvino, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González, Romero, Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Jenkins, D.G., Jericha, E., Kadi, E., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Korschinek, G., Kroll, J., Krtička, M., Langer, C., Lederer, C., Leeb, H., Losito, R., Manousos, A., Marganiec, J., Massimi, C., Martínez, T., Mastinu, P.F., Mastromarco, M., Meaze, M., Mengon, A., Mendoza, E., Milazzo, P.M., Mingrone, T., Mirea, M., Mondelaers, W., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifhart, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Schumann, D., Taín, J.L., Tagliente, G., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, V., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Zç, Gec
Subjects: Nuclear reaction, Nuclear fission product, Fission, QC1-999, health care facilities, manpower, and services, education, Nuclear Theory, Nuclear physics, Neutron induced fission, Neutron, 7. Clean energy, 01 natural sciences, Physics and Astronomy (all), Angular distribution, 0103 physical sciences, CERN, Physics::Atomic and Molecular Clusters, n_TOF, 010306 general physics, Spectroscopy, Nuclear Experiment, health care economics and organizations, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, neutron induced fission, angular distribution, actinides, Actinide, Nuclear fission, Física nuclear
Abstract: Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular 232Th. The measurement has been performed at n-TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of 235U below 3 keV where the emission is isotropic. In the case of 232Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered. © Owned by the authors, published by EDP Sciences, 2013.
Published: 2013
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309. Simultaneous measurement of neutron-induced capture and fission reactions at CERN

Author: J. Marganiec, S. Andriamonje, J. L. Tain, E. Chiaveri, P. F. Mastinu, M. Meaze, V. Bécares, H. Leeb, E. Berthoumieux, A. Manousos, J. Perkowski, Roberto Losito, M. Fernandez-Ordonez, Iris Dillmann, F. Gramegna, T. Ware, F. Käppeler, Srinivasan Ganesan, G. Cortes, G. Tagliente, T. J. Wright, M. Krtička, Alberto Mengoni, P. Vaz, J. Billowes, D. Tarrío, E. Lebbos, F. Calviño, M. Vermeullen, F. Gunsing, E. Griesmayer, Rene Reifarth, Mario Barbagallo, Ralf Plag, Alberto Ventura, T. Martinez, Cristian Massimi, F. Bečvář, J. M. Quesada, Anton Wallner, J. Andrzejewski, D. Cano-Ott, A. Tsinganis, M. Diakaki, C. Rubbia, P. M. Milazzo, C. Eleftheriadis, E. Mendoza, Nicola Colonna, D. G. Jenkins, Laurent Tassan-Got, C. Carrapiço, Vasilis Vlachoudis, S. Marrone, C. Lederer, Carlos Guerrero, G. Vannini, E. Jericha, M. A. Cortés-Giraldo, A. Pavlik, C. Weiß, Javier Praena, C. Domingo-Pardo, Arnaud Ferrari, I. Duran, F. Belloni, F. Cerutti, G. Giubrone, M. B. Gómez-Hornillos, Manuel Lozano, C. Paradela, L. Audouin, Jeri Kroll, R. Sarmento, I. F. Gonçalves, R. Vlastou, Y. Kadi, Marco Calviani, V. Variale, M. P. W. Chin, F. Roman, M. Brugger, Thomas Rauscher, D. Karadimos, E. González-Romero, 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), TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Guerrero C., Berthoumieux E., Cano-Ott D., Mendoza E., Andriamonje S., Andrzejewski J., Audouin L., Barbagallo M., Bécares V., Bečvář F., Belloni F., Billowes J., Brugger M., Calviani M., Calviño F., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M., Diakaki M., Dillmann I., Domingo-Pardo C., Duran I., Eleftheriadis C., Fernández-Ordóñez M., Ferrari A., Ganesan S., Giubrone G., Gómez-Hornillos M., Gonçalves I., González-Romero E., Gramegna F., Griesmayer E., Gunsing F., Jenkins D., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kroll J., Krtička M., Lebbos E., Lederer C., Leeb H., Losito R., Lozano M., Manousos A., Marganiec J., Marrone S., Martinez T., Massimi C., Mastinu P., Meaze M., Mengoni A., Milazzo P., Paradela C., Pavlik A., Perkowski J., Plag R., Praena J., Quesada J., Rauscher T., Reifarth R., Roman F., Rubbia C., Sarmento R., Tagliente G., Tain J., Tarrío D., Tassan-Got L., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vermeullen M., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weiß C., Wright T., 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, Nuclear and High Energy Physics, Fission, TOTAL ABSORPTION CALORIMETER, Nuclear physics, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Neutrons--Capture, 0103 physical sciences, Nuclear fusion, Neutron, 010306 general physics, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Isotopes of uranium, Fissile material, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, MicroMegas detector, Uranium-236, TIME-OF-FLIGHT, NEUTRON-INDUCED REACTIONS, MICROMEGAS, Física nuclear
Abstract: The measurement of the capture cross-section of fissile elements, of utmost importance for the design of innovative nuclear reactors and the management of nuclear waste, faces particular difficulties related to the $ \gamma$ -ray background generated in the competing fission reactions. At the CERN neutron time-of-flight facility n_TOF we have combined the Total Absorption Calorimeter (TAC) capture detector with a set of three 235U loaded MicroMegas (MGAS) fission detectors for measuring simultaneously two reactions: capture and fission. The results presented here include the determination of the three detection efficiencies involved in the process: $\ensuremath \varepsilon_{TAC}(n,f)$ , $\ensuremath \varepsilon_{TAC}(n,\gamma)$ and $\ensuremath \varepsilon_{MGAS}(n,f)$ . In the test measurement we have succeeded in measuring simultaneously with a high total efficiency the 235U capture and fission cross-sections, disentangling accurately the two types of reactions. The work presented here proves that accurate capture cross-section measurements of fissile isotopes are feasible at n_TOF.
Published: 2012

310. Measurement of the radiative capture cross section of the s-process branching points 204Tl and 171Tm at the n_TOF facility (CERN)

Author: M. Caamaño, A. Musumarra, Y. H. Chen, J. Andrzejewski, J. Ulrich, A. Kimura, R. Vlastou, D. Radeck, E. Berthoumieux, A. Oprea, G. Cortes, M. Sabaté-Gilarte, V. Furman, T. J. Wright, D. Ramos, S. Valenta, Marco Calviani, A. G. Smith, V. Alcayne, A. Casanovas, P. Vaz, Alberto Ventura, Rene Reifarth, M. Dietz, E. Chiaveri, F. Ogállar, G. Tagliente, F. Mingrone, P. F. Mastinu, F. Gunsing, I. Duran, Francesca Matteucci, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, M. Mastromarco, Philip Woods, A. Pavlik, F. Bečvář, Ralf Nolte, C. Domingo-Pardo, L. A. Damone, Massimo Barbagallo, D. Cano-Ott, M. Diakaki, A. Masi, Anton Wallner, D. G. Jenkins, L. Caballero-Ontanaya, Cristian Massimi, M. A. Cortés-Giraldo, L. Persanti, L. Audouin, V. Michalopoulou, L. Cosentino, E. Mendoza, V. Variale, Dimitri Rochman, M. Krtička, N. Patronis, O. Aberle, Paolo Finocchiaro, A. K. Saxena, Dorothea Schumann, Arnaud Ferrari, T. Martinez, S. Heinitz, Peter Schillebeeckx, J. M. Quesada, Rugard Dressler, G. Bellia, Simone Gilardoni, A. S. Brown, D. Bosnar, F. Calviño, D. Macina, L. Tassan-Got, Ulli Köster, I. Ladarescu, Maurizio Busso, Carlos Guerrero, A. Tsinganis, J. Perkowski, J. Billowes, Kathrin Göbel, P. M. Milazzo, Sergio Cristallo, Nicola Colonna, Javier Praena, S. Lo Meo, Y. Kopatch, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Claudia Lederer-Woods, Jan Heyse, E. Dupont, Vasilis Vlachoudis, Pedro G. Ferreira, J. Lerendegui-Marco, Emilio Andrea Maugeri, Deniz Kurtulgil, M. Kokkoris, I. F. Gonçalves, M. Bacak, V. Bécares, F. Cerutti, Tatsuya Katabuchi, Z. Eleme, Ignacio Porras, T. Glodariu, Alexandru Negret, B. Fernández-Domínguez, F. Käppeler, A. Gawlik, Thomas Rauscher, A. Stamatopoulos, E. González-Romero, A. Mengoni, Y. Kadi, S. Simone, J. L. Tain, T. Talip, Niko Kivel, G. Vannini, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. Departament de Física, 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, Institut Laue-Langevin (ILL), 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), Casanovas, A., Domingo-Pardo, C., Guerrero, C., Lerendegui-Marco, J., Calviño, F., Tarifeño-Saldivia, A., Dressler, R., Heinitz, S., Kivel, N., Quesada, J.M., Schumann, D., Aberle, O., Alcayne, V., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Barbagallo, M., Bečvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Busso, M., Caamaño, M., Caballero-Ontanaya, L., Calviani, M., Cano-Ott, D., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Cristallo, S., Damone, L.A., Diakaki, M., Dietz, M., Dupont, E., Durán, I., Eleme, Z., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González-Romero, E., Gunsing, F., Heyse, J., Jenkins, D.G., Käppeler, F., Kadi, Y., Katabuchi, T., Kimura, A., Kokkoris, M., Kopatch, Y., Krtička, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Meo, S. Lo, Lonsdale, S.J., Macina, D., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P.M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Persanti, L., Porras, I., Praena, J., Radeck, D., Ramos, D., Rauscher, T., Reifarth, R., Rochman, D., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Simone, S., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Talip, T., Tassan-Got, L., Tsinganis, A., Ulrich, J., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P.J., Wright, T., Zugec, P., Köster, U., Yang Sun, and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Subjects: Nuclear reaction, nTOF, QC1-999, Nuclear Theory, Nuclear physics, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics and Astronomy (all), Cross section (physics), Nucleosynthesis, Nuclear Astrophysics, 0103 physical sciences, CERN, Neutron cross section, Nuclear Physics - Experiment, ddc:530, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Cross section, 010308 nuclear & particles physics, Neutron capture, Physics , Nuclear Astrophysics, neutron capture, 204Tl, 171Tm, n_TOF, Física nuclear, s-process, Nucleosíntesi
Abstract: The neutron capture cross section of some unstable nuclei is especially relevant for s-process nucleosynthesis studies. This magnitude is crucial to determine the local abundance pattern, which can yield valuable information of the s-process stellar environment. In this work we describe the neutron capture (n,γ) measurement on two of these nuclei of interest, 204Tl and 171Tm, from target production to the final measurement, performed successfully at the n_TOF facility at CERN in 2014 and 2015. Preliminary results on the ongoing experimental data analysis will also be shown. These results include the first ever experimental observation of capture resonances for these two nuclei.

311. The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance

Author: M. Kokkoris, A. K. Saxena, Arnaud Ferrari, J. Billowes, I. Duran, S. Girod, P. Vaz, Rugard Dressler, N. Kivel, G. Cortes, A. Tsinganis, M. A. Cortés-Giraldo, C. Weiß, Nicola Colonna, Alberto Ventura, M. Krtička, F. Calviño, M. Mastromarco, A. Kimura, J. Marganiec, R. Palomo Pinto, F. Gunsing, I. F. Gonçalves, F. Bečvář, R. J. W. Frost, T. Martinez, P. Kavrigin, E. Mendoza, Srinivasan Ganesan, R. Vlastou, E. Berthoumieux, M. Brugger, A. Stamatopoulos, Ralf Nolte, Cristian Massimi, Anton Wallner, A. Pavlik, C. Paradela, M. Bacak, V. Khryachkov, C. Domingo-Pardo, L. A. Damone, G. Vannini, Peter Schillebeeckx, E. Griesmayer, M. Sabaté-Gilarte, Fabio Belloni, Petar Žugec, Luigi Cosentino, D. Macina, Carlos Guerrero, M. Caamaño, G. Smith, V. Bécares, Mario Barbagallo, Roberto Losito, E. Leal-Cidoncha, F. Käppeler, M. Mirea, M. Licata, N. Patronis, Patrick Steinegger, J. L. Tain, E. Chiaveri, J. Balibrea-Correa, S. Warren, M. S. Robles, P. F. Mastinu, Thomas Rauscher, Damir Bosnar, S. Heinitz, Y. Kadi, D. López, E. Dupont, H. Leeb, D. Cano-Ott, V. Variale, I. Bergström, S. Valenta, A. Musumarra, M. Diakaki, J. Perkowski, P. V. Sedyshev, P. Ferreira, Marco Calviani, Hideo Harada, P. M. Milazzo, I. Porras, E. González-Romero, J. Lerendegui, V. Furman, T. J. Wright, K. Deo, Mario Weigand, C. Rubbia, V. Ketlerov, Tanja Heftrich, F. Mingrone, J. Andrzejewski, A. Riego-Perez, Saraswatula Venkata Suryanarayana, B. Fernández-Domínguez, E. Jericha, A. Gheorghe, V. Vlachoudis, Ariel Tarifeño-Saldivia, T. Glodariu, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, Alberto Mengoni, G. Tagliente, A. Hernández-Prieto, Rene Reifarth, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Tatsuya Katabuchi, S. Barros, Francesca Matteucci, C. Beinrucker, O. Aberle, A. Goverdovski, S. Montesano, C. Lederer, Kathrin Göbel, Jan Heyse, L. Audouin, D. G. Jenkins, Javier Praena, S. Lo Meo, F. Cerutti, 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. NERG - Grup de Recerca d'Enginyeria Nuclear, Mengoni, A., Lo Meo, S., 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, Weiß, C, Chiaveri, E., Girod, S., Vlachoudis, V., Aberle, O., Barros, S., Bergström, I., Berthoumieux, E., Calviani, M., Guerrero, C., Sabaté-Gilarte, M., Tsinganis, A., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Bécares, V., Beinrucker, C., Belloni, F., Bečvář, F., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Cano-Ott, D., Cerutti, F., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L., Deo, K., Diakaki, M., Domingo-Pardo, C., Dupont, E., Durán, I., Dressler, R., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R., Furman, V., Ganesan, S., Gheorghe, A., Glodariu, T., Göbel, K., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., 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., López, D., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo Pinto, R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M.S., Rubbia, C., Ryan, J., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, G., Stamatopoulos, A., Steinegger, P., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlastou, R., Wallner, A., Warren, S., Weigand, M., 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: Astrofísica, Nuclear and High Energy Physics, n-TOF facility, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Montecarlo, Mètode de, Física::Física de partícules [Àrees temàtiques de la UPC], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 01 natural sciences, law.invention, Nuclear physics, FLUKA, law, Neutron flux, 0103 physical sciences, Neutron, Beam dump, 010306 general physics, Nuclear Experiment, Instrumentation, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Neutron cross-section measurement, Neutron time-of-flight, 010308 nuclear & particles physics, Collimator, Neutron radiation, Accelerators and Storage Rings, NATURAL SCIENCES. Physics, n_TOF facility, PRIRODNE ZNANOSTI. Fizika, Beamline, Physics::Accelerator Physics, neutron time-of-flight, neutron cross-section measurement
Abstract: At the neutron time-of-flight facility n_TOF at CERN a new vertical beam line was constructed in 2014, in order to extend the experimental possibilities at this facility to an even wider range of challenging cross-section measurements of interest in astrophysics, nuclear technology and medical physics. The design of the beam line and the experimental hall was based on FLUKA Monte Carlo simulations, aiming at maximizing the neutron flux, reducing the beam halo and minimizing the background from neutrons interacting with the collimator or back-scattered in the beam dump. The present paper gives an overview on the design of the beam line and the relevant elements and provides an outlook on the expected performance regarding the neutron beam intensity, shape and energy resolution, as well as the neutron and photon backgrounds., Engineering & Physical Sciences Research Council (EPSRC) EP/I003258/1, Science & Technology Facilities Council (STFC) ST/L005794/1 ST/J000159/1

312. High accuracy 234U(n,f) cross section in the resonance energy region

Author: A. R. García, A. Mallick, G. Vannini, N. Kivel, E. Chiaveri, D. Cano-Ott, M. A. Cortés-Giraldo, M. Brugger, Gilles Noguere, M. Weigand, F. Belloni, C. Lampoudis, A. Pavlik, P. Gurusamy, C. Domingo-Pardo, Rene Reifarth, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, A. Hernández-Prieto, G. Cortes, I. F. Gonçalves, A. Riego, Alfredo Ferrari, D. Tarrío, E. Leal-Cidoncha, C. Eleftheriadis, T. Wright, M. Kokkoris, Thomas Rauscher, F. Cerutti, M. Meaze, M. J. Vermeulen, A. Manousos, P. Vaz, D. Karadimos, D. G. Jenkins, Srinivasan Ganesan, P. Schillebeeckx, Alberto Ventura, S. Altstadt, C. Le Naour, R. Vlastou, E. González-Romero, M. P. W. Chin, G. Tagliente, Luiz Leal, M. B. Gómez-Hornillos, Christoph Langer, M. Sabaté-Gilarte, V. Bécares, Alberto Mengoni, J. Billowes, Damir Bosnar, Mario Barbagallo, D. Schumann, Y. Kadi, E. Jericha, W. Mondelaers, F. Käppeler, F. Roman, Javier Praena, E. Mendoza, I. Duran, S. Valenta, M. S. Robles, Marco Calviani, K. Fraval, V. Variale, C. Lederer, Roberto Versaci, M. Diakaki, M. Mastromarco, C. Weiß, F. Bečvář, A. Saxena, M. Krtička, C. Carrapiço, Anton Wallner, Jeri Kroll, R. Dressler, J. L. Tain, R. Sarmento, S. Schmidt, T. Martinez, T. Ware, E. Griesmayer, A. J. M. Plompen, J. Marganiec, Petar Žugec, P. F. Mastinu, E. Berthoumieux, L. Audouin, Carlos Guerrero, C. Paradela, M. Mirea, A. Tsinganis, Nicola Colonna, L.S. Leong, R. Losito, F. Mingrone, J. Andrzejewski, Carlo Rubbia, V. Vlachoudis, P. M. Milazzo, G. Giubrone, F. Gunsing, Cristian Massimi, F. Calviño, H. Leeb, J. Perkowski, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Leal-Cidoncha, E., Durán, I., Paradela, C., Tassan-Got, L., Audouin, L., Leal, L.C., Naour, C. Le, Noguere, G., Tarrío, D., Leong, L.S., Altstadt, S., Andrzejewski, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Lederer, C., Leeb, H., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Roman, F., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., Ugec, P., 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 Radioprotection et de Sûreté Nucléaire (IRSN), CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), 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 Radioprotection et de Sûreté Nucléaire ( IRSN ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay
Subjects: Nuclear reaction, Fission, nTOF, QC1-999, Analytical chemistry, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Resonance (particle physics), Fissió nuclear, Subatomär fysik, Cross section (physics), Physics and Astronomy (all), Nuclear magnetic resonance, Neutron flux, Subatomic Physics, 0103 physical sciences, CERN, ddc:530, Nuclear Physics - Experiment, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, Chemistry, Physics, Nuclear fission, 13. Climate action, Energy (signal processing)
Abstract: New results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) obtained with SAMMY by L. C. Leal et al. (these Proceedings), based on previous n-TOF data [1], has been used to calculate the 234U(n,f) cross section through the 234U/235U ratio, being here compared with the results obtained by using the n-TOF neutron flux. © The Authors, published by EDP Sciences, 2017.

313. Fission fragment angular distribution measurements of U-235 and U-238 at CERN n_TOF facility

Author: F. Gunsing, Cristian Massimi, A. R. García, D. Bosnar, Srinivasan Ganesan, G. Cortes, M. Brugger, Mario Barbagallo, M. B. Gómez-Hornillos, Christoph Langer, Carlos Guerrero, M. S. Robles, A. Ventura, J. L. Tain, G. Giubrone, M. P. W. Chin, D. G. Jenkins, I. F. Gonçalves, D. Cano-Ott, P. Gurusamy, P. E. Koehler, M. Diakaki, F. Roman, Javier Praena, S. Lo Meo, Rene Reifarth, J. Marganiec, C. Lampoudis, F. Mingrone, A. Pavlik, J. Andrzejewski, Stefan Schmidt, C. Domingo-Pardo, C. Paradela, A. Manousos, M. A. Cortés-Giraldo, Niko Kivel, E. Jericha, Y. Kadi, L. Audouin, G. Tagliente, Dorothea Schumann, E. Chiaveri, Vittorio Boccone, P. F. Mastinu, E. Leal-Cidoncha, J. M. Quesada, C. Eleftheriadis, A. Mallick, G. Vannini, L. Tassan-Got, P. M. Milazzo, S. Valenta, Thomas Rauscher, I. Duran, C. Weiß, Marco Calviani, D. Karadimos, W. Mondelaers, A. Hernández-Prieto, P. Vaz, E. González-Romero, T. Ware, F. Cerutti, V. Variale, E. Griesmayer, M. Krtička, F. Calviño, Roberto Versaci, Alberto Mengoni, Diego Tarrio, T. Martinez, M. J. Vermeulen, F. Käppeler, C. Rubbia, M. Sabaté-Gilarte, Petar Žugec, M. Meaze, R. Vlastou, E. Berthoumieux, T. J. Wright, M. Kokkoris, M. Mastromarco, C. Carrapiço, Anton Wallner, A. K. Saxena, Arnaud Ferrari, J. Billowes, Rugard Dressler, K. Fraval, A. Tsinganis, Nicola Colonna, L.S. Leong, Vasilis Vlachoudis, Roberto Losito, V. Bécares, F. Bečvář, E. Mendoza, A. Riego, Peter Schillebeeckx, N. Dzysiuk, C. Lederer, S. Altstadt, A. J. M. Plompen, Jeri Kroll, R. Sarmento, M. Mirea, H. Leeb, J. Perkowski, Mario Weigand, F. Belloni, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Ventura, A., Mengoni, A., Lo Meo, S., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Serot, O., Leal-Cidoncha, E., Durán, I., Paradela, C., Tarrío, D., Leong, L.S., Tassan-Got, L., Audouin, L., Altstadt, S., Andrzejewski, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Lederer, C., Leeb, H., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Roman, F., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.
Subjects: neutron, fission, Fission, nTOF, Computer science, QC1-999, Nuclear Theory, Mechanical engineering, Neutron, 01 natural sciences, Fissió nuclear, Subatomär fysik, Nuclear physics, Cross section (physics), Subatomic Physics, 0103 physical sciences, CERN, ddc:530, 010306 general physics, Nuclear Experiment, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Range (particle radiation), Large Hadron Collider, Cross section, 010308 nuclear & particles physics, Physics, Fission fragments, Nuclear fission, Observable, Excited state
Abstract: Neutron-induced fission cross sections of 238U and 235U are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection effciency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process. In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n-TOF facility. In this work, we present the preliminary results on the analysis of new 235U(n,f) and 238U(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data. © Owned by the authors, published by EDP Sciences, 2016.

314. The CERN n_TOF facility: a unique tool for nuclear data measurement

Author: Rene Reifarth, G. Cortes, Stefan Schmidt, K. Rajeev, J. L. Tain, D. Bosnar, Francesca Matteucci, D. Cano-Ott, J. M. Quesada, L. Tassan-Got, M. Diakaki, Niko Kivel, A. Oprea, J. Marganiec, M. Bacak, E. Jericha, Paolo Finocchiaro, T. Glodariu, Roberto Losito, A. Kimura, Srinivasan Ganesan, A. García-Rios, Dorothea Schumann, G. Vannini, F. Gunsing, J. A. Ryan, D. M. Castelluccio, J. Andrzejewski, C. Rubbia, E. Dupont, O. Aberle, M. Caamaño, Ariel Tarifeño-Saldivia, S. J. Lonsdale, A. Pavlik, Cristian Massimi, R. Vlastou, Tatsuya Katabuchi, A. Ventura, Rugard Dressler, A. Mengoni, C. Domingo-Pardo, E. Berthoumieux, S. Montesano, S. Barros, A. Tsinganis, G. Tagliente, I. F. Gonçalves, A. Stamatopoulos, A. K. Saxena, V. Ketlerov, Vasilis Vlachoudis, F. Cerutti, S. Valenta, D. Macina, Carlos Guerrero, Marco Calviani, V. Khryachkov, A. Ferrari, A. G. Smith, Ioana Gheorghe, E. Leal-Cidoncha, P. M. Milazzo, P. Vaz, Pedro G. Ferreira, A. Gawlik, Petar Žugec, Thomas Rauscher, Mario Weigand, J. Billowes, Philip Woods, J. Lerendegui, F. Bečvář, M. A. Cortés-Giraldo, M. Mirea, M. Brugger, C. Wolf, Emilio Andrea Maugeri, C. Beinrucker, M. Kokkoris, Y. Kadi, R. Cardella, F. Calviño, E. Mendoza, S. Heinitz, H. Leeb, M. Sabaté-Gilarte, J. Perkowski, Javier Praena, S. Lo Meo, I. Duran, Peter Schillebeeckx, Claudia Lederer-Woods, P. V. Sedyshev, V. Bécares, J. Balibrea-Correa, P. Kavrigin, Ralf Nolte, E. Griesmayer, L. A. Damone, S. Warren, V. Variale, E. Chiaveri, P. F. Mastinu, M. Krtička, T. Martinez, N. Colonna, Y. H. Chen, E. González, B. Fernández-Domínguez, F. Käppeler, Kathrin Göbel, Jan Heyse, L. Audouin, L. Cosentino, A. Goverdovski, N. Patronis, C. Weiss, A. Casanovas, P. C. Rout, F. Mingrone, M. Mastromarco, A. Musumarra, V. Furman, T. J. Wright, Massimo Barbagallo, Tanja Heftrich, Anton Wallner, A. Riego-Perez, G. Jenkins, Hideo Harada, 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, Kawano, T., Mingrone, F., 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., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y., Chiaveri, E., Colonna, N., Cortés-Giraldo, M.A., Cortés, G., Cosentino, L., Damone, L., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Ganesan, S., Garcia-Rios, A.A., Gawlik, A., Gheorghe, I., Glodariu, T., Gonçalves, I.F., Gonzàlez, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Göbel, K., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, 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., Lo Meo, S., Lonsdale, S., 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., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Praena, J., Quesada, J.M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P., 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 Žugec, P.
Subjects: inorganic chemicals, Nuclear technologies, High intensity instantaneous neutron flux, QC1-999, Nuclear data measurement, Nuclear Theory, Neutron-nucleus cross-sections, Neutrons--Mesurament, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Physics and Astronomy (all), Neutron flux, 0103 physical sciences, Nuclear resonances, ddc:530, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment, CERN n_TOF facility, Energies::Energia nuclear [Àrees temàtiques de la UPC], integumentary system, 010308 nuclear & particles physics, Neutrons--Measurement, Physics, technology, industry, and agriculture, Compound-nucleus reaction mechanism, Neutron-nucleus reactions, biological sciences, lipids (amino acids, peptides, and proteins), Nuclear astrophysics
Abstract: The study of the resonant structures in neutron-nucleus cross-sections, and therefore of the compoundnucleus reaction mechanism, requires spectroscopic measurements to determine with high accuracy the energy of the neutron interacting with the material under study. To this purpose, the neutron time-of-flight facility n_TOF has been operating since 2001 at CERN. Its characteristics, such as the high intensity instantaneous neutron flux, the wide energy range from thermal to few GeV, and the very good energy resolution, are perfectly suited to perform highquality measurements of neutron-induced reaction cross sections. The precise and accurate knowledge of these cross sections plays a fundamental role in nuclear technologies, nuclear astrophysics and nuclear physics. Two different measuring stations are available at the n_TOF facility, called EAR1 and EAR2, with different characteristics of intensity of the neutron flux and energy resolution. These experimental areas, combined with advanced detection systems lead to a great flexibility in performing challenging measurement of high precision and accuracy, and allow the investigation isotopes with very low cross sections, or available only in small quantities, or with very high specific activity. The characteristics and performances of the two experimental areas of the n_TOF facility will be presented, together with the most important measurements performed to date and their physics case. In addition, the significant upcoming measurements will be introduced.

315. High precision measurement of the radiative capture cross section of 238U at the n_TOF CERN facility

Author: I. Duran, Rugard Dressler, A. Mallick, M. Kokkoris, G. Vannini, S. Valenta, D. G. Jenkins, W. Mondelaers, Marco Calviani, A. Tsinganis, M. B. Gómez-Hornillos, Nicola Colonna, Christoph Langer, V. Variale, Vasilis Vlachoudis, M. Krtička, G. Giubrone, Jeri Kroll, M. A. Cortés-Giraldo, Javier Praena, T. Martinez, A. K. Saxena, A. Goverdovski, Srinivasan Ganesan, T. Ware, Arnaud Ferrari, J. Marganiec, G. Cortes, E. Griesmayer, D. Tarrío, J. Andrzejewski, E. Chiaveri, Damir Bosnar, Y. Kadi, P. F. Mastinu, J. Billowes, A. Hernández-Prieto, L. S. Leong, Mario Weigand, Mario Barbagallo, Petar Žugec, Tanja Heftrich, M. Sabaté-Gilarte, F. Cerutti, P. E. Koehler, A. Riego-Perez, G. Tagliente, C. Carrapiço, F. Gunsing, Roberto Losito, Rene Reifarth, M. J. Vermeulen, Kathrin Göbel, Stefan Schmidt, S. Altstadt, A. J. M. Plompen, Cristian Massimi, E. Jericha, K. Fraval, Vittorio Boccone, Jan Heyse, J. M. Quesada, L. Tassan-Got, C. Paradela, P. V. Sedyshev, L. Audouin, Dorothea Schumann, M. Mirea, F. Mingrone, C. Weiss, J. A. Ryan, C. Lederer, F. Calviño, H. Leeb, V. Bécares, J. Perkowski, Carlos Guerrero, Tatsuya Katabuchi, M. Mastromarco, P. M. Milazzo, J. Lerendegui-Marco, Anton Wallner, F. Bečvář, R. Sarmento, E. Mendoza, R. Vlastou, E. Berthoumieux, I. F. Gonçalves, Peter Schillebeeckx, Fabio Belloni, V. Furman, T. J. Wright, A. R. García, M. Brugger, E. Leal-Cidoncha, C. Eleftheriadis, Ariel Tarifeño-Saldivia, Thomas Rauscher, D. Karadimos, A. Mengoni, M. P. W. Chin, V. Ketlerov, C. Lampoudis, A. Pavlik, C. Domingo-Pardo, P. Vaz, Alberto Ventura, M. S. Robles, D. Cano-Ott, M. Diakaki, A. Manousos, V. Khryachkov, E. González, F. Käppeler, C. Rubbia, J. L. Tain, Niko Kivel, Mingrone, F., 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., Cano-Ott, D., 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., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., 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., Krtička, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., 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., Ž Ugec, P., 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. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, 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), and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Subjects: Nuclear reaction, nTOF, QC1-999, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Cross section (physics), Physics and Astronomy (all), Nuclear reactors, Reactors nuclears, 0103 physical sciences, Thermal, CERN, ddc:530, Nuclear Physics - Experiment, 010306 general physics, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Range (particle radiation), Large Hadron Collider, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, Radiative capture, Nuclear energy, Energia nuclear, Energy (signal processing)
Abstract: The importance of improving the accuracy on the capture cross-section of 238U has been addressed by the Nuclear Energy Agency, since its uncertainty significantly affects the uncertainties of key design parameters for both fast and thermal nuclear reactors. Within the 7th framework programme ANDES of the European Commission three different measurements have been carried out with the aim of providing the 238U(n,γ) cross-section with an accuracy which varies from 1 to 5%, depending on the energy range. Hereby the final results of the measurement performed at the n-TOF CERN facility in a wide energy range from 1 eV to 700 keV will be presented. © The Authors, published by EDP Sciences, 2017.

316. Shedding Light on the Origin of ^{204}Pb, the Heaviest s-Process-Only Isotope in the Solar System.

Author: Casanovas-Hoste A, Domingo-Pardo C, Lerendegui-Marco J, Guerrero C, Tarifeño-Saldivia A, Krtička M, Pignatari M, Calviño F, Schumann D, Heinitz S, Dressler R, Köster U, 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, Caamaño M, Calviani M, Cano-Ott D, Cardella R, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Diakaki M, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik-Ramięga A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Gunsing F, Harada H, Heftrich T, Heyse J, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Katabuchi T, Kavrigin P, Ketlerov V, Khryachkov V, Kimura A, Kivel N, Kokkoris M, Leal-Cidoncha E, Lederer-Woods C, Leeb H, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Romanets Y, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, 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 PJ, Wright T, and Žugec P
Abstract: Asymptotic giant branch stars are responsible for the production of most of the heavy isotopes beyond Sr observed in the solar system. Among them, isotopes shielded from the r-process contribution by their stable isobars are defined as s-only nuclei. For a long time the abundance of ^{204}Pb, the heaviest s-only isotope, has been a topic of debate because state-of-the-art stellar models appeared to systematically underestimate its solar abundance. Besides the impact of uncertainties from stellar models and galactic chemical evolution simulations, this discrepancy was further obscured by rather divergent theoretical estimates for the neutron capture cross section of its radioactive precursor in the neutron-capture flow, ^{204}Tl (t_{1/2}=3.78 yr), and by the lack of experimental data on this reaction. We present the first ever neutron capture measurement on ^{204}Tl, conducted at the CERN neutron time-of-flight facility n_TOF, employing a sample of only 9 mg of ^{204}Tl produced at the Institute Laue Langevin high flux reactor. By complementing our new results with semiempirical calculations we obtained, at the s-process temperatures of kT≈8 keV and kT≈30 keV, Maxwellian-averaged cross sections (MACS) of 580(168) mb and 260(90) mb, respectively. These figures are about 3% lower and 20% higher than the corresponding values widely used in astrophysical calculations, which were based only on theoretical calculations. By using the new ^{204}Tl MACS, the uncertainty arising from the ^{204}Tl(n,γ) cross section on the s-process abundance of ^{204}Pb has been reduced from ∼30% down to +8%/-6%, and the s-process calculations are in agreement with the latest solar system abundance of ^{204}Pb reported by K. Lodders in 2021.
Published: 2024
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317. Neutron Capture on the s-Process Branching Point ^{171}Tm via Time-of-Flight and Activation.

Author: Guerrero C, Lerendegui-Marco J, Paul M, Tessler M, Heinitz S, Domingo-Pardo C, Cristallo S, Dressler R, Halfon S, Kivel N, Köster U, Maugeri EA, Palchan-Hazan T, Quesada JM, Rochman D, Schumann D, Weissman L, Aberle O, Amaducci S, Andrzejewski J, Audouin L, Bécares V, Bacak M, Balibrea J, Barak A, Barbagallo M, Barros S, Bečvář F, Beinrucker C, Berkovits D, Berthoumieux E, Billowes J, Bosnar D, Brugger M, Buzaglo Y, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Dafna H, Damone A, Diakaki M, Dietz M, Dupont E, Durán I, Eisen Y, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Gunsing F, Harada H, Heftrich T, Heyse J, Hirsh T, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Kaizer B, Katabuchi T, Kavrigin P, Ketlerov V, Khryachkov V, Kijel D, Kimura A, Kokkoris M, Kriesel A, Krtička M, Leal-Cidoncha E, Lederer-Woods C, Leeb H, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Manna A, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Mendoza E, Mengoni A, Milazzo PM, Millán-Callado MA, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Piersanti L, Porras I, Praena J, Rajeev K, Rauscher T, Reifarth R, Rodríguez-González T, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Shor A, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, 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 PJ, Wright T, and Žugec P
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
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318. ^{7}Be(n,p)^{7}Li Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN.

Author: Damone L, Barbagallo M, Mastromarco M, Mengoni A, Cosentino L, Maugeri E, Heinitz S, Schumann D, Dressler R, Käppeler F, Colonna N, Finocchiaro P, Andrzejewski J, Perkowski J, Gawlik A, Aberle O, Altstadt S, Ayranov M, Audouin L, Bacak M, Balibrea-Correa J, Ballof J, Bécares V, Bečvář F, Beinrucker C, Bellia G, Bernardes AP, Berthoumieux E, Billowes J, Borge MJG, Bosnar D, Brown A, Brugger M, Busso M, Caamaño M, Calviño F, Calviani M, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Catherall R, Cerutti F, Chen YH, Chiaveri E, Correia JGM, Cortés G, Cortés-Giraldo MA, 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, García-Rios A, Gilardoni S, Glodariu T, Göbel K, Gonçalves IF, González-Romero E, Goodacre TD, Griesmayer E, Guerrero C, Gunsing F, Harada H, Heftrich T, Heyse J, Jenkins DG, Jericha E, Johnston K, Kadi Y, Kalamara A, Katabuchi T, Kavrigin P, Kimura A, Kivel N, Köster U, Kokkoris M, Krtička M, Kurtulgil D, Leal-Cidoncha E, Lederer-Woods C, Leeb H, Lerendegui-Marco J, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Marganiec J, Marsh B, Martínez T, Masi A, Massimi C, Mastinu P, Matteucci F, Mazzone A, Mendoza E, Milazzo PM, 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 JM, Radeck D, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Rothe S, Rout P, Rubbia C, Ryan J, Sabaté-Gilarte M, Saxena A, Schell J, Schillebeeckx P, Schmidt S, Sedyshev P, Seiffert C, Smith AG, Sosnin NV, Stamatopoulos A, Stora T, Tagliente G, Tain JL, 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 PJ, Wright T, and Žugec P
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 they 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. The relevance of these results on the near-threshold neutron production in the p+^{7}Li reaction is also discussed.
Published: 2018
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319. ^{7}Be(n,α)^{4}He Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN.

Author: Barbagallo M, Musumarra A, Cosentino L, Maugeri E, Heinitz S, Mengoni A, Dressler R, Schumann D, Käppeler F, Colonna N, Finocchiaro P, Ayranov M, Damone L, Kivel N, Aberle O, Altstadt S, Andrzejewski J, Audouin L, Bacak M, Balibrea-Correa J, Barros S, Bécares V, Bečvář F, Beinrucker C, Berthoumieux E, Billowes J, Bosnar D, Brugger M, Caamaño M, Calviani M, Calviño F, Cano-Ott D, Cardella R, Casanovas A, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Cortés G, Cortés-Giraldo MA, Cristallo S, Diakaki M, Domingo-Pardo C, Dupont E, Duran I, Fernandez-Dominguez B, Ferrari A, Ferreira P, Furman W, Ganesan S, García-Rios A, Gawlik A, Glodariu T, Göbel K, Gonçalves IF, González-Romero E, Griesmayer E, Guerrero C, Gunsing F, Harada H, Heftrich T, Heyse J, Jenkins DG, Jericha E, Katabuchi T, Kavrigin P, Kimura A, Kokkoris M, Krtička M, Leal-Cidoncha E, Lerendegui J, Lederer C, Leeb H, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Mazzone A, Mendoza E, Milazzo PM, Mingrone F, Mirea M, Montesano S, Nolte R, Oprea A, Pappalardo A, Patronis N, Pavlik A, Perkowski J, Piscopo M, Plompen A, Porras I, Praena J, Quesada J, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Rout P, Rubbia C, Ryan J, Sabate-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Vollaire J, Wallner A, Warren S, Weigand M, Weiß C, Wolf C, Woods PJ, Wright T, and Žugec P
Abstract: The energy-dependent cross section of the ^{7}Be(n,α)^{4}He 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 ^{7}Be 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 ^{7}Be, and a specifically designed experimental setup. Coincidences between the two alpha particles have been recorded in two Si-^{7}Be-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
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319 results on '"Bécares, V."'

301. Experimental neutron capture data of 58Ni from the CERN n-TOF facility

302. The measurement programme at the neutron time-of-flight facility n_TOF at CERN

303. The nucleosynthesis of heavy elements in Stars: the key isotope 25Mg

304. Measurements of neutron cross sections for advanced nuclear energy systems at n-TOF (CERN)

305. Neutron cross-sections for advanced nuclear systems: The n-TOF project at CERN

306. 238U(n, gamma) reaction cross section measurement with C6D6 detectors at the n_TOF CERN facility

307. Performance of the neutron time-of-flight facility n_TOF at CERN

308. Angular distribution in the neutron-induced fission of actinides

309. Simultaneous measurement of neutron-induced capture and fission reactions at CERN

310. Measurement of the radiative capture cross section of the s-process branching points 204Tl and 171Tm at the n_TOF facility (CERN)

311. The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance

312. High accuracy 234U(n,f) cross section in the resonance energy region

313. Fission fragment angular distribution measurements of U-235 and U-238 at CERN n_TOF facility

314. The CERN n_TOF facility: a unique tool for nuclear data measurement

315. High precision measurement of the radiative capture cross section of 238U at the n_TOF CERN facility

316. Shedding Light on the Origin of ^{204}Pb, the Heaviest s-Process-Only Isotope in the Solar System.

317. Neutron Capture on the s-Process Branching Point ^{171}Tm via Time-of-Flight and Activation.

318. ^{7}Be(n,p)^{7}Li Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN.

319. ^{7}Be(n,α)^{4}He Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN.

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