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24 results on '"Tsinganis, A."'

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

Author

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

Subjects
Nuclear reaction, Physics, 010308 nuclear & particles physics, Fission, 01 natural sciences, Calorimeter, Nuclear physics, Cross section (physics), Neutron capture, Neutron flux, Nuclear fission, 0103 physical sciences, Neutron, 010306 general physics
Abstract

We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of $^{235}$U between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF$_{2}$ Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the $^{6}$Li(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the $^{235}$U(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of $^{235}$U performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

Published
2020

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

Author

M. Bacak, S. Heinitz, Y. Kadi, C. Petrone, O. Aberle, M. A. Millán-Callado, J. L. Tain, G. Cortes, M. Mastromarco, Z. Eleme, G. Vannini, M. Caamaño, P. J. Davies, A. Masi, S. Valenta, B. Fernández-Domíngez, Massimo Barbagallo, Anton Wallner, A. S. Brown, D. G. Jenkins, Marco Calviani, Rene Reifarth, B. Thomas, A. G. Smith, Alexandru Negret, J. Andrzejewski, A. Oprea, L. Audouin, F. Cerutti, F. Käppeler, J. M. Quesada, L. Tassan-Got, Emilio Andrea Maugeri, Rugard Dressler, M. Dietz, P. M. Milazzo, D. Bosnar, M. Kokkoris, V. Babiano-Suarez, Sergio Cristallo, M. A. Cortés-Giraldo, V. Alcayne, C. Rubbia, A. Tsinganis, Luciano Piersanti, A. Kimura, F. Ogállar, P. J. Woods, T. Martinez, E. Jericha, Paolo Finocchiaro, A. Manna, Nicola Colonna, E. Dupont, R. Vlastou, Vasilis Vlachoudis, Y. Kopatch, Dorothea Schumann, J. Moreno-Soto, N. Patronis, A. K. Saxena, I. Ferro-Gonçalves, Simone Gilardoni, I. Duran, G. Tagliente, Q. Ducasse, Arnaud Ferrari, L. Caballero, E. Berthoumieux, I. Ladarescu, Kathrin Göbel, U. Jiri, D. Ramos Doval, Jan Heyse, E. Chiaveri, P. F. Mastinu, A. Casanovas, D. Cano-Ott, S. Urlass, S. Bennett, A. Sekhar, M. Diakaki, A. Stamatopoulos, A. Gawlik, Javier Praena, L. Cosentino, V. Furman, T. J. Wright, N. V. Sosnin, I. Knapova, P. Vaz, Annamaria Mazzone, Petar Žugec, L. A. Damone, P. Sprung, Alberto Ventura, F. Calviño, A. Pavlik, C. Domingo-Pardo, E. Pirovano, V. Michalopoulou, J. Perkowski, E. Mendoza, E. González-Romero, F. Gunsing, Peter Schillebeeckx, Cristian Massimi, A. Mengoni, D. Macina, Carlos Guerrero, R. Garg, M. Krticˇka, Claudia Lederer-Woods, P. Torres-Sánchez, Deniz Kurtulgil, M. Sabaté-Gilarte, Maurizio Busso, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Ignacio Porras, Diego Vescovi, J. Lerendegui-Marco, S. Amaducci, A. Musumarra, F. Mingrone, V. Variale, Dimitri Rochman, Arnd R. Junghans, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.

Subjects
Large Hadron Collider, Materials science, Nuclear transmutation, Isotope, 010308 nuclear & particles physics, n_TOF, 241Am, fission, neutron time of flight, 4. Education, Nuclear engineering, Physics, QC1-999, Radioactive waste, MicroMegas detector, Actinide, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Incineration, 13. Climate action, Neutron flux, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics
Abstract

This research is co-financed by Greece and the European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning in the context of the project "Strengthening Human Resources Research Potential via Doctorate Research" (MIS-5000432), implemented by the State Scholarships Foundation (IKY). Also, the authors would like to acknowledge the support of the European Commission under the CHANDA project (7th Framework Programme)., Feasibility, design and sensitivity studies on innovative nuclear reactors that could address the issue of nuclear waste transmutation using fuels enriched in minor actinides, require high accuracy cross section data for a variety of neutron-induced reactions from thermal energies to several tens of MeV. The isotope Am-241 (T-1/2= 433 years) is present in high-level nuclear waste (HLW), representing about 1.8 % of the actinide mass in spent PWR UOx fuel. Its importance increases with cooling time due to additional production from the beta-decay of Pu-241 with a half-life of 14.3 years. The production rate of 241Am in conventional reactors, including its further accumulation through the decay of Pu-241 and its destruction through transmutation/incineration are very important parameters for the design of any recycling solution. In the present work, the Am-241(n,f) reaction cross-section was measured using Micromegas detectors at the Experimental Area 2 of the n_TOF facility at CERN. For the measurement, the U-235(n,f) and U-238(n,f) reference reactions were used for the determination of the neutron flux. In the present work an overview of the experimental setup and the adopted data analysis techniques is given along with preliminary results., European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning MIS-5000432, European Commission under the CHANDA project (7th Framework Programme)

Published
2020

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

Author

D. Bosnar, Rugard Dressler, A. Tsinganis, N. V. Sosnin, S. Bennett, A. Stamatopoulos, Luciano Piersanti, Nicola Colonna, Annamaria Mazzone, Petar Žugec, Z. Eleme, P. Sprung, F. Ogállar, A. Kimura, G. Cortes, A. Masi, V. Variale, O. Aberle, G. Tagliente, Dimitri Rochman, Arnd R. Junghans, A. Pavlik, D. Ramos Doval, D. G. Jenkins, E. Jericha, Y. Kopatch, C. Domingo-Pardo, M. A. Millán-Callado, Maurizio Busso, L. Audouin, M. Krtička, Emilio Andrea Maugeri, M. Kokkoris, Paolo Finocchiaro, Dorothea Schumann, E. Pirovano, T. Martinez, Rene Reifarth, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. A. Cortés-Giraldo, A. Casanovas, Alexandru Negret, F. Cerutti, M. Bacak, A. S. Brown, P. J. Woods, Ignacio Porras, F. Käppeler, J. Andrzejewski, I. Knapova, Y. Kadi, J. M. Quesada, D. Cano-Ott, A. Sekhar, M. Diakaki, P. Vaz, F. Gunsing, I. Ferro-Gonçalves, G. Vannini, L. Cosentino, V. Vlachoudis, F. Mingrone, Cristian Massimi, L. Tassan-Got, Simone Gilardoni, N. Patronis, Sergio Cristallo, A. K. Saxena, Arnaud Ferrari, Alberto Mengoni, I. Ladarescu, Diego Vescovi, V. Furman, T. J. Wright, Claudia Lederer-Woods, M. Caamaño, V. Michalopoulou, E. Mendoza, B. Fernández-Domíngez, A. Oprea, Alberto Ventura, P. M. Milazzo, J. Lerendegui-Marco, S. Amaducci, U. Jiri, L. Caballero, Peter Schillebeeckx, Kathrin Göbel, Deniz Kurtulgil, J. Moreno-Soto, R. Vlastou, E. Berthoumieux, P. J. Davies, Jan Heyse, A. Musumarra, E. Chiaveri, F. Calviño, P. F. Mastinu, C. Rubbia, J. Perkowski, Javier Praena, S. Heinitz, C. Petrone, Q. Ducasse, J. L. Tain, D. Macina, Carlos Guerrero, S. Valenta, R. Garg, Marco Calviani, A. G. Smith, M. Dietz, S. Urlass, V. Babiano-Suarez, A. Manna, A. Gawlik, E. González-Romero, P. Torres-Sánchez, M. Mastromarco, Massimo Barbagallo, Anton Wallner, M. Sabaté-Gilarte, I. Duran, L. A. Damone, B. Thomas, V. Alcayne, E. Dupont, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.

Subjects
Large Hadron Collider, Computer science, Physics, QC1-999, 020209 energy, Nuclear engineering, Nuclear Theory, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutron temperature, Nuclear technology, Upgrade, Neutron flux, 0103 physical sciences, n_TOF, CERN, neutron time of flight, 0202 electrical engineering, electronic engineering, information engineering, Neutron cross section, Nuclear astrophysics, Nuclear Physics - Experiment, Neutron, 010306 general physics, Nuclear Experiment
Abstract

International audience; Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia [1], the neutron time of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for wide-energy spectrum neutron cross section measurements. Thanks to the combination of excellent neutron energy resolution and high instantaneous neutron flux available in the two experimental areas, the second of which has been constructed in 2014, n_TOF is providing a wealth of new data on neutron-induced reactions of interest for nuclear astrophysics, advanced nuclear technologies and medical applications. The unique features of the facility will continue to be exploited in the future, to perform challenging new measurements addressing the still open issues and long-standing quests in the field of neutron physics. In this document the main characteristics of the n_TOF facility and their relevance for neutron studies in the different areas of research will be outlined, addressing the possible future contribution of n_TOF in the fields of nuclear astrophysics, nuclear technologies and medical applications. In addition, the future perspectives of the facility will be described including the upgrade of the spallation target, the setup of an imaging installation and the construction of a new irradiation area.

Published
2020

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

Author

Z. Eleme, M. Bacak, N. V. Sosnin, S. Urlass, Annamaria Mazzone, Petar Žugec, Alexandru Negret, J. Moreno-Soto, F. Käppeler, P. Sprung, Rugard Dressler, C. Rubbia, P. Torres-Sánchez, A. Tsinganis, E. Dupont, E. Pirovano, V. Michalopoulou, J. Andrzejewski, Luciano Piersanti, E. Mendoza, Nicola Colonna, Q. Ducasse, Vasilis Vlachoudis, A. Mengoni, Peter Schillebeeckx, M. Sabaté-Gilarte, Diego Vescovi, D. Macina, Carlos Guerrero, I. Duran, Simone Gilardoni, R. Garg, S. Valenta, Marco Calviani, J. L. Tain, Emilio Andrea Maugeri, V. Variale, Dimitri Rochman, Arnd R. Junghans, S. Bennett, S. Heinitz, A. G. Smith, M. Dietz, M. Kokkoris, V. Furman, T. J. Wright, M. A. Cortés-Giraldo, D. Cano-Ott, A. Stamatopoulos, C. Petrone, A. Pavlik, V. Babiano-Suarez, R. Vlastou, A. Sekhar, M. Diakaki, E. Berthoumieux, U. Jiri, Claudia Lederer-Woods, Deniz Kurtulgil, C. Domingo-Pardo, E. Chiaveri, P. F. Mastinu, F. Calviño, A. Kimura, B. Fernández-Domíngez, A. Oprea, M. Mastromarco, L. Cosentino, B. Thomas, Y. Kadi, A. Musumarra, Maurizio Busso, Massimo Barbagallo, J. Perkowski, A. Manna, P. J. Woods, Kathrin Göbel, F. Gunsing, Anton Wallner, Ariel Tarifeño-Saldivia, S. J. Lonsdale, N. Patronis, A. K. Saxena, Jan Heyse, F. Ogállar, J. Lerendegui-Marco, Cristian Massimi, Arnaud Ferrari, V. Alcayne, F. Cerutti, L. A. Damone, S. Amaducci, G. Tagliente, D. Ramos Doval, I. Ferro-Gonçalves, I. Ladarescu, G. Cortes, D. Bosnar, F. Mingrone, A. Masi, Y. Kopatch, M. Krtička, A. Casanovas, D. G. Jenkins, Javier Praena, T. Martinez, Ignacio Porras, L. Audouin, G. Vannini, I. Knapova, M. Caamaño, P. Vaz, P. J. Davies, Alberto Ventura, L. Caballero, O. Aberle, M. A. Millán-Callado, A. Gawlik, E. González-Romero, Rene Reifarth, J. M. Quesada, L. Tassan-Got, Sergio Cristallo, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, A. S. Brown, N. Terranova, P. M. Milazzo, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.

Subjects
Physics, 010308 nuclear & particles physics, Scattering, Fission, QC1-999, Monte Carlo method, Nuclear Theory, n_TOF, proton recoil, Monte Carlo simulations, neutron time of flight, Neutron radiation, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Recoil, Neutron flux, Proton transport, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment
Abstract

The authors wish to thank the National Center of the INFN for Research and Development in Information and Communication Technologies (CNAF) for their computational support., The neutron-induced fission cross section of U-235, a standard at thermal energy and between 0.15 MeV and 200 MeV, plays a crucial role in nuclear technology applications. The long-standing need of improving cross section data above 20 MeV and the lack of experimental data above 200 MeV motivated a new experimental campaign at the n_TOF facility at CERN. The measurement has been performed in 2018 at the experimental area 1 (EAR1), located at 185 m from the neutron-producing target (the experiment is presented by A. Manna et al. in a contribution to this conference). The U-235(n,f) cross section from 20 MeV up to about 1 GeV has been measured relative to the H-1(n,n)H-1 reaction, which is considered the primary reference in this energy region. The neutron flux impinging on the U-235 sample (a key quantity for determining the fission events) has been obtained by detecting recoil protons originating from n-p scattering in a C2H4 sample. Two Proton Recoil Telescopes (PRT), consisting of several layers of solid-state detectors and fast plastic scintillators, have been located at proton scattering angles of 25.07 degrees and 20.32 degrees, out of the neutron beam. The PRTs exploit the Delta E-E technique for particle identification, a basic requirement for the rejection of charged particles from neutron-induced reactions in carbon. Extensive Monte Carlo simulations were performed to characterize proton transport through the different slabs of silicon and scintillation detectors, to optimize the experimental set-up and to deduce the efficiency of the whole PRT detector. In this work we compare measured data collected with the PRTs with a full Monte Carlo simulation based on the Geant-4 toolkit.

Published
2020

5. The n_TOF facility: Neutron beams for challenging future measurements at CERN

Author

A. Kalamara, J. Marganiec, L. Cosentino, J. Lerendegui-Marco, Emilio Andrea Maugeri, M. Kokkoris, F. Bečvář, N. Patronis, T. J. Wright, A. K. Saxena, D. Cano-Ott, Arnaud Ferrari, Alberto Mengoni, A. Kimura, J. Billowes, I. F. Gonçalves, E. Chiaveri, A. Casanovas, M. Bacak, P. F. Mastinu, Peter Schillebeeckx, G. Vannini, Pedro G. Ferreira, Ignacio Porras, Simone Gilardoni, T. Glodariu, Mario Barbagallo, A. Musumarra, A. Pavlik, P. Kavrigin, Ralf Nolte, Hideo Harada, Kathrin Göbel, A. S. Brown, D. Macina, Carlos Guerrero, M. Sabaté-Gilarte, C. Domingo-Pardo, M. A. Cortés-Giraldo, Alexandru Negret, B. Fernández-Domínguez, F. Käppeler, R. Cardella, E. Griesmayer, G. Tagliente, Jan Heyse, M. Caamaño, M. Diakaki, E. Mendoza, L. A. Damone, F. Calviño, H. Leeb, Y. H. Chen, R. Vlastou, D. Radeck, Rugard Dressler, Ariel Tarifeño-Saldivia, S. J. Lonsdale, O. Aberle, P. M. Milazzo, J. Perkowski, F. Cerutti, E. Berthoumieux, A. Tsinganis, M. Mastromarco, L. Audouin, F. Gunsing, Nicola Colonna, G. Cortes, I. Duran, Deniz Kurtulgil, Vasilis Vlachoudis, Anton Wallner, S. Heinitz, Cristian Massimi, E. Jericha, J. Balibrea, P. Vaz, Paolo Finocchiaro, M. Krtička, A. Oprea, Javier Praena, S. Lo Meo, Dorothea Schumann, A. Stamatopoulos, T. Martinez, N. V. Sosnin, Rene Reifarth, Alberto Ventura, E. Dupont, J. A. Ryan, E. Leal-Cidoncha, Annamaria Mazzone, Petar Žugec, A. Gawlik, Thomas Rauscher, A. Masi, D. G. Jenkins, J. M. Quesada, L. Tassan-Got, E. González, S. Warren, V. Variale, A. R. García, F. Mingrone, C. Lederer, J. Andrzejewski, Damir Bosnar, Y. Kadi, J. L. Tain, S. Valenta, Marco Calviani, Niko Kivel, A. G. Smith, Philip Woods, C. Rubbia, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Chiaveri, E., Aberle, O., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Bečvář, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y.H., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Göbel, K., García, A.R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E.A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Rauscher, T., Reifarth, R., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Woods, P.J., Wright, T., Ugec, P., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Astrofísica, nTOF, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], QC1-999, Nuclear Theory, Neutron, Astrophysics, 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, Physics and Astronomy (all), Neutron flux, law, 0103 physical sciences, CERN, Nuclear astrophysics, Spallation, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Nuclear data, Nuclear reactor, Neutron radiation, Accelerators and Storage Rings, 3. Good health, 13. Climate action
Abstract

The CERN n TOF neutron beam facility is characterized by a very high instantaneous neutron flux, excellent TOF resolution at the 185 m long flight path (EAR-1), low intrinsic background and coverage of a wide range of neutron energies, from thermal to a few GeV. These characteristics provide a unique possibility to perform high-accuracy measurements of neutron-induced reaction cross-sections and angular distributions of interest for fundamental and applied Nuclear Physics. Since 2001, the n TOF Collaboration has collected a wealth of high quality nuclear data relevant for nuclear astrophysics, nuclear reactor technology, nuclear medicine, etc. The overall efficiency of the experimental program and the range of possible measurements has been expanded with the construction of a second experimental area (EAR-2), located 20 m on the vertical of the n TOF spallation target. This upgrade, which benefits from a neutron flux 30 times higher than in EAR- 1, provides a substantial extension in measurement capabilities, opening the possibility to collect data on neutron cross-section of isotopes with short half-lives or available in very small amounts. This contribution will outline the main characteristics of the n TOF facility, with special emphasis on the new experimental area. In particular, we will discuss the innovative features of the EAR-2 neutron beam that make possible to perform very challenging measurements on short-lived radioisotopes or sub-mg samples, out of reach up to now at other neutron facilities around the world. Finally, the future perspectives of the facility will be presented.

Published
2017

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

Author

D. Cano-Ott, A. Pavlik, C. Domingo-Pardo, P. Vaz, Alberto Ventura, G. Vannini, Y. H. Chen, F. Bečvář, M. Caamaño, G. Tagliente, C. Wolf, M. Licata, Peter Schillebeeckx, J. Billowes, V. Bécares, O. Aberle, A. Villacorta, R. J. W. Frost, M. S. Robles, F. Belloni, J. Andrzejewski, M. Bacak, D. G. Jenkins, M. Sabaté-Gilarte, V. Ketlerov, E. Jericha, R. Baccomi, F. R. Palomo-Pinto, E. González, F. Cerutti, M. Diakaki, Paolo Finocchiaro, K. Rajeev, Dorothea Schumann, Francesca Matteucci, Luigi Cosentino, M. A. Cortés-Giraldo, C. Weiss, J. I. Porras, T. Glodariu, Roberto Losito, J. A. Ryan, B. Fernández-Domínguez, A. R. García, F. Käppeler, A. Oprea, Y. Kadi, C. Rubbia, M. Brugger, J. Lerendegui-Marco, N. Patronis, C. Beinrucker, A. K. Saxena, R. Cardella, Hideo Harada, M. Mastromarco, I. F. Gonçalves, E. Leal-Cidoncha, Arnaud Ferrari, V. Khryachkov, A. Gawlik, Anton Wallner, Thomas Rauscher, Rugard Dressler, P. M. Milazzo, J. L. Tain, Javier Praena, S. Lo Meo, J. Balibrea, Niko Kivel, P. Kavrigin, A. Tsinganis, Ralf Nolte, A. Casanovas, M. Piscopo, Nicola Colonna, E. Griesmayer, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Krtička, Emilio Andrea Maugeri, Vasilis Vlachoudis, Tatsuya Katabuchi, S. Valenta, Alberto Mengoni, T. Martinez, Marco Calviani, T. Papaevangelou, M. Kokkoris, S. Barros, A. G. Smith, I. Duran, Philip Woods, A. Hernández-Prieto, L. A. Damone, Rene Reifarth, J. Marganiec, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, E. Chiaveri, G. Cortés, P. F. Mastinu, S. Warren, V. Variale, P. V. Sedyshev, A. Musumarra, K. Deo, D. M. Castelluccio, Tanja Heftrich, A. Riego-Perez, D. Macina, Carlos Guerrero, C. Paradela, S. Heinitz, L. Audouin, Kathrin Göbel, Jan Heyse, V. Furman, T. J. Wright, E. Mendoza, R. Vlastou, E. Berthoumieux, Petar Žugec, A. Kimura, Mario Barbagallo, S. V. Suryanarayana, A. Goverdovski, M. Mirea, F. Calviño, H. Leeb, J. Perkowski, Pedro G. Ferreira, Mario Weigand, F. Gunsing, Cristian Massimi, E. Dupont, Ioana Gheorghe, S. Montesano, A. Stamatopoulos, P. C. Rout, F. Mingrone, C. Lederer, D. Bosnar, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Sabaté-Gilarte, M., Barbagallo, M., Colonna, N., Gunsing, F., Žugec, P., Vlachoudis, V., Chen, Y. H., Stamatopoulos, A., Lerendegui-Marco, J., Cortés-Giraldo, M. A., Villacorta, A., Guerrero, C., Damone, L., Audouin, L., Berthoumieux, E., Cosentino, L., Diakaki, M., Finocchiaro, P., Musumarra, A., Papaevangelou, T., Piscopo, M., Tassan-Got, L., Aberle, O., Andrzejewski, J., Bécares, V., Bacak, M., Baccomi, R., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chiaveri, E., Cortés, G., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Frost, R. J. W., Furman, V., Göbel, K., García, A. R., Gawlik, A., Gheorghe, I., Glodariu, T., Gonçalves, I. F., González, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Licata, M., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Nolte, R., Oprea, A., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M. S., Rout, P. C., Rubbia, C., Ryan, J. A., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wolf, C., Woods, P. J., Weiss, C., Wright, T., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Flux, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, n-tof, Neutron flux, 0103 physical sciences, CERN, Spallation, 010306 general physics, Nuclear Experiment, n_TOF, EAR2, neutron flux measurement, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Neutron radiation, Neutron temperature, Radiation flux, Physics::Accelerator Physics, Beam (structure)
Abstract

A new high flux experimental area has recently become operational at the n_TOF facility at CERN. This new measuring station, n_TOF-EAR2, is placed at the end of a vertical beam line at a distance of approximately 20m from the spallation target. The characterization of the neutron beam, in terms of flux, spatial profile and resolution function, is of crucial importance for the feasibility study and data analysis of all measurements to be performed in the new area. In this paper, the measurement of the neutron flux, performed with different solid-state and gaseous detection systems, and using three neutron-converting reactions considered standard in different energy regions is reported. The results of the various measurements have been combined, yielding an evaluated neutron energy distribution in a wide energy range, from 2meV to 100MeV, with an accuracy ranging from 2%, at low energy, to 6% in the high-energy region. In addition, an absolute normalization of the n_TOF-EAR2 neutron flux has been obtained by means of an activation measurement performed with 197Au foils in the beam. © 2017, SIF, Springer-Verlag GmbH Germany.

Published
2017

7. Measurement of the 236U(n,f) cross section at fast neutron energies with Micromegas Detectors

Author

M. Diakaki, A. Tsinganis, A. Stamatopoulos, M. Kokkoris, A. Lagoyiannis, N. Patronis, R. Vlastou, A. Kalamara, A. Axiotis, and V. Michalopoulou

Subjects
Physics, Fission, QC1-999, Nuclear Theory, Monte Carlo method, Alpha-particle spectroscopy, MicroMegas detector, Neutron radiation, Rutherford backscattering spectrometry, Nuclear physics, Neutron flux, Neutron, Nuclear Experiment
Abstract

In the present work, the measurement of the 236U(n,f) cross section was performed, with reference to the 238U(n,f) reaction. The measurements took place at the neutron beam facility of the National Centre for Scientific Research "Demokritos" (Greece) and the quasi-monoenergetic neutron beams were produced via the 2H(d,n)3He reaction in the energy range 4–10 MeV. Five actinide targets (two 236U, two 238U and one 235U) and the corresponding Micromegas detectors for the detection of the fission fragments were used. Detailed Monte Carlo simulations were performed, on one hand for the study of the neutron flux and energy distribution at the position of each target, and on the other hand for the study of the energy deposition of the fission fragments in the active volume of the detector. The mass and homogeneity of the actinide targets were experimentally determined via alpha spectroscopy and the Rutherford Backscattering Spectrometry, respectively. The experimental procedure, the analysis, the methodology implemented to correct for the presence of parasitic neutrons and the cross section results will be presented and discussed.

Published
2020

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

Author

B. Thomas, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, P. Sprung, M. Bacak, V. Alcayne, Ignacio Porras, M. Krtiička, O. Aberle, A. S. Brown, M. A. Millán-Callado, G. Cortes, V. Variale, Dimitri Rochman, E. Pirovano, Arnd R. Junghans, F. Ogállar, A. Mengoni, G. Tagliente, J. Perkowski, M. Sabaté-Gilarte, J. Andrzejewski, J. Lerendegui-Marco, L. Caballero, S. Amaducci, D. Cano-Ott, P. M. Milazzo, I. Duran, A. Sekhar, M. Diakaki, R. Vlastou, E. Berthoumieux, Y. Kopatch, B. Fernández-Domíngez, E. Dupont, F. Mingrone, A. Casanovas, E. Jericha, Rugard Dressler, A. Oprea, D. Macina, Carlos Guerrero, G. Vannini, Paolo Finocchiaro, L. Cosentino, Dorothea Schumann, S. Bennett, P. Torres-Sánchez, A. Tsinganis, I. Knapova, Alexandru Negret, R. Garg, A. Stamatopoulos, M. Caamaño, S. Heinitz, F. Gunsing, M. Mastromarco, Luciano Piersanti, Nicola Colonna, P. Vaz, Massimo Barbagallo, Cristian Massimi, F. Käppeler, Vasilis Vlachoudis, Anton Wallner, Claudia Lederer-Woods, C. Petrone, P. J. Davies, Maurizio Busso, V. Furman, T. J. Wright, V. Michalopoulou, I. Ferro-Gonçalves, Z. Eleme, Deniz Kurtulgil, Ralf Nolte, Fño Calvi, Alberto Ventura, Emilio Andrea Maugeri, V-Suarez Babiano, E. Mendoza, A. Gawlik, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Peter Schillebeeckx, L. A. Damone, M. Kokkoris, S. Urlass, Rene Reifarth, E. González-Romero, A. Pavlik, C. Domingo-Pardo, D. Ramos, A. Manna, P. J. Woods, N. Patronis, A. K. Saxena, Arnaud Ferrari, I. Ladarescu, J. M. Quesada, L. Tassan-Got, D. Bosnar, Sergio Cristallo, S. Valenta, Marco Calviani, A. G. Smith, M. Dietz, J. Moreno-Soto, Y. Kadi, Simone Gilardoni, U. Jiri, F. Cerutti, Javier Praena, A. Kimura, J. L. Tain, M. A. Cortés-Giraldo, A. Musumarra, T. Martinez, C. Rubbia, E. Chiaveri, P. F. Mastinu, A. Masi, Diego Vescovi, D. G. Jenkins, Q. Ducasse, Kathrin Göbel, Jan Heyse, L. Audouin, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., and Zhang, H.

Subjects
Physics, High energy, Range (particle radiation), 010308 nuclear & particles physics, Scattering, Fission, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Detector, n_TOF, 235U, fission, neutron time of flight, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Cross section (physics), Neutron flux, 0103 physical sciences, Nuclear Physics - Experiment, Neutron, Nuclear Experiment, 010306 general physics
Abstract

The neutron induced fission of 235U is extensively used as a reference for neutron fluence measurements in various applications, ranging from the investigation of the biological effectiveness of high energy neutrons, to the measurement of high energy neutron cross sections of relevance for accelerator driven nuclear systems. Despite its widespread use, no data exist on neutron induced fission of 235U above 200 MeV. The neutron facility n_TOF offers the possibility to improve the situation. The measurement of 235U(n,f) relative to the differential n-p scattering cross-section, was carried out in September 2018 with the aim of providing accurate and precise cross section data in the energy range from 10 MeV up to 1 GeV. In such measurements, Recoil Proton Telescopes (RPTs) are used to measure the neutron flux while the fission events are detected and counted with dedicated detectors. In this paper the measurement campaign and the experimental set-up are illustrated.

Published
2020

9. The Fission Programme at the CERN n_TOF Facility

Author

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

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

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

Published
2015
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10. Integral measurement of the 12C(n, p)12B reaction up to 10 GeV

Author

M. P. W. Chin, F. Roman, A. R. García, M. Brugger, G. Cortes, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, D. Tarrío, A. Pavlik, E. González-Romero, T. Ware, A. Manousos, A. Ventura, F. Mingrone, E. Griesmayer, M. A. Cortés-Giraldo, M. Mastromarco, C. Lederer, Mario Weigand, C. Domingo-Pardo, J. Andrzejewski, Srinivasan Ganesan, S. Altstadt, G. Vannini, N. Colonna, J. Marganiec, Massimo Barbagallo, L. Cosentino, D. Bosnar, M. Mirea, F. Bečvář, I. F. Gonçalves, A. Riego, Anton Wallner, E. Mendoza, Peter Schillebeeckx, S. Valenta, F. Calviño, V. Bécares, H. Leeb, I. Duran, K. Fraval, Carlos Guerrero, Fabio Belloni, V. Variale, Marco Calviani, J. Perkowski, P. Vaz, S. Heinitz, M. Kokkoris, D. Cano-Ott, Rene Reifarth, M. Krtička, Stefan Schmidt, G. Tagliente, M. Diakaki, F. Gunsing, Vittorio Boccone, Christoph Langer, J. M. Quesada, L. Tassan-Got, Roberto Versaci, Cristian Massimi, T. Martinez, M.B. Gómez-Hornillos, D. G. Jenkins, A. K. Saxena, Arnaud Ferrari, Alberto Mengoni, J. Billowes, P. M. Milazzo, A. Musumarra, C. Carrapiço, E. Chiaveri, P. F. Mastinu, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, C. Weiß, A. J. M. Plompen, W. Mondalaers, G. Giubrone, M. J. Vermeulen, Jeri Kroll, R. Sarmento, C. Paradela, L. Audouin, T. J. Wright, Petar Žugec, R. Vlastou, E. Berthoumieux, Roberto Losito, Rugard Dressler, A. Tsinganis, L.S. Leong, Vasilis Vlachoudis, F. Cerutti, Javier Praena, S. Lo Meo, P. Gurusamy, F. Käppeler, J. L. Tain, Niko Kivel, C. Rubbia, 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, n_TOF, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Žugec, P, Colonna, N., Bosnar, D., Ventura, A., Mengoni, A., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., 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., Cosentino, L., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., 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., Käppeler, F., Karadimos, D., Kivel, N., 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., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J., Rauscher, T., Reifarth, R., Riego, 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., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.

Subjects
Nuclear and High Energy Physics, 12C(n, p)12B reaction, integral measurement, n_TOF, Reaction, FOS: Physical sciences, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Time of flight technique, 7. Clean energy, 01 natural sciences, Nuclear physics, Cross section (physics), Neutron flux, 0103 physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Cross section, 010308 nuclear & particles physics, Time of flight, 13. Climate action, Production (computer science), Beam (structure)
Abstract

The integral measurement of the $^{12}$C(n,p)$^{12}$B reaction was performed at the neutron time of flight facility n_TOF at CERN. The total number of $^{12}$B nuclei produced per neutron pulse of the n_TOF beam was determined using the activation technique in combination with a time of flight technique. The cross section is integrated over the n_TOF neutron energy spectrum from reaction threshold at 13.6 MeV to 10 GeV. Having been measured up to 1 GeV on basis of the $^{235}$U(n,f) reaction, the neutron energy spectrum above 200 MeV has been reevaluated due to the recent extension of the cross section reference for this particular reaction, which is otherwise considered a standard up to 200 MeV. The results from the dedicated GEANT4 simulations have been used to evaluate the neutron flux from 1 GeV up to 10 GeV. The experimental results related to the $^{12}$C(n,p)$^{12}$B reaction are compared with the evaluated cross sections from major libraries and with the predictions of different GEANT4 models, which mostly underestimate the $^{12}$B production. On the contrary, a good reproduction of the integral cross section derived from measurements is obtained with TALYS-1.6 calculations, with optimized parameters., 14 pages, 11 figures, 3 tables

Published
2016

11. Measurement of the 240Pu(n,f) cross-section at the CERN n TOF facility: First results from experimental area II (EAR-2)

Author

J. Marganiec, A. Kimura, E. Jericha, P. F. Mastinu, S. Montesano, Pedro G. Ferreira, J. A. Ryan, M. Mastromarco, Francesca Matteucci, Mario Barbagallo, S. V. Suryanarayana, D. Schumann, F. Mingrone, J. Andrzejewski, A. Pavlik, C. Domingo-Pardo, Carlo Rubbia, M. Kokkoris, A. Tsinganis, Anton Wallner, Variale, F. Calviño, Nicola Colonna, H. Leeb, J. Balibrea, T. Wright, M. Krtička, J. Perkowski, D. G. Jenkins, G. Tagliente, M. B. Gómez-Hornillos, C. Lederer, T. Martinez, Ketlerov, N. Patronis, F. Gunsing, A. K. Saxena, M. Licata, Bécares, E. Mendoza, Petar Žugec, Cristian Massimi, M. A. Cortés-Giraldo, F. Bečvář, O. Aberle, P. M. Milazzo, A. Stamatopoulos, A. Goverdovski, P. Schillebeeckx, I. Duran, Hideo Harada, S. Heinitz, L. Cosentino, J. Billowes, Alfredo Ferrari, F. R. Palomo-Pinto, S. Warren, C. Paradela, M. Bacak, S. Valenta, E. Dupont, R. Dressler, P. Kavrigin, Marco Calviani, A. Musumarra, Ioana Gheorghe, A. G. Smith, Ralf Nolte, M. S. Robles, T. Glodariu, B. Fernández-Domínguez, F. Käppeler, Furman, E. Griesmayer, Tanja Heftrich, L. A. Damone, C. Weiss, S. Schmidt, R. Vlastou, A. J. M. Plompen, M. Diakaki, A. Riego-Perez, Damir Bosnar, Y. Kadi, N. Kivel, E. González, R. Losito, E. Berthoumieux, Rene Reifarth, J. M. Quesada, L. Tassan-Got, Tatsuya Katabuchi, D. Macina, Carlos Guerrero, S. Barros, P. Vaz, L. Audouin, Alberto Ventura, E. Chiaveri, D. Cano-Ott, Khryachkov, A. Hernández-Prieto, J. I. Porras, M. Mirea, P. V. Sedyshev, Kathrin Göbel, Jan Heyse, J. L. Tain, Vlachoudis, P. Finocchiaro, Alberto Mengoni, G. Vannini, M. Caamaño, M. Weigand, Javier Praena, S. Lo Meo, F. Belloni, G. Cortes, R. J. W. Frost, F. Cerutti, J. Lerendegui-Marco, I. F. Gonçalves, K. Deo, Boccone, A. R. García, M. Brugger, C. Beinrucker, E. Leal-Cidoncha, Ariel Tarifeño-Saldivia, Thomas Rauscher, M. Sabaté-Gilarte, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), n_TOF, 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), Stamatopoulos, A., Tsinganis, A., Colonna, N., Vlastou, R., Kokkoris, M., Schillebeeckx, P., Plompen, A., Heyse, J., Ugec, P., Barbagallo, M., Calviani, M., Berthoumieux, E., Chiaveri, E., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Cano-Ott, D., Cerutti, F., Cortés, G., Cortés-Giraldo, M.A., 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., Göbel, K., Gómez-Hornillos, M.B., García, A.R., Gheorghe, I., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Licata, M., Meo, S. Lo, Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J.I., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wright, T., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, and Universidad de Sevilla. Departamento de Ingeniería Electrónica

Subjects
Nuclear fuel cycle, Fission, nTOF, QC1-999, Nuclear Theory, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Physics and Astronomy (all), Neutron flux, 0103 physical sciences, CERN, Fusió nuclear, ddc:530, Nuclear Physics - Experiment, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, MicroMegas detector, Actinide, 13. Climate action, Nuclear fission, Nuclear fusion
Abstract

The accurate knowledge of the neutron-induced fission cross-sections of actinides and other isotopes involved in the nuclear fuel cycle is essential for the design of advanced nuclear systems, such as Generation-IV nuclear reactors. Such experimental data can also provide the necessary feedback for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of nuclear fission models. In the present work, the 240Pu(n,f) cross-section was measured at CERN’s n TOF facility relative to the well-known 235U(n,f) cross section, over a wide range of neutron energies, from meV to almost MeV, using the time-of-flight technique and a set-up based on Micromegas detectors. This measurement was the first experiment to be performed at n TOF’s new experimental area (EAR-2), which offers a significantly higher neutron flux compared to the already existing experimental area (EAR-1). Preliminary results as well as the experimental procedure, including a description of the facility and the data handling and analysis, are presented., Support of the European Commission under the ANDES, ERINDA and CHANDA projects (7th Framework Programme).

Published
2016

12. Neutron induced fission cross-section of 240Pu(n,f): first results from n_TOF (CERN) Experimental Area II

Author

A. Tsinganis, A. Stamatopoulos, N. Colonna, R. Vlastou, P. Schillebeeckx, A. Plompen, J. Heyse, M. Kokkoris, M. Barbagallo, E. Berthoumieux, M. Calviani, E. Chiaveri, and And the N_TOF Collaboration

Subjects
Nuclear physics, Materials science, Curium, chemistry, Neutron flux, Fission, Neptunium, chemistry.chemical_element, Neutron, Context (language use), Americium, Plutonium
Abstract

The accurate knowledge of neutron cross-sections of a variety of plutonium isotopes and other minor actinides, such as neptunium, americium and curium, is crucial for feasibility and performance studies of advanced nuclear systems (Generation-IV reactors, Accelerator Driven Systems). In this context, the 240Pu(n,f) cross-section was measured with the time-of-flight technique at the CERN n_TOF facility at incident neutron energies ranging from thermal to several MeV. The present measurement is the first to have been performed at n_TOF's newly commissioned Experimental Area II (EAR-2), which is located at the end of an 18m neutron beam-line and features a neutron fluence that is 25-30 times higher with respect to the existing 185m flight-path (EAR-1), as well as stronger suppression of sample-induced backgrounds, due to the shorter times-of-flight involved. Preliminary results are presented.

Published
2019

13. A review of the fission programme at the CERN n_TOF facility

Author

A. Tsinganis and For the N_TOF Collaboration

Subjects
Nuclear technology, Neutron capture, Large Hadron Collider, Fission, Neutron flux, Nuclear engineering, Nuclear astrophysics, Radioactive waste, Environmental science, Actinide
Abstract

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

Published
2019

14. Characterization of the neutron flux distribution at the Athens Tandem Accelerator NCSR 'Demokritos'

Author

V. Loizou, M. Diakaki, M. Lambrou, G. Provatas, C.A. Kalfas, E. Mara, Aikaterini Kotrotsou, A. Tsinganis, M. Kokkoris, R. Vlastou, A. Lagoyannis, V. Paneta, and Ch Constantinou

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Neutron radiation, Particle detector, Nuclear physics, Radiation flux, Neutron flux, Neutron cross section, Physics::Accelerator Physics, Neutron detection, Neutron, Nuclear Experiment, Instrumentation, Neutron activation
Abstract

Quasi-monoenergetic neutron beams, in the energy range 7–11.5 MeV, produced via the 2H(d,n) reaction, have been used at the 5.5 MV tandem T11/25 Accelerator Laboratory of NCSR “Demokritos”. The flux variation of the neutron beam is monitored with a BF3 detector, while the absolute flux is obtained with respect to reference reactions. An investigation of the energy dependence of the neutron fluence has been carried out using two independent techniques: by a liquid scintillator BC501A detector and deconvolution of its recoil energy spectra performed by means of the DIFBAS code, as well as via the multiple foil activation technique in combination with the SULSA unfolding code. The neutron facility has also been characterized by means of Monte Carlo simulations with MCNP5.

Published
2011

15. 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

16. The CERN n_TOF Facility: Neutron Beams Performances for Cross Section Measurements

Author

F. Mingrone, J. Andrzejewski, C. Langer, N. Kivel, V. Bécares, C. Lederer, A. R. García, P. Gurusamy, G. Tagliente, M. Brugger, Rene Reifarth, E. Jericha, Stefan Schmidt, I. F. Gonçalves, M. Mastromarco, Vittorio Boccone, J. M. Quesada, Dorothea Schumann, L. Tassan-Got, J. L. Tain, S. Valenta, A. Mallick, G. Vannini, G. Cortes, T. J. Wright, D. Tarrío, Marco Calviani, Fabio Belloni, C. Carrapiço, Anton Wallner, C. Paradela, M. Krtička, L. Audouin, A. Hernández-Prieto, S. Altstadt, A. K. Saxena, Arnaud Ferrari, G. Giubrone, T. Martinez, A. Riego, Alberto Mengoni, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, V. Variale, W. Mondalaers, Petar Žugec, F. Cerutti, A. Manousos, Srinivasan Ganesan, F. Bečvář, F. Gunsing, D. Karadimos, J. Marganiec, Cristian Massimi, M. Meaze, M. J. Vermeulen, P. F. Mastinu, Mario Barbagallo, R. Versaci, E. Mendoza, E. González-Romero, M. B. Gómez-Hornillos, M. Kokkoris, Peter Schillebeeckx, N. Dzysiuk, J. Billowes, C. Weiss, R. Vlastou, M. P. W. Chin, Roberto Losito, D. G. Jenkins, Rugard Dressler, Damir Bosnar, Y. Kadi, Javier Praena, M. S. Robles, F. Roman, E. Berthoumieux, A. Tsinganis, F. Käppeler, P. M. Milazzo, Nicola Colonna, D. Cano-Ott, L.S. Leong, I. Duran, Vasilis Vlachoudis, M. Diakaki, M. A. Cortés-Giraldo, Mario Weigand, A. Ventura, K. Fraval, M. Mirea, F. Calviño, H. Leeb, J. Perkowski, P. E. Koehler, T. Ware, E. Griesmayer, Carlos Guerrero, A. J. M. Plompen, P. Vaz, Jeri Kroll, A. Pavlik, R. Sarmento, C. Domingo-Pardo, M. Sabaté-Gilarte, E. Chiaveri, C. Rubbia, C. Lampoudis, E. Chiaveri, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Becare, F. Becvar, F. Belloni, E. Berthoumieux, J. Billowe, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. Calvino, D. Cano-Ott, C. Carrapico, F. Cerutti, M. Chin, N. Colonna, G. Corte, M. A. Cortes-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, N. Dzysiuk, C. Eleftheriadi, A. Ferrari, K. Fraval, S. Ganesan, A. R. Garcia, G. Giubrone, M. B. Gomez-Hornillo, I. F. Goncalve, E. Gonzalez-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, P. Gurusamy, A. Hernandez-Prieto, D. G. Jenkin, E. Jericha, Y. Kadi, F. Kaeppeler, D. Karadimo, N. Kivel, P. Koehler, M. Kokkori, M. Krticka, J. Kroll, C. Lampoudi, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L. S. Leong, R. Losito, A. Mallick, A. Manouso, J. Marganiec, T. Martinez, C. Massimi, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondalaer, C. Paradela, A. Pavlik, J. Perkowski, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego, M. S. Roble, F. Roman, C. Rubbia, M. Sabate-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J. L. Tain, D. Tarrio, L. Tassan-Got, A. Tsingani, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, V. Vlachoudi, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Wei, T. Wright, P. Zugec, 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, Ventura, A., and Mengoni, A.

Subjects
Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Nuclear and High Energy Physics, Large Hadron Collider, Cross section, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, TOF, CERN - n_TOF, n_TOF, CERN, cross section measurements, Nuclear data, Beam, Neutron, Neutron radiation, Nuclear physics, Cross section (physics), Neutron flux, High activity, Nuclear Experiment, Beam (structure)
Abstract

This paper presents the characteristics of the existing CERN n_TOF neutron beam facility (n_TOF-EAR1 with a flight path of 185 meters) and the future one (n_TOF EAR-2 with a flight path of 19 meters), which will operate in parallel from Summer 2014. The new neutron beam will provide a 25 times higher neutron flux delivered in 10 times shorter neutron pulses, thus offering more powerful capabilities for measuring small mass, low cross section and/or high activity samples., JRC.D.4-Standards for Nuclear Safety, Security and Safeguards

Published
2014

17. High-accuracy determination of the neutron flux at n TOF

Author

G. Vannini, A. R. García, M. Brugger, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, M. B. Gómez-Hornillos, Christoph Langer, D. Karadimos, M. P. W. Chin, E. González-Romero, Rene Reifarth, F. Cerutti, Petar Žugec, F. Roman, Stefan Schmidt, W. Mondalaers, S. Andriamonje, Kathrin Göbel, J. M. Quesada, R. Versaci, L. Tassan-Got, G. Cortes, E. Jericha, A. Manousos, D. Tarrío, Srinivasan Ganesan, M. Kokkoris, P. F. Mastinu, C. Paradela, Patrick Steinegger, S. Valenta, Marco Calviani, G. Giubrone, M. Meaze, E. Chiaveri, D. Cano-Ott, Dorothea Schumann, Carlos Guerrero, J. Marganiec, T. Martinez, E. Mendoza, E. Berthoumieux, Roberto Losito, M. Mastromarco, M. Mirea, D. G. Jenkins, Javier Praena, A. Hernández-Prieto, L. Audouin, V. Bécares, C. Lampoudis, A. Pavlik, C. Domingo-Pardo, Mario Barbagallo, C. Carrapiço, Anton Wallner, G. Tagliente, A. J. M. Plompen, A. K. Saxena, M. Sabaté-Gilarte, Rugard Dressler, T. Ware, F. Mingrone, J. Andrzejewski, Alberto Mengoni, T. Papaevangelou, J. Billowes, Carlo Rubbia, M. A. Cortés-Giraldo, A. Tsinganis, V. Vlachoudis, J. L. Tain, V. Boccone, R. Vlastou, Nicola Colonna, L.S. Leong, V. Variale, Yacine Kadi, T. J. Wright, Damir Bosnar, P. Vaz, H. Leeb, P. M. Milazzo, J. Perkowski, Alberto Ventura, E. Griesmayer, Alfredo Ferrari, F. Gunsing, M. Krtička, F. Calviño, Jeri Kroll, R. Sarmento, Cristian Massimi, S. Altstadt, M. Diakaki, F. Bečvář, Peter Schillebeeckx, N. Dzysiuk, M. J. Vermeulen, Mario Weigand, P. E. Koehler, I. Duran, C. Weiß, F. Käppeler, K. Fraval, N. Kivel, P. Gurusamy, C. Lederer, A. Riego, I. F. Gonçalves, Fabio Belloni, M. Barbagallo, C. Guerrero, A. Tsingani, D. Tarrio, S. Altstadt, S. Andriamonje, J. Andrzejewski, L. Audouin, V. Becare, F. Becvar, F. Belloni, E. Berthoumieux, J. Billowe, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. Calvino, D. Cano-Ott, C. Carrapico, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Corte, M. A. Cortes-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, N. Dzysiuk, C. Eleftheriadi, A. Ferrari, K. Fraval, S. Ganesan, A. R. Garcia, G. Giubrone, K. Gobel, M. B. Gomez-Hornillo, I. F. Goncalve, E. Gonzalez-Romero, E. Griesmayer, F. Gunsing, P. Gurusamy, A. Hernandez-Prieto, D. G. Jenkin, E. Jericha, Y. Kadi, F. Kappeler, D. Karadimo, N. Kivel, P. Koehler, M. Kokkori, M. Krticka, J. Kroll, C. Lampoudi, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L. S. Leong, R. Losito, A. Manouso, J. Marganiec, T. Martinez, C. Massimi, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondalaer, T. Papaevangelou, C. Paradela, A. Pavlik, J. Perkowski, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego, F. Roman, C. Rubbia, M. Sabate-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Steinegger, G. Tagliente, J. L. Tain, L. Tassan-Got, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, V. Vlachoudi, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Wei, T. Wright, P. Zugec, 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, 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, TOF, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Fission, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Flux, BEAM, neutron flux, n_TOF, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Cross section (physics), Neutron flux, 0103 physical sciences, CERN, Nuclear fusion, High pressure physics, Spallation, FACILITY, Experimental physics, 010306 general physics, Nuclear Experiment, Physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, SCIENCE, Neutron radiation, Ntof, 13. Climate action, STANDARDS
Abstract

The neutron flux of the n TOF facility at CERN was measured, after installation of the new spallation target, with four different systems based on three neutron-converting reactions, which represent accepted cross sections standards in different energy regions. A careful comparison and combination of the different measurements allowed us to reach an unprecedented accuracy on the energy dependence of the neutron flux in the very wide range (thermal to 1 GeV) that characterizes the n TOF neutron beam. This is a pre-requisite for the high accuracy of cross section measurements at n TOF. An unexpected anomaly in the neutron-induced fission cross section of 235U is observed in the energy region between 10 and 30 keV, hinting at a possible overestimation of this important cross section, well above currently assigned uncertainties. © Società Italiana di Fisica / Springer-Verlag 2013.

Published
2013
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18. Isomeric cross section of the 197Au(n,2n) reaction.

Author

Tsinganis, A., Diakaki, M., Kokkoris, M., Lagoyannis, A., Mara, E., Papadopoulos, C. T., and Vlastou, R.

Subjects
*NUCLEAR reactions, *NEUTRONS, *NUCLEAR activation analysis, *MONTE Carlo method, *DEUTERIUM, *NEUTRON flux
Abstract

In the present work, the 197Au(n,2n) reaction cross section is experimentally determined relative to the 27Al(n,α)24Na reaction at incident neutron energies of 9.0-10.5 MeV by means of the activation technique. The quasimonoenergetic fast neutron beam was produced via the 2H(d,n)3He reaction at the 5.5-MV Tandem Van de Graaff accelerator at the National Centre of Scientific Research (NCSR) "Demokritos" and was studied to determine the contribution of background "parasitic" neutrons using the multiple foil activation technique and the SULSA unfolding code. The cross sections for the population of the second isomeric state (12-) of 196Au and the sum of the ground (2-) and first isomeric state (5-) population cross sections were independently determined. Auxiliary Monte Carlo simulations were performed with the MCNP code. Theoretical calculations of the above cross sections in the 8-25 MeV region were carried out with the use of the STAPRE-F, EMPIRE, and TALYS codes, which were also compared in their implementation of the generalized superfluid model. The theoretical results are compared with previous work in the same mass region, and the strong dependence on the level scheme of the nuclei involved was revealed. [ABSTRACT FROM AUTHOR]

Published
2011
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19. 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

20. 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.

21. 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.

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

Author

Stamatopoulos, A., Diakaki, M., Tsinganis, A., Colonna, N., Gunsing, F., Tassan-Got, L., Kokkoris, M., Kalamara, A., Žugec, P., Patronis, N., Sabate-Gilarte, M., and Vlastou, R.

Subjects
*NEUTRON temperature, *TIME-of-flight spectroscopy, *NEUTRON flux, *CHEMICAL kinetics, *NEUTRON counters
Abstract

Abstract In counting experiments associated with pulsed sources, a high data collection rate can lead to considerably large counting losses, especially in the case of spallation Time-of-Flight facilities equipped with medium and short flight paths where the research interest is focused on higher neutron energies where counting losses can be quite large due to the higher neutron flux, the more compressed time frame compared to the one on lower energies and the higher cross-section depending on the reaction. Examples of such measurements are the neutron induced fission experiments at the new experimental area EAR-2 at the n_TOF facility at CERN. Although analytical expressions to account for this inefficiency exist in literature, the introduced corrections are not always sufficient to retrieve the true reaction rate, therefore a different approach is mandatory. This work explores the possibility to quantify the counting losses using detector emulation devices and exponential fits in waiting time distributions. The methodology is benchmarked in the test case of the standard 238U(n,f) cross-section with reference to 235U(n,f) for bandwidths up to 1.9 MHz and counting losses that exceed 60%. [ABSTRACT FROM AUTHOR]

Published
2019
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23. The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance.

Author

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., and Belloni, F.

Subjects
*NEUTRON beams, *TIME-of-flight mass spectrometry, *ASTROPHYSICS, *MEDICAL physics, *NEUTRON flux, *NEUTRON collimators
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. [ABSTRACT FROM AUTHOR]

Published
2015
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24. Characterization of the neutron flux distribution at the Athens Tandem Accelerator NCSR “Demokritos”

Author

Vlastou, R., Kokkoris, M., Diakaki, M., Constantinou, Ch., Kalfas, C.A., Kotrotsou, A., Lagoyannis, A., Lambrou, M., Loizou, V., Mara, E., Paneta, V., Provatas, G., and Tsinganis, A.

Subjects
*NEUTRON flux, *PARTICLE accelerators, *NEUTRON beams, *ENERGY security, *LIQUID scintillators, *MONTE Carlo method
Abstract

Abstract: Quasi-monoenergetic neutron beams, in the energy range 7–11.5MeV, produced via the 2H(d,n) reaction, have been used at the 5.5MV tandem T11/25 Accelerator Laboratory of NCSR “Demokritos”. The flux variation of the neutron beam is monitored with a BF3 detector, while the absolute flux is obtained with respect to reference reactions. An investigation of the energy dependence of the neutron fluence has been carried out using two independent techniques: by a liquid scintillator BC501A detector and deconvolution of its recoil energy spectra performed by means of the DIFBAS code, as well as via the multiple foil activation technique in combination with the SULSA unfolding code. The neutron facility has also been characterized by means of Monte Carlo simulations with MCNP5. [Copyright &y& Elsevier]

Published
2011
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