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

Author: C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec
Subjects: Physics, QC1-999
Published: 2023
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2. Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Author: C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec
Subjects: Physics, QC1-999
Abstract: 73Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system. Keywords: Nucleosynthesis, Neutron capture, s process, Germanium, n_TOF
Published: 2019
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3. ANTEGRADE LASER PAPILLOTOMY UNDER THE CONTROL OF VIDEO CHOLEDOCHOSCOPY IN PATIENTS WITH STENOSIS OF THE LARGE DUODENAL PAPILLA COMPLICATED WITH MECHANICAL JAUNDICE

Author: N. V. Levchenko, V. V. Khryachkov, R. R. Shavaliev, and D. P. Kislitsin
Subjects: stenosis of the large duodenal papilla, choledochoscopy, holmium laser, antegrade laser papillotomy, Medicine
Abstract: Purpose. To analyze the efficacy of the YAG:Ho laser in laparoscopic treatment of large duodenal papilla (LPA) stenosis complicated by mechanical jaundice.Patients and methods. The work is based on a prospective analysis of 31 patients undergoing treatment in the KhMAO-Ugra BU “NyaganDistrictHospital”. To perform antegrade laser papillotomy, a laser setup equipped with high-energy YAG: Ho laser, endovideosurgical complexes and a fibrocholedochoscope was used. During laparoscopic cholecystectomy, intraoperative choledochoscopy and antegrade laser papillotomy were performed.Results. Laser papillotomy was successfully performed in 31 (100%) patients with benign stenosis of LDP, among them in 15 patients (48.4%) the stenosis of LDP was combined with choledocholithiasis, which was detected intraoperatively in 9 (29.0%) cases. For optimal conduction of choledochoscopy, a guide device for a choledochoscope has been proposed (RF patent for utility model No. 149055 dated May 12, 2014).All surgical interventions, including lithotripsy, were performed laparoscopically, there was no indication for conversion.Conclusion. The received results show high efficiency of the applied technique, absence of complications and lethal outcomes. Antegrade laser papillotomy is effective even in those situations where endoscopic retrograde papillosphincterotomy is technically difficult or impracticable.
Published: 2018
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4. ALGORITHM FOR ESTIMATING THE EFFICIENCY OF NEURAL NETWORKS FOR n/γ-SEPARATION IN ORGANIC SCINTILLATORS

Author: P D'yachenko, V Khryachkov, P Prusachenko, and T Bobrovsky
Subjects: Physics::Instrumentation and Detectors
Abstract: Machine learning is one of the leading directions in digital signal processing. For example, in neutron spectrometry, artificial neural networks are actively used to suppress gamma background when analyzing signals from scintillation detectors. This article describes a method for determining the quality of n/γ-separation by an artificial neural network. The efficiency of the method is demonstrated by analyzing the signals obtained by measuring the prompt neutron spectrum of 252Cf spontaneous fission using a scintillation detector based on a stilbene crystal. The essence of the method is to determine the proportion of falsely identified events for each of the analyzed signal classes using a known reference method. An exemplary gamma-ray source was used to determine the false count of recoil protons. This approach made it possible to estimate the fraction of events from electrons identified as recoil protons and the fraction of recoil protons perceived as electrons, depending on the light yield of the scintillation signal. This, in turn, made it possible to reconstruct the true energy spectra for different types of particles, including for the region of low signal amplitudes, where the separation quality is usually poor. The reconstructing error was less than 8 % for the light yield region of less than 120 keVee.
Published: 2021

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

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

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

Author: M. Bacak, A. Musumarra, P. J. Woods, T. Glodariu, N. Patronis, A. Pavlik, Roberto Losito, Rene Reifarth, Stefan Schmidt, Cortés-Giraldo, J. M. Quesada, L. Tassan-Got, Tanja Heftrich, A. Riego-Perez, S.L. Meo, A. K. Saxena, Arnaud Ferrari, C. Domingo-Pardo, L. Audouin, G. Vannini, P. C. Rout, L. Cosentino, E. Dupont, J. Billowes, S. Montesano, Tatsuya Katabuchi, A. Stamatopoulos, S. Barros, A. Mengoni, K. Rajeev, M. Caamaño, Petar Žugec, A. Kimura, Rugard Dressler, Francesca Matteucci, D. G. Jenkins, Emilio Andrea Maugeri, A. Tsinganis, P. Kavrigin, Nicola Colonna, M. Kokkoris, Mario Barbagallo, A. Oprea, Vasilis Vlachoudis, I. Knapova, V. Ketlerov, G. Tagliente, G. Cortes, Ralf Nolte, P. Vaz, B. Fernández-Domínguez, F. Käppeler, E. Griesmayer, Kathrin Göbel, Alberto Ventura, A. Casanovas, A. Goverdovski, O. Aberle, L. A. Damone, D. Bosnar, Jan Heyse, J. I. Porras, A. R. García, U. Battino, M. Brugger, A. Tattersall, V. Furman, T. J. Wright, F. Cerutti, C. Beinrucker, R. Vlastou, I. Duran, E. Leal-Cidoncha, E. Berthoumieux, A. Gawlik, Thomas Rauscher, D. Cano-Ott, M. Diakaki, E. González-Romero, R. Cardella, Javier Praena, F. Bečvář, C. Wolf, E. Mendoza, Peter Schillebeeckx, V. Bécares, E. Jericha, Paolo Finocchiaro, F. Gunsing, Dorothea Schumann, J. A. Ryan, Cristian Massimi, Pedro G. Ferreira, Mario Weigand, M. Krtička, M. Mirea, F. Calviño, H. Leeb, J. Perkowski, T. Martinez, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. Lerendegui-Marco, S. Heinitz, V. Khryachkov, E. Chiaveri, P. F. Mastinu, P. M. Milazzo, Y. H. Chen, I. F. Gonçalves, M. Sabaté-Gilarte, S. Warren, V. Variale, M. Mastromarco, Anton Wallner, J. Balibrea, D. M. Castelluccio, Hideo Harada, D. Macina, Carlos Guerrero, Claudia Lederer-Woods, P. V. Sedyshev, F. Mingrone, J. Andrzejewski, C. Rubbia, J. L. Tain, Niko Kivel, C. Weiss, Y. Kadi, S. Valenta, Marco Calviani, A. G. Smith, M. Dietz, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), n_TOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
Subjects: Astrofísica, Astrophysics and Astronomy, Isotopes of germanium, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, chemistry.chemical_element, Germanium, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 7. Clean energy, Nuclear physics, Stellar nucleosynthesis, Isotopes, Nucleosynthesis, CERN, Neutron cross section, Neutron, Nuclear Physics - Experiment, n_TOF, Nuclear Experiment, Stellar activity, Physics, Física [Àrees temàtiques de la UPC], Neutron temperature, Neutron capture cross-section, Neutron capture, Activitat estelar, chemistry, Neutron time-of-flight, MACS, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], radiative neutron capture, Ge isotopes, n_TOF, stellar nucleosynthesis
Abstract: This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG No. 677497. We also acknowledge the support of the National Science Centre, Poland, under the grant UMO-2016/22/M/ST2/00183, the MSMT of the Czech Republic and the Croatian Science Foundation under the project IP-2018-01-8570., This manuscript summarizes the results of radiative neutron capture cross-section measurements on two stable germanium isotopes, Ge-70 and Ge-73. Experiments were performed at the n_TOF facility at CERN via the time-of-flight technique, over a wide neutron energy range, for all stable germanium isotopes (70,72,73,74, and 76). Results for Ge-70 [Phys. Rev. C 100, 045804 (2019)] and Ge-73 [Phys. Lett. B 790, 458 (2019)] are already published. In the field of nuclear structure, such measurements allow to study excited levels close to the neutron binding energy and to obtain information on nuclear properties. In stellar nucleosynthesis research, neutron induced reactions on germanium are of importance for nucleosynthesis in the weak component of the slow neutron capture processes., Austrian Science Fund (FWF) J3503, Adolf Messer Foundation (Germany), UK Science and Facilities Council ST/M006085/1, European Research Council (ERC), European Commission 677497, National Science Centre, Poland UMO-2016/22/M/ST2/00183, Ministry of Education, Youth & Sports - Czech Republic, Croatian Science Foundation IP-2018-01-8570
Published: 2021
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7. 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

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

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

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

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

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

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

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

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

12. Measurement of the Ge70(n,γ) cross section up to 300 keV at the CERN n_TOF facility

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

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

Author: S. Montesano, V. Khryachkov, A. Tsinganis, Alfredo Ferrari, F. R. Palomo-Pinto, Nicola Colonna, E. Dupont, A. Goverdovski, G. Tagliente, J. Heyse, A. Musumarra, Claudia Lederer-Woods, M. Mastromarco, F. Gunsing, Cristian Massimi, Pedro G. Ferreira, Mario Weigand, I. Duran, E. Mendoza, Anton Wallner, M. Bacak, P. V. Sedyshev, M. Mirea, J. Balibrea, V. Furman, F. Calviño, H. Leeb, Ioana Gheorghe, J. Perkowski, Tanja Heftrich, S. Heinitz, J. Billowes, M. Sabaté-Gilarte, A. Kimura, Francesca Matteucci, A. Riego-Perez, T. Glodariu, M. Krtička, A. Hernández-Prieto, S. Warren, V. Bécares, L. Cosentino, N. Patronis, R. Dressler, Roberto Losito, M. S. Robles, T. Martinez, E. Jericha, C. Weiss, D. Macina, R. Vlastou, V. Variale, Paolo Finocchiaro, A. Stamatopoulos, P. M. Milazzo, O. Aberle, J. A. Ryan, D. G. Jenkins, E. Berthoumieux, Mario Barbagallo, M. Diakaki, Alberto Mengoni, J. Marganiec, Carlos Guerrero, F. Bečvář, A. Saxena, S. V. Suryanarayana, D. Schumann, Damir Bosnar, Y. Kadi, E. González-Romero, P. F. Mastinu, A. Tattersall, P. Schillebeeckx, Hideo Harada, M. A. Cortés-Giraldo, P. Kavrigin, F. Mingrone, S. Valenta, J. Andrzejewski, Ralf Nolte, Marco Calviani, V. Vlachoudis, M. Kokkoris, Rene Reifarth, E. Griesmayer, A. G. Smith, Petar Žugec, C. Paradela, M. Dietz, Stefan Schmidt, L. A. Damone, L. Audouin, J. M. Quesada, L. Tassan-Got, K. Göbel, B. Fernández-Domínguez, F. Käppeler, T. Wright, Tatsuya Katabuchi, S. Barros, U. Battino, A. Pavlik, C. Domingo-Pardo, E. Chiaveri, D. Cano-Ott, J. I. Porras, I. Knapova, P. Vaz, Alberto Ventura, C. Rubbia, J. L. Tain, Niko Kivel, G. Cortes, J. Lerendegui-Marco, A. R. García, M. Brugger, I. F. Gonçalves, R. J. W. Frost, C. Beinrucker, E. Leal-Cidoncha, Javier Praena, S. Lo Meo, Fabio Belloni, G. Vannini, A. Gawlik, Thomas Rauscher, Ariel Tarifeño-Saldivia, M. Licata, K. Deo, M. Caamaño, V. Ketlerov, F. Cerutti, Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, J., Audouin, L., Becares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becvar, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Finocchiaro, P., Frost, R. J. W., Furman, V., Gobel, K., Garcia, A. R., Gheorghe, I., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krticka, M., Leal-Cidoncha, E., Leeb, H., Licata, M., Lo Meo, S., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., Zugec, P., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), n_TOF, Ministerio de Economía y Competitividad (España), Bécares, V., Bečvář, F., Caamaño, M., Calviño, F., Cortés, G., Cortés-Giraldo, M.A., Damone, L.A., Durán, I., Fernández-Domínguez, B., Frost, R.J.W., Göbel, K., García, A.R., Gonçalves, I.F., González-Romero, E., Hernández-Prieto, A., Jenkins, D.G., Käppeler, F., Krtička, M., Martínez, T., Milazzo, P.M., Palomo-Pinto, F.R., Porras, J.I., Quesada, J.M., Ryan, J.A., Sabaté-Gilarte, M., Smith, A.G., Suryanarayana, S.V., Tain, J.L., Tarifeño-Saldivia, A., Žugec, P., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Nucleosynthesis, Neutron capture, s process, Germanium, n_TOF, s proce, Nuclear reaction, Natural abundance, nucl-ex, 01 natural sciences, 7. Clean energy, Stellar nucleosynthesis, CERN, Astrophysics::Solar and Stellar Astrophysics, n_TOF, Nuclear Experiment (nucl-ex), Nuclear Experiment, Physics, Cross section, Germanium, lcsh:QC1-999, PRIRODNE ZNANOSTI. Fizika, Neutron capture, Nucleosynthesis, s process, Nucleosíntesi, Nuclear and High Energy Physics, nTOF, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Neutron, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Neutrons--Capture, Nuclear physics, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics, Nucleosynthesi, Energies::Energia nuclear [Àrees temàtiques de la UPC], Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Capture cross section, NATURAL SCIENCES. Physics, Stars, 13. Climate action, s-process, lcsh:Physics
Abstract: 73Ge(n, γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300keV, providing for the first time experimental data above 8keV. Results indicate that the stellar cross section at kT=30keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system., This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG Nr.677497.
Published: 2019
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14. Measurement and resonance analysis of the S33(n,α)Si30 cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV

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

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

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

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

Author: Tanja Heftrich, A. Mengoni, E. Leal-Cidoncha, Thomas Rauscher, A. Riego-Perez, E. González-Romero, L. Audouin, V. Bécares, V. Ketlerov, G. Vannini, A. G. Smith, N. Patronis, A. K. Saxena, I. Duran, M. Mirea, A. R. García, Arnaud Ferrari, D. M. Castelluccio, M. Brugger, Damir Bosnar, Y. Kadi, M. Caamaño, C. Beinrucker, S. Valenta, Rugard Dressler, Marco Calviani, C. Weiss, A. Kimura, E. Chiaveri, Rene Reifarth, Luigi Cosentino, C. Lederer, P. F. Mastinu, A. Tsinganis, F. Calviño, P. Kavrigin, Jan Heyse, Emilio Andrea Maugeri, Stefan Schmidt, S. Montesano, G. Tagliente, A. Oprea, D. G. Jenkins, H. Leeb, Nicola Colonna, B. Fernández-Domínguez, F. Käppeler, Vasilis Vlachoudis, J. M. Quesada, L. Tassan-Got, J. Perkowski, J. Marganiec, R. Cardella, O. Aberle, M. A. Cortés-Giraldo, A. Pavlik, M. Bacak, C. Domingo-Pardo, M. Sabaté-Gilarte, J. I. Porras, T. Glodariu, Roberto Losito, A. Stamatopoulos, M. Kokkoris, J. Andrzejewski, Ralf Nolte, G. Cortes, P. J. Woods, Mario Barbagallo, V. Khryachkov, P. M. Milazzo, K. Rajeev, E. Griesmayer, J. Billowes, S. Warren, L. A. Damone, Javier Praena, S. Lo Meo, Hideo Harada, V. Variale, Francesca Matteucci, M. Krtička, Arnd R. Junghans, D. Macina, P. Vaz, Carlos Guerrero, T. Martinez, Mario Weigand, A. Casanovas, D. Cano-Ott, M. Diakaki, M. Mastromarco, Y. H. Chen, S. J. Lonsdale, Ariel Tarifeño-Saldivia, P. C. Rout, K. Göbel, F. Cerutti, Anton Wallner, F. Mingrone, J. Balibrea, M. Dietz, F. Bečvář, F. Gunsing, C. Wolf, E. Mendoza, A. Goverdovski, S. Heinitz, Peter Schillebeeckx, Cristian Massimi, S. Barros, E. Jericha, Paolo Finocchiaro, Dorothea Schumann, P. Ferreira, Tatsuya Katabuchi, A. Ventura, J. A. Ryan, J. Lerendegui-Marco, P. V. Sedyshev, I. F. Gonçalves, E. Dupont, J. L. Tain, Niko Kivel, C. Rubbia, A. Gawlik, V. Furman, Klaus Eberhardt, T. J. Wright, Petar Žugec, R. Vlastou, E. Berthoumieux, and A. Musumarra
Subjects: Physics, Nuclear fuel, Fissile material, 010308 nuclear & particles physics, chemistry.chemical_element, Uranium, 01 natural sciences, 7. Clean energy, Spent nuclear fuel, Neutron temperature, Nuclear physics, Neutron capture, chemistry, 13. Climate action, 0103 physical sciences, Neutron, 010306 general physics, MOX fuel
Abstract: The spent fuel of current nuclear reactors contains fissile plutonium isotopes that can be combined with uranium to make mixed oxide (MOX) fuel. In this way the Pu from spent fuel is used in a new reactor cycle, contributing to the long-term sustainability of nuclear energy. However, an extensive use of MOX fuels, in particular in fast reactors, requires more accurate capture and fission cross sections for some Pu isotopes. In the case of Pu242 there are sizable discrepancies among the existing capture cross-section measurements included in the evaluations (all from the 1970s) resulting in an uncertainty as high as 35% in the fast energy region. Moreover, postirradiation experiments evaluated with JEFF-3.1 indicate an overestimation of 14% in the capture cross section in the fast neutron energy region. In this context, the Nuclear Energy Agency (NEA) requested an accuracy of 8% in this cross section in the energy region between 500 meV and 500 keV. This paper presents a new time-of-flight capture measurement on Pu242 carried out at n-TOF-EAR1 (CERN), focusing on the analysis and statistical properties of the resonance region, below 4 keV. The Pu242(n,γ) reaction on a sample containing 95(4) mg enriched to 99.959% was measured with an array of four C6D6 detectors and applying the total energy detection technique. The high neutron energy resolution of n-TOF-EAR1 and the good statistics accumulated have allowed us to extend the resonance analysis up to 4 keV, obtaining new individual and average resonance parameters from a capture cross section featuring a systematic uncertainty of 5%, fulfilling the request of the NEA.
Published: 2018

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

Author: A. Pavlik, C. Domingo-Pardo, P. Kavrigin, R. Cardella, G. Tagliente, E. Mendoza, Ralf Nolte, E. Griesmayer, V. Bécares, F. Bečvář, C. Wolf, L. A. Damone, A. Casanovas, E. Leal-Cidoncha, Hideo Harada, S. Heinitz, M. Sabaté-Gilarte, M. Diakaki, P. Vaz, C. Rubbia, G. Cortes, L. Cosentino, Alberto Ventura, A. Gawlik, Peter Schillebeeckx, P. C. Rout, F. Cerutti, I. Duran, Ignacio Porras, Thomas Rauscher, A. Oprea, C. Lederer, A. Kimura, N. Patronis, A. K. Saxena, S. Valenta, Arnaud Ferrari, A. García-Rios, Rene Reifarth, F. Gunsing, Marco Calviani, P. M. Milazzo, M. A. Cortés-Giraldo, M. Mastromarco, Stefan Schmidt, J. Billowes, S. Montesano, V. Khryachkov, A. G. Smith, J. L. Tain, K. Rajeev, D. Cano-Ott, J. Balibrea-Correa, M. Bacak, Philip Woods, Mario Barbagallo, Anton Wallner, Emilio Andrea Maugeri, J. M. Quesada, L. Tassan-Got, Javier Praena, S. Lo Meo, M. Kokkoris, Francesca Matteucci, E. Jericha, A. Stamatopoulos, M. Krtička, Paolo Finocchiaro, K. Gödel, G. Vannini, S. Warren, J. Lerendegui-Marco, Dorothea Schumann, J. A. Ryan, Niko Kivel, A. Goverdovski, C. Weiss, V. Variale, Cristian Massimi, T. Glodariu, F. Mingrone, Roberto Losito, Damir Bosnar, J. Andrzejewski, Y. Kadi, Rugard Dressler, I. F. Gonçalves, A. Tsinganis, A. Musumarra, M. Mirea, M. Camaño, T. Martinez, Nicola Colonna, F. Calviño, H. Leeb, Tanja Heftrich, J. Perkowski, Vasilis Vlachoudis, A. Riego-Perez, Tatsuya Katabuchi, A. Tarifeño-Saldivia, O. Aberle, S. Barros, M. Brugger, J. Marganiec, S. J. Lonsdale, D. G. Jenkins, C. Beinrucker, A. Mengoni, V. Ketlerov, E. Chiaveri, P. F. Mastinu, Y. H. Chen, R. Vlastou, E. Berthoumieux, B. Fernández-Domínguez, F. Käppeler, V. Furman, T. J. Wright, Petar Žugec, E. González, E. Dupont, D. M. Castelluccio, D. Macina, Carlos Guerrero, Jan Heyse, P. V. Sedyshev, Pedro G. Ferreira, Mario Weigand, L. Audouin, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mengoni, A., Lo Meo, S., Sabaté-Gilarte, M., Praena, J., Porras, I., Quesada, J.M., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Camaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Gödel, K., García-Rios, A., Gawlik, A., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P., Rubbia, C., Ryan, J.A., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., and Ž Ugec, P.
Subjects: Nuclear reaction, nTOF, Neutron therapy, QC1-999, chemistry.chemical_element, Neutron, 01 natural sciences, Resonance (particle physics), Nuclear physics, Cross section (physics), Physics and Astronomy (all), 0103 physical sciences, CERN, ddc:530, 010306 general physics, Boron, Physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Range (particle radiation), Large Hadron Collider, cross section, Reaccions nuclears, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Neutron capture, chemistry, Nuclear reactions
Abstract: The 33S(n,α)30Si cross section measurement, using 10B(n,α) as reference, at the n TOF Experimental Area 2 (EAR2) facility at CERN is presented. Data from 0.01 eV to 100 keV are provided and, for the first time, the cross section is measured in the range from 0.01 eV to 10 keV. These data may be used for a future evaluation of the cross section because present evaluations exhibit large discrepancies. The 33S(n,α)30Si reaction is of interest in medical physics because of its possible use as a cooperative target to boron in Neutron Capture Therapy (NCT)., This work has been partially supported by the projects of Junta de Andalucía (P07-FQM-02894, FQM-220, P11-FQM-8229), Ministerio de Ciencia y Tecnología (FPA2011-28770-C03-02), CEI-Biotic Granada (P-BS-64), Mineco (FPA2013-47327-C2- 1-R, FPA2014-53290-C2-2-P, FIS2015-69941-C2-1-P) and the funding agencies of the participating institutes.
Published: 2017
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18. 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

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

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

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

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

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

Author: M. Sabaté-Gilarte, Enrique Casarejos, F. Gunsing, A. Musumarra, Cristian Massimi, A. Pavlik, P. Ferreira, C. Domingo-Pardo, P. M. Milazzo, N. Kivel, M. Krtička, R. Nolte, G. Tagliente, M. A. Cortés-Giraldo, Ariel Tarifeño-Saldivia, S. J. Lonsdale, P. C. Rout, M. Caamaño, F. Cerutti, Alfredo Ferrari, R. Cardella, T. Martinez, Javier Praena, S. Lo Meo, K. Göbel, C. Lederer, G. Vannini, S. Warren, A. Kimura, Tatsuya Katabuchi, E. Leal-Cidoncha, Tanja Heftrich, F. Mingrone, J. Andrzejewski, Mario Weigand, V. Variale, J. Marganiec, O. Aberle, T. Wright, E. Chiaveri, D. Cano-Ott, D. Macina, J. L. Tain, Carlo Rubbia, E. González, V. Vlachoudis, S. Barros, A. Gawlik, M. Kokkoris, J. I. Porras, Thomas Rauscher, Rene Reifarth, D. M. Castelluccio, A. Riego-Perez, J. Lerendegui-Marco, Stefan Schmidt, Mario Barbagallo, P. F. Mastinu, V. Khryachkov, M. Mirea, D. Schumann, P. Vaz, L. Cosentino, J. M. Quesada, C. Le Naour, L. Tassan-Got, Alberto Ventura, I. F. Gonçalves, M. Bacak, D. G. Jenkins, F. Käppeler, E. Mendoza, V. Bécares, F. Calviño, H. Leeb, A. Oprea, G. Cortes, A. Casanovas, J. Perkowski, S. Montesano, Y. H. Chen, J. Heyse, A. R. García, M. B. Gómez-Hornillos, B. Fernández-Domínguez, S. Heinitz, N. Patronis, Carlos Guerrero, M. Brugger, I. Duran, S. Valenta, Marco Calviani, A. Stamatopoulos, C. Beinrucker, A. Saxena, E. Jericha, C. Wolf, A. G. Smith, Roberto Losito, T. Glodariu, Paolo Finocchiaro, K. Rajeev, Philip Woods, Alberto Mengoni, J. A. Ryan, P. Schillebeeckx, Francesca Matteucci, V. Ketlerov, C. Weiss, R. Vlastou, A. Goverdovski, R. Dressler, A. Tsinganis, Damir Bosnar, Y. Kadi, P. Kavrigin, P. V. Sedyshev, F. Bečvář, Nicola Colonna, Hideo Harada, E. Dupont, J. Billowes, E. Griesmayer, M. Mastromarco, L. A. Damone, M. S. Robles, Anton Wallner, E. A. Maugeri, J. Balibrea, L. Audouin, M. Diakaki, E. Berthoumieux, V. Furman, Petar Žugec, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Gobierno de España, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Chen, Y.H., Tassan-Got, L., Audouin, L., Le Naour, C., Durán, I., Casarejos, E., Aberle, O., Andrzejewski, J., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., Gómez-Hornillos, M.B., García, A.R., Gawlik, A., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, J.I., Praena, J., Quesada, J.M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rout, P.C., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., Ugec, P., and Lo Meo, S.
Subjects: nTOF, QC1-999, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Neutron, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), CERN, 0103 physical sciences, ddc:530, 010306 general physics, Neutrons, Physics, Flux, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Beam, Neutron radiation, Accelerators and Storage Rings, Parallel plate, Characterization (materials science), Beam (structure)
Abstract: The experimental area 2 (EAR-2) at CERNs neutron time-of-flight facility (n TOF), which is operational since 2014, is designed and built as a short-distance complement to the experimental area 1 (EAR-1). The Parallel Plate Avalanche Counter (PPAC) monitor experiment was performed to characterize the beam profile and the shape of the neutron flux at EAR-2. The prompt γ-flash which is used for calibrating the time-of-flight at EAR-1 is not seen by PPAC at EAR-2, shedding light on the physical origin of this γ-flash., The USC group contribution has been partly supported by Spanish grant FPA2013-46236-P.
Published: 2017
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22. 7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n-TOF facility at CERN

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

23. Nuclear data activities at the n_TOF facility at CERN

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

24. The 236U neutron capture cross-section measured at the n TOF CERN facility

Author: A. J. M. Plompen, Rene Reifarth, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, C. Lampoudis, M. P. W. Chin, C. Domingo-Pardo, M. Sabaté-Gilarte, M. B. Gómez-Hornillos, Tanja Heftrich, V. Ketlerov, Christoph Langer, F. Roman, A. Riego-Perez, M. S. Robles, G. Vannini, G. Tagliente, C. Paradela, Srinivasan Ganesan, R. Sarmento, F. Cerutti, A. R. García, P. Vaz, D. Cano-Ott, R. Vlastou, M. Mirea, L. Audouin, M. J. Vermeulen, M. Diakaki, Alberto Ventura, E. Berthoumieux, I. Duran, W. Mondelaers, G. Giubrone, C. Lederer, Mario Barbagallo, M. Brugger, M. Kokkoris, A. Pavlik, P. V. Sedyshev, D. G. Jenkins, A. Manousos, Jeri Kroll, A. Goverdovski, M. Licata, V. Variale, A. Tsinganis, M. Mastromarco, F. Käppeler, Roberto Versaci, Damir Bosnar, F. Mingrone, M. A. Cortés-Giraldo, Y. Kadi, J. Andrzejewski, K. Fraval, Petar Žugec, Nicola Colonna, J. Marganiec, E. Leal-Cidoncha, Anton Wallner, G. Cortes, Vasilis Vlachoudis, C. Carrapiço, C. Eleftheriadis, A. K. Saxena, C. Weiss, S. Valenta, D. Tarrío, J. L. Tain, L. S. Leong, Arnaud Ferrari, Javier Praena, T. Ware, Thomas Rauscher, Alberto Mengoni, Marco Calviani, E. Chiaveri, J. Billowes, P. F. Mastinu, E. Griesmayer, D. Karadimos, Roberto Losito, Jan Heyse, S. Heinitz, P. Koehler, M. Krtička, T. Martinez, Carlos Guerrero, V. Furman, T. J. Wright, Ariel Tarifeño-Saldivia, A. Hernández-Prieto, J. Lerendegui-Marco, I. F. Gonçalves, T. Katabuchi, Fabio Belloni, F. Calviño, H. Leeb, P. Gurusamy, J. Perkowski, E. González, Mario Weigand, C. Rubbia, F. Gunsing, Cristian Massimi, F. Bečvář, E. Mendoza, Peter Schillebeeckx, N. Dzysiuk, V. Bécares, V. Khryachkov, P. M. Milazzo, S. Altstadt, E. Jericha, Dorothea Schumann, J. A. Ryan, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, 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), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Mastromarco, M., Barbagallo, M., Vermeulen, M.J., Colonna, N., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Durán, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Koehler, P., Kokkoris, M., Kroll, J., Krtička, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Licata, M., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A.J.M., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Roman, F., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and Ž Ugec, P.
Subjects: Nuclear reaction, nTOF, QC1-999, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Physics and Astronomy (all), Cross section (physics), 0103 physical sciences, CERN, Neutron cross section, Nuclear Physics - Experiment, ddc:530, 010306 general physics, Absorption (electromagnetic radiation), Physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Isotope, Cross section, Reaccions nuclears, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Resonance, Calorimeter, 13. Climate action, Nuclear reactions
Abstract: International audience; The $^{236}$U isotope plays an important role in nuclear systems, both for future and currently operating ones. The actual knowledge of the capture reaction of this isotope is satisfactory in the thermal region, but it is considered insufficient for Fast Reactor and ADS applications. For this reason the $^{236} \text{U}(n, \gamma)$ reaction cross-section has been measured for the first time in the whole energy region from thermal energy up to 1 MeV at the n_TOF facility with two different detection systems: an array of C$_6$D$_6$ detectors, employing the total energy deposited method, and a 4$\pi$ total absorption calorimeter (TAC), made of 40 BaF$_2$ crystals. The two n_TOF data sets agree with each other within the statistical uncertainty in the Resolved Resonance Region up to 800 eV, while sizable differences (up to ≃ 20%) are found relative to the current evaluated data libraries. Moreover two new resonances have been found in the n_TOF data. In the Unresolved Resonance Region up to 200 keV, the n_TOF results show a reasonable agreement with previous measurements and evaluated data.
Published: 2016
Full Text: View/download PDF

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

Author: M. Krtička, T. Martinez, M. Mastromarco, M. Licata, Y. H. Chen, J. Marganiec, E. Chiaveri, P. F. Mastinu, I. Porras, F. Bečvář, E. Leal-Cidoncha, Anton Wallner, C. Wolf, P. Kavrigin, C. Rubbia, Rene Reifarth, Stefan Schmidt, E. Mendoza, G. Vannini, Ralf Nolte, A. Gawlik, N. Patronis, A. K. Saxena, Peter Schillebeeckx, A. S. Brown, P. C. Rout, F. Mingrone, C. Lederer, J. M. Quesada, Arnaud Ferrari, L. Tassan-Got, Thomas Rauscher, Javier Praena, S. Lo Meo, A. Goverdovski, G. Tagliente, F. R. Palomo-Pinto, D. M. Castelluccio, A. Kimura, Srinivasan Ganesan, J. Andrzejewski, E. Griesmayer, Alberto Mengoni, C. Paradela, D. Macina, Carlos Guerrero, M. Caamaño, S. Heinitz, J. Billowes, O. Aberle, V. Khryachkov, J. L. Tain, L. Audouin, P. M. Milazzo, M. S. Robles, Tatsuya Katabuchi, D. Cano-Ott, S. Montesano, A. R. García, V. Bécares, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Mario Barbagallo, Deniz Kurtulgil, P. V. Sedyshev, Emilio Andrea Maugeri, S. V. Suryanarayana, Niko Kivel, F. Cerutti, M. Kokkoris, L. Cosentino, S. Barros, I. Duran, M. Brugger, E. Jericha, G. Cortes, A. Musumarra, C. Beinrucker, Paolo Finocchiaro, D. Tarrío, K. Rajeev, Dorothea Schumann, J. A. Ryan, K. Deo, Simone Gilardoni, A. Hernández-Prieto, Francesca Matteucci, V. Ketlerov, E. González, R. J. W. Frost, A. Casanovas, M. Diakaki, R. Cardella, I. F. Gonçalves, Alexandru Negret, J. Balibrea-Correa, B. Fernández-Domínguez, F. Käppeler, C. Weiss, Tanja Heftrich, A. Oprea, P. Vaz, S. Warren, A. Riego-Perez, Kathrin Göbel, Damir Bosnar, Y. Kadi, L. A. Damone, Alberto Ventura, Jan Heyse, A. Stamatopoulos, S. Valenta, V. Variale, Marco Calviani, A. Pavlik, A. Kalamara, A. G. Smith, C. Domingo-Pardo, Philip Woods, Fabio Belloni, Hideo Harada, M. Sabaté-Gilarte, F. Gunsing, Cristian Massimi, A. Masi, D. G. Jenkins, M. Mirea, F. Calviño, H. Leeb, M. A. Cortés-Giraldo, J. Perkowski, Pedro G. Ferreira, Mario Weigand, R. Vlastou, D. Radeck, E. Berthoumieux, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, Rugard Dressler, V. Furman, T. J. Wright, A. Tsinganis, Nicola Colonna, Vasilis Vlachoudis, M. Bacak, T. Glodariu, Roberto Losito, E. Dupont, Ioana Gheorghe, J. Lerendegui, Mengoni, A., Lo Meo, S., Castelluccio, D. M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), n_TOF, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Gunsing, F., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés-Giraldo, M.A., Cortés, G., Cosentino, L., Damone, L.A., Deo, K., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R.J.W., Furman, V., Ganesan, S., García, A.R., Gawlik, A., Gheorghe, I., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Göbel, K., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui, J., Licata, M., Meo, S. Lo, Lonsdale, S.J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.A., Mazzone, A., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Negret, A., Oprea, A., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rout, P., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., and Ž Ugec, P.
Subjects: Engineering, Nuclear transmutation, QC1-999, Nuclear engineering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Physics and Astronomy (all), 0103 physical sciences, Física::Electromagnetisme [Àrees temàtiques de la UPC], ddc:530, Nuclear Physics - Experiment, Neutron, 010306 general physics, Neutrons, Energies::Energia nuclear [Àrees temàtiques de la UPC], Large Hadron Collider, 010308 nuclear & particles physics, business.industry, Physics, Nuclear data, Radioactive waste, Nuclear technology, Beamline, Criticality, business
Abstract: Neutron-induced reaction cross sections are important for a wide variety of research fields ranging from the study of nuclear level densities, nucleosynthesis to applications of nuclear technology like design, and criticality and safety assessment of existing and future nuclear reactors, radiation dosimetry, medical applications, nuclear waste transmutation, accelerator-driven systems and fuel cycle investigations. Simulations and calculations of nuclear technology applications largely rely on evaluated nuclear data libraries. The evaluations in these libraries are based both on experimental data and theoretical models. CERN’s neutron time-of-flight facility n TOF has produced a considerable amount of experimental data since it has become fully operational with the start of its scientific measurement programme in 2001. While for a long period a single measurement station (EAR1) located at 185 m from the neutron production target was available, the construction of a second beam line at 20 m (EAR2) in 2014 has substantially increased the measurement capabilities of the facility. An outline of the experimental nuclear data activities at n TOF will be presented.
Published: 2017

26. The cross section of the 16O(n,α)13C reaction in the MeV energy range

Author: G. Giorginis, V. Corcalciuc, V. Khryachkov, and M. Kievets
Subjects: Cross section (physics), Range (particle radiation), Spectrometer, law, Chemistry, Ionization, Nuclear data, Atomic physics, Signal, Cathode, law.invention, Anode
Abstract: A novel spectrometer was developed and used to measure the cross section for the 16 O(n,α) reaction at IRMM. The basic parts of the new instrument are an ionisation chamber, a gas oxygen target, and signal digitisation. It is shown that simultaneous digitisation of the anode and cathode signals allows an effective background suppression and the accurate determination of the number of reaction events and the number of atoms in the gas target. Cross section values for the 16 O(n,α) reaction measured in the energy range 3.95-9.0MeV are presented. None of the existing nuclear data libraries describes well the IRMM data in the entire energy range.
Published: 2007

27. Observation of truly cold fragmentation of a heavy nucleus

Author: A. A. Goverdovskii, Yu. B. Ostapenko, V. V. Ketlerov, V. Khryachkov, and V.F. Mitrofanov
Subjects: Physics, Physics and Astronomy (miscellaneous), Solid-state physics, Fission, Nuclear Theory, Thorium, chemistry.chemical_element, Kinetic energy, Nuclear physics, medicine.anatomical_structure, chemistry, Fragmentation (mass spectrometry), medicine, Neutron, Physics::Atomic Physics, Atomic physics, Nuclear Experiment, Quantum, Nucleus
Abstract: The results of a careful investigation of the mass-energy-charge correlations of the fragments produced by fission of thorium-232 by 5 MeV neutrons are presented. The phenomenon of truly cold fragmentation of a thorium nucleus into tellurium-134 and strontium-99 in the quantum ground states is observed. It is shown that the reaction energy is completely exhausted by the kinetic energy of the fragments in their mutual field.
Published: 1998

28. The anatomical-functional picture of the vessels in the ischaemic myocardium--a fluorescence investigation

Author: Borodin YuI, B A, Polyansky, Z T, Bikbulatov, and V V, Khryachkov
Subjects: Electrocardiography, Dogs, Cats, Myocardial Infarction, Animals, Humans, Fluorescein, Rabbits, Fluoresceins, Coronary Vessels
Published: 1982

29. 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

30. 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.

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

Author: I. Duran, Rugard Dressler, A. Mallick, M. Kokkoris, G. Vannini, S. Valenta, D. G. Jenkins, W. Mondelaers, Marco Calviani, A. Tsinganis, M. B. Gómez-Hornillos, Nicola Colonna, Christoph Langer, V. Variale, Vasilis Vlachoudis, M. Krtička, G. Giubrone, Jeri Kroll, M. A. Cortés-Giraldo, Javier Praena, T. Martinez, A. K. Saxena, A. Goverdovski, Srinivasan Ganesan, T. Ware, Arnaud Ferrari, J. Marganiec, G. Cortes, E. Griesmayer, D. Tarrío, J. Andrzejewski, E. Chiaveri, Damir Bosnar, Y. Kadi, P. F. Mastinu, J. Billowes, A. Hernández-Prieto, L. S. Leong, Mario Weigand, Mario Barbagallo, Petar Žugec, Tanja Heftrich, M. Sabaté-Gilarte, F. Cerutti, P. E. Koehler, A. Riego-Perez, G. Tagliente, C. Carrapiço, F. Gunsing, Roberto Losito, Rene Reifarth, M. J. Vermeulen, Kathrin Göbel, Stefan Schmidt, S. Altstadt, A. J. M. Plompen, Cristian Massimi, E. Jericha, K. Fraval, Vittorio Boccone, Jan Heyse, J. M. Quesada, L. Tassan-Got, C. Paradela, P. V. Sedyshev, L. Audouin, Dorothea Schumann, M. Mirea, F. Mingrone, C. Weiss, J. A. Ryan, C. Lederer, F. Calviño, H. Leeb, V. Bécares, J. Perkowski, Carlos Guerrero, Tatsuya Katabuchi, M. Mastromarco, P. M. Milazzo, J. Lerendegui-Marco, Anton Wallner, F. Bečvář, R. Sarmento, E. Mendoza, R. Vlastou, E. Berthoumieux, I. F. Gonçalves, Peter Schillebeeckx, Fabio Belloni, V. Furman, T. J. Wright, A. R. García, M. Brugger, E. Leal-Cidoncha, C. Eleftheriadis, Ariel Tarifeño-Saldivia, Thomas Rauscher, D. Karadimos, A. Mengoni, M. P. W. Chin, V. Ketlerov, C. Lampoudis, A. Pavlik, C. Domingo-Pardo, P. Vaz, Alberto Ventura, M. S. Robles, D. Cano-Ott, M. Diakaki, A. Manousos, V. Khryachkov, E. González, F. Käppeler, C. Rubbia, J. L. Tain, Niko Kivel, Mingrone, F., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Krtička, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A.J.M., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., Ž Ugec, P., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Subjects: Nuclear reaction, nTOF, QC1-999, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Cross section (physics), Physics and Astronomy (all), Nuclear reactors, Reactors nuclears, 0103 physical sciences, Thermal, CERN, ddc:530, Nuclear Physics - Experiment, 010306 general physics, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Range (particle radiation), Large Hadron Collider, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, Radiative capture, Nuclear energy, Energia nuclear, Energy (signal processing)
Abstract: The importance of improving the accuracy on the capture cross-section of 238U has been addressed by the Nuclear Energy Agency, since its uncertainty significantly affects the uncertainties of key design parameters for both fast and thermal nuclear reactors. Within the 7th framework programme ANDES of the European Commission three different measurements have been carried out with the aim of providing the 238U(n,γ) cross-section with an accuracy which varies from 1 to 5%, depending on the energy range. Hereby the final results of the measurement performed at the n-TOF CERN facility in a wide energy range from 1 eV to 700 keV will be presented. © The Authors, published by EDP Sciences, 2017.

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

Author: Casanovas-Hoste A, Domingo-Pardo C, Lerendegui-Marco J, Guerrero C, Tarifeño-Saldivia A, Krtička M, Pignatari M, Calviño F, Schumann D, Heinitz S, Dressler R, Köster U, Aberle O, Andrzejewski J, Audouin L, Bécares V, Bacak M, Balibrea-Correa J, Barbagallo M, Barros S, Bečvář F, Beinrucker C, Berthoumieux E, Billowes J, Bosnar D, Brugger M, Caamaño M, Calviani M, Cano-Ott D, Cardella R, Castelluccio DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Diakaki M, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik-Ramięga A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Gunsing F, Harada H, Heftrich T, Heyse J, Jenkins DG, Jericha E, Käppeler F, Kadi Y, Katabuchi T, Kavrigin P, Ketlerov V, Khryachkov V, Kimura A, Kivel N, Kokkoris M, Leal-Cidoncha E, Lederer-Woods C, Leeb H, Lo Meo S, Lonsdale SJ, Losito R, Macina D, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Romanets Y, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, Tassan-Got L, Tsinganis A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weigand M, Weiss C, Wolf C, Woods PJ, Wright T, and Žugec P
Abstract: Asymptotic giant branch stars are responsible for the production of most of the heavy isotopes beyond Sr observed in the solar system. Among them, isotopes shielded from the r-process contribution by their stable isobars are defined as s-only nuclei. For a long time the abundance of ^{204}Pb, the heaviest s-only isotope, has been a topic of debate because state-of-the-art stellar models appeared to systematically underestimate its solar abundance. Besides the impact of uncertainties from stellar models and galactic chemical evolution simulations, this discrepancy was further obscured by rather divergent theoretical estimates for the neutron capture cross section of its radioactive precursor in the neutron-capture flow, ^{204}Tl (t_{1/2}=3.78 yr), and by the lack of experimental data on this reaction. We present the first ever neutron capture measurement on ^{204}Tl, conducted at the CERN neutron time-of-flight facility n_TOF, employing a sample of only 9 mg of ^{204}Tl produced at the Institute Laue Langevin high flux reactor. By complementing our new results with semiempirical calculations we obtained, at the s-process temperatures of kT≈8 keV and kT≈30 keV, Maxwellian-averaged cross sections (MACS) of 580(168) mb and 260(90) mb, respectively. These figures are about 3% lower and 20% higher than the corresponding values widely used in astrophysical calculations, which were based only on theoretical calculations. By using the new ^{204}Tl MACS, the uncertainty arising from the ^{204}Tl(n,γ) cross section on the s-process abundance of ^{204}Pb has been reduced from ∼30% down to +8%/-6%, and the s-process calculations are in agreement with the latest solar system abundance of ^{204}Pb reported by K. Lodders in 2021.
Published: 2024
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33. 74 Ge( n , γ ) cross section below 70 keV measured at n_TOF CERN.

Author: Lederer-Woods C, Aberle O, Andrzejewski J, Audouin L, Bécares V, Bacak M, Balibrea J, Barbagallo M, Barros S, Battino U, 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 DM, Cerutti F, Chen YH, Chiaveri E, Colonna N, Cortés G, Cortés-Giraldo MA, Cosentino L, Damone LA, Diakaki M, Domingo-Pardo C, Dressler R, Dupont E, Durán I, Fernández-Domínguez B, Ferrari A, Ferreira P, Finocchiaro P, Furman V, Göbel K, García AR, Gawlik-Ramięga A, Glodariu T, Gonçalves IF, González-Romero E, Goverdovski A, Griesmayer E, Guerrero C, Gunsing F, Harada H, Heftrich T, Heinitz S, Heyse J, Jenkins DG, 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, Leeb H, Lerendegui-Marco J, Meo SL, Lonsdale SJ, Losito R, Macina D, Marganiec J, Martínez T, Massimi C, Mastinu P, Mastromarco M, Matteucci F, Maugeri EA, Mendoza E, Mengoni A, Milazzo PM, Mingrone F, Mirea M, Montesano S, Musumarra A, Nolte R, Oprea A, Patronis N, Pavlik A, Perkowski J, Porras I, Praena J, Quesada JM, Rajeev K, Rauscher T, Reifarth R, Riego-Perez A, Rout PC, Rubbia C, Ryan JA, Sabaté-Gilarte M, Saxena A, Schillebeeckx P, Schmidt S, Schumann D, Sedyshev P, Smith AG, Stamatopoulos A, Tagliente G, Tain JL, Tarifeño-Saldivia A, Tassan-Got L, Tsinganis A, Valenta S, Vannini G, Variale V, Vaz P, Ventura A, Vlachoudis V, Vlastou R, Wallner A, Warren S, Weigand M, Weiss C, Wolf C, Woods PJ, Wright T, and Žugec P
Abstract: Neutron capture reaction cross sections on 74 Ge are of importance to determine 74 Ge production during the astrophysical slow neutron capture process. We present new resonance data on 74 Ge( n , γ ) reactions below 70 keV neutron energy. We calculate Maxwellian averaged cross sections, combining our data below 70 keV with evaluated cross sections at higher neutron energies. Our stellar cross sections are in agreement with a previous activation measurement performed at Forschungszentrum Karlsruhe by Marganiec et al., once their data has been re-normalised to account for an update in the reference cross section used in that experiment., (© The Author(s) 2022.)
Published: 2022
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34. Neutron Capture on the s-Process Branching Point ^{171}Tm via Time-of-Flight and Activation.

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

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

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

3. ANTEGRADE LASER PAPILLOTOMY UNDER THE CONTROL OF VIDEO CHOLEDOCHOSCOPY IN PATIENTS WITH STENOSIS OF THE LARGE DUODENAL PAPILLA COMPLICATED WITH MECHANICAL JAUNDICE

4. ALGORITHM FOR ESTIMATING THE EFFICIENCY OF NEURAL NETWORKS FOR n/γ-SEPARATION IN ORGANIC SCINTILLATORS

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

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

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

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

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

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

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

12. Measurement of the Ge70(n,γ) cross section up to 300 keV at the CERN n_TOF facility

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

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

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

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

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

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

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

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

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

22. 7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n-TOF facility at CERN

23. Nuclear data activities at the n_TOF facility at CERN

24. The 236U neutron capture cross-section measured at the n TOF CERN facility

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

26. The cross section of the 16O(n,α)13C reaction in the MeV energy range

27. Observation of truly cold fragmentation of a heavy nucleus

28. The anatomical-functional picture of the vessels in the ischaemic myocardium--a fluorescence investigation

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

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

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

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

33. 74 Ge( n , γ ) cross section below 70 keV measured at n_TOF CERN.

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

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