Measurement of the 35Cl(n, p)35S cross-section at the CERN n$$\_$$TOF facility from subthermal energy to 120 keV
Year: 2026
Type: article
Abstract: The 35 Cl( n , p ) 35 S reaction plays a key role in neutron dosimetry for Boron Neutron Capture Therapy, in the synthesis of the isotope 36 S, whose astrophysical origin remains unresolved, and in the design of next-generation molten-salt reactors. Its relevance has motivated its inclusion in the High Priority Request List (HPRL) of NEA. The goal of this work is to determine the 35 Cl( n , p ) 35 S cross-section from thermal energy to 120 keV for the first time ever in a single measurement, thus reducing systematic uncertainties related to the normalization to the thermal value. This had been a subject of concern in previous evaluations of this reaction. We made use of the Time-of-Flight technique with microMEGAS detectors at Experimental Area 2 (EAR-2) of n_TOF facility at CERN. The 10 B $$(n, \alpha )$$ ( n , α ) 7 Li and 235 U( n , f ) reactions were used as references. Rutherford Back-scattering Spectrometry was performed at Centro Nacional de Aceleradores (CNA) in Sevilla, in order to accurately determine the masses of the irradiated samples. We obtained a thermal cross-section of $$0.470 \pm 0.009$$ 0.470 ± 0.009 barns. The 1/ v energy dependence of the cross-section is observed up to the first resonance at 0.398 keV, the resonances up to 120 keV are analyzed and resonance parameters extracted using SAMMY. Maxwellian Averaged Cross-Section (MACS) was calculated for $$k_B T$$ k B T from 1 to 100 keV, and lower values compared to estimations from ENDF were found, e.g., 1.07 ± 0.20 mb at $$k_BT=30$$ k B T = 30 keV. The thermal cross-section and first two resonances are in agreement with the latest evaluation in ENDF/B-VIII.1, while remarkably lower resonance strengths were found for high energy resonances.
Source: The European Physical Journal A
Authors: Marco Antonio Martinez-Cañadas, Pablo Torres-Sánchez, Javier Praena, Ignacio Porras, Marta Sabaté-Gilarte, Oliver Aberle, Victor Alcayne, Simone Amaducci, Józef Andrzejewski, Laurent Audouin, Vicente Bécares, Victor Babiano-Suarez, Michael Bacak, Massimo Barbagallo, František Bečvář, Giorgio Bellia, Eric Berthoumieux, Jon Billowes, Damir Bosnar, Adam Brown, Maurizio Busso, Manuel Caamaño, Luis Caballero, Francisco Calviño, Marco Calviani, Daniel Cano-Ott, Adria Casanovas, Francesco Cerutti, Yonghao Chen, Enrico Chiaveri, Nicola Colonna, Guillem Cortés, Miguel Cortés-Giraldo, Luigi Cosentino, Sergio Cristallo, Lucia-Anna Damone, Maria Diakaki, Mirco Dietz, César Domingo-Pardo, Rugard Dressler, Emmeric Dupont, Ignacio Durán, Zinovia Eleme, Beatriz Fernández-Domínguez, Alfredo Ferrari, Francisco Javier Ferrer, Paolo Finocchiaro, Valter Furman, Kathrin Göbel, Ruchi Garg, Aleksandra Gawlik-Ramikega, Benoit Geslot, Simone Gilardoni, Tudor Glodariu, Isabel Gonçalves, Enrique González-Romero, Carlos Guerrero, Frank Gunsing, Hideo Harada, Stephan Heinitz, Jan Heyse, David Jenkins, Erwin Jericha, Franz Käppeler, Yacine Kadi, Atsushi Kimura, Niko Kivel, Michael Kokkoris, Yury Kopatch, Milan Krtička, Deniz Kurtulgil, Ion Ladarescu, Claudia Lederer-Woods, Helmut Leeb, Jorge Lerendegui-Marco, Sergio Lo Meo, Sarah-Jane Lonsdale, Daniela Macina, Alice Manna, Trinitario Martínez, Alessandro Masi, Cristian Massimi, Pierfrancesco Mastinu, Mario Mastromarco, Francesca Matteucci, Emilio-Andrea Maugeri, Annamaria Mazzone, Emilio Mendoza, Alberto Mengoni, Veatriki Michalopoulou, Paolo Maria Milazzo, Federica Mingrone, Agatino Musumarra, Alexandru Negret, Ralf Nolte, Francisco Ogállar, Andreea Oprea, Nikolas Patronis, Andreas Pavlik, Jarosław Perkowski, Luciano Persanti, José-Manuel Quesada, Désirée Radeck, Diego Ramos-Doval, Thomas Rauscher, René Reifarth, Dimitri Rochman, Carlo Rubbia, Alok Saxena, Peter Schillebeeckx, Dorothea Schumann, Gavin Smith, Nikolay Sosnin, Athanasios Stamatopoulos, Giuseppe Tagliente, José Tain, Zeynep Talip, Ariel Tarifeño-Saldivia, Laurent Tassan-Got, Andrea Tsinganis, Jiri Ulrich, Sebastian Urlass, Stanislav Valenta, Gianni Vannini, Vincenzo Variale, Pedro Vaz, Alberto Ventura, Vasilis Vlachoudis, Rosa Vlastou, Anton Wallner, PhilipJohn Woods, Tobias Wright, Petar Žugec
Institutions: Universidad de Granada, Universitat de València, Instituto de Física Corpuscular, European Organization for Nuclear Research, Universidad de Sevilla, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, University of Catania, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, University of Łódź, Université Paris-Sud, Centre National de la Recherche Scientifique, Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules, Institut de Physique Nucléaire d’Orsay, TU Wien, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Charles University, University of Manchester, University of Zagreb, University of York, University of Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Universidade de Santiago de Compostela, Universitat Politècnica de Catalunya, Collurania Teramo Observatory, National Institute for Astrophysics, University of Bari Aldo Moro, National Technical University of Athens, University of Edinburgh, Paul Scherrer Institute, University of Ioannina, Centro Nacional de Aceleradores, Goethe University Frankfurt, CEA Cadarache, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Instituto Superior Técnico, Japan Atomic Energy Agency, European Commission, Joint Research Center, Karlsruhe Institute of Technology, National Agency for New Technologies, Energy and Sustainable Economic Development, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, University of Bologna, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, University of Trieste, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, National Research Council, Physikalisch-Technische Bundesanstalt, University of Vienna, University of Hertfordshire, University of Basel, Bhabha Atomic Research Centre, Helmholtz-Zentrum Dresden-Rossendorf, Australian National University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,990
Awards: G1092424111, G1105844351, G1175115578, G1196861792, G1307865877, G1953887145, G2262748287, G24120701, G2601397997, G294895050, G300979063, G3480869486, G3681454997, G4042783231, G412277574, G425668148, G4668258890, G4875165668, G507957923, G5080475149, G5635532810, G5923730219, G593054264, G6731524417, G7083312579, G771919193, G7805626310, G7863371703, G7889179438, EUROpean Laboratories for Accelerator Based Science, G8497050386
OpenAlex ID: W4415317503
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