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

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

doi:10.1051/epjconf/202023908002

All issues

Volume 239 (2020)

EPJ Web Conf., 239 (2020) 08002

Abstract

Open Access

Issue		EPJ Web Conf. Volume 239, 2020 ND 2019: International Conference on Nuclear Data for Science and Technology


Article Number		08002
Number of page(s)		5
Section		Cross Section and Decay Standards
DOI		https://doi.org/10.1051/epjconf/202023908002
Published online		30 September 2020

EPJ Web of Conferences 239, 08002 (2020)
https://doi.org/10.1051/epjconf/202023908002

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

S. Amaducci¹⁵^,35, O. Aberle¹, J. Andrzejewski², L. Audouin³, M. Bacak⁴^,1^,5, J. Balibrea⁶, M. Barbagallo⁷, F. Bečvář⁸, E. Berthoumieux⁵, J. Billowes⁹, D. Bosnar¹⁰, A. Brown¹¹, M. Caamaño¹², F. Calviño¹³, M. Calviani¹, D Cano-Ott⁶, R. Cardella¹, A. Casanovas¹³, F. Cerutti¹, Y. H. Chen³, E. Chiaveri¹^,9^,14, N. Colonna⁷, G. Cortés¹³, M. A. Cortés-Girardo¹⁴, L. Cosentino¹⁵, L. A. Damone⁷^,16, M. Diakaki⁵, C Domingo-Pardo¹⁷, R. Dressler¹⁸, E. Dupont⁵, I. Durán¹², B. Fernández-Domínguez¹², A. Ferrari¹, P. Ferreira¹⁹, P. Finocchiaro¹⁵, V. Furman²⁰, K. Göbel²¹, A. R. García⁶, A. Gawlik², S. Gilardoni¹, T. Glodariu²², I. F. Gonçalves¹⁹, E. González-Romero⁶, E. Griesmayer⁴, C. Guerrero¹⁴, F. Gunsing⁵^,1, H. Harada²³, S. Heinitz¹⁸, J. Heyse²⁴, D. G. Jenkins¹¹, E. Jericha⁴, F. Käppeler²⁵, Y. Kadi¹, A. Kalamara²⁶, P. Kavrigin⁴, A. Kimura²³, N. Kivel¹⁸, I. Knapova⁸, M. Kokkoris²⁶, M. Krtička⁸, D. Kurtulgil²¹, E Leal-Cidoncha¹², C. Lederer²⁷, H. Leeb⁴, J Lerendegui-Marco¹⁴, S. Lo Meo²⁸^,29, S. J. Lonsdale²⁷, D. Macina¹, A. Manna²⁹^,30, J. Marganiec²^,31, T. Martínez⁶, A. Masi¹, C. Massimi²⁹^,30, P. Mastinu³², M. Mastromarco⁷, E. A. Maugeri¹⁸, A. Mazzone⁷^,33, E. Mendoza⁶, A. Mengoni²⁸, P. M. Milazzo³⁴, F. Mingrone¹, A. Musumarra¹⁵^,35, A. Negret²², R. Nolte³¹, A. Oprea²², N. Patronis³⁶, A. Pavlik³⁷, J. Perkowski², I. Porras³⁸, J. Praena³⁸, J. M. Quesada¹⁴, D. Radeck³¹, T. Rauscher³⁹^,40, R. Reifarth²¹, C. Rubbia¹, J. A. Ryan⁹, M. Sabaté-Gilarte¹^,14, A. Saxena⁴¹, P. Schillebeeckx²⁴, D. Schumann¹⁸, P. Sedyshev²⁰, A. G. Smith⁹, N. V. Sosnin⁹, A. Stamatopoulos²⁶, G. Tagliente⁷, J. L. Tain¹⁷, A. Tarifeño-Saldivia¹³, L Tassan-Got³, S. Valenta⁸, G. Vannini²⁹^,30, V. Variale⁷, P. Vaz¹⁹, A. Ventura²⁹, V. Vlachoudis¹, R. Vlastou²⁶, A. Wallner⁴³, S. Warren⁹, C. Weiss⁴, P. J. Woods²⁷, T. Wright⁹, P. Žugec¹⁰^,1 and the n_TOF Collaboration

¹ European Organization for Nuclear Research (CERN), Switzerland
² University of Lodz, Poland
³ Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
⁴ Technische Universität Wien, Austria
⁵ CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
⁶ Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
⁷ Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
⁸ Charles University, Prague, Czech Republic
⁹ University of Manchester, United Kingdom
¹⁰ Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
¹¹ University of York, United Kingdom
¹² University of Santiago de Compostela, Spain
¹³ Universitat Politècnica de Catalunya, Spain
¹⁴ Universidad de Sevilla, Spain
¹⁵ INFN Laboratori Nazionali del Sud, Catania, Italy
¹⁶ Dipartimento di Fisica, Università degli Studi di Bari, Italy
¹⁷ Instituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
¹⁸ Paul Scherrer Institut (PSI), Villingen, Switzerland
¹⁹ Instituto Superior Técnico, Lisbon, Portugal
²⁰ Joint Institute for Nuclear Research (JINR), Dubna, Russia
²¹ Goethe University Frankfurt, Germany
²² Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
²³ Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
²⁴ European Commission, Joint Research Centre, Geel, Retieseweg 111, B-2440 Geel, Belgium
²⁵ Karlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
²⁶ National Technical University of Athens, Greece
²⁷ School of Physics and Astronomy, University of Edinburgh, United Kingdom
²⁸ Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
²⁹ Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
³⁰ Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
³¹ Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
³² Istituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
³³ Consiglio Nazionale delle Ricerche, Bari, Italy
³⁴ Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
³⁵ Dipartimento di Fisica e Astronomia, Università di Catania, Italy
³⁶ University of Ioannina, Greece
³⁷ University of Vienna, Faculty of Physics, Vienna, Austria
³⁸ University of Granada, Spain
³⁹ Department of Physics, University of Basel, Switzerland
⁴⁰ Centre for Astrophysics Research, University of Hertfordshire, United Kingdom
⁴¹ Bhabha Atomic Research Centre (BARC), India
⁴² Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Italy
⁴³ Australian National University, Canberra, Australia

Published online: 30 September 2020

Abstract

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

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