Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility

The neutron-induced fission cross section of 236U was measured at the neutron Time-of-Flight (n-TOF) facility at CERN relative to the standard 235U(n,f) cross section for neutron energies ranging from above thermal to several MeV. The measurement, covering the full range simultaneously, was performe...

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Autores: Sarmento, Raul, Calviani, M., Praena Rodríguez, Javier, Colonna, Nicola, Belloni, F., Gonçalves, I. F., Wisshak, K., Capote, Roberto, Lozano Leyva, Manuel Luis, Quesada Molina, José Manuel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/57198
Acceso en línea:http://hdl.handle.net/11441/57198
Access Level:acceso abierto
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spelling Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facilitySarmento, RaulCalviani, M.Praena Rodríguez, JavierColonna, NicolaBelloni, F.Gonçalves, I. F.Wisshak, K.Capote, RobertoLozano Leyva, Manuel LuisQuesada Molina, José ManuelThe neutron-induced fission cross section of 236U was measured at the neutron Time-of-Flight (n-TOF) facility at CERN relative to the standard 235U(n,f) cross section for neutron energies ranging from above thermal to several MeV. The measurement, covering the full range simultaneously, was performed with a fast ionization chamber, taking advantage of the high resolution of the n-TOF spectrometer. The n-TOF results confirm that the first resonance at 5.45 eV is largely overestimated in some nuclear data libraries. The resonance triplet around 1.2 keV was measured with high resolution and resonance parameters were determined with good accuracy. Resonances at high energy have also been observed and characterized and different values for the cross section are provided for the region between 10 keV and the fission threshold. The present work indicates various shortcomings of the current nuclear data libraries in the subthreshold region and provides the basis for an accurate re-evaluation of the 236U(n,f) cross section, which is of great relevance for the development of emerging or innovative nuclear reactor technologies.Comisión Europea FIKW-CT-2000-00107American Physical SocietyFísica Atómica, Molecular y NuclearEuropean Commission (EC)2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/57198reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésPhysical Review C - Nuclear Physics, 84 (4), 044618-1-044618-10.FIKW-CT-2000-0010710.1103/PhysRevC.84.044618info:eu-repo/semantics/openAccessoai:idus.us.es:11441/571982026-06-17T12:51:07Z
dc.title.none.fl_str_mv Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
title Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
spellingShingle Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
Sarmento, Raul
title_short Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
title_full Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
title_fullStr Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
title_full_unstemmed Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
title_sort Measurement of the 236U(n,f) cross section from 170 meV to 2 MeV at the CERN n_TOF facility
dc.creator.none.fl_str_mv Sarmento, Raul
Calviani, M.
Praena Rodríguez, Javier
Colonna, Nicola
Belloni, F.
Gonçalves, I. F.
Wisshak, K.
Capote, Roberto
Lozano Leyva, Manuel Luis
Quesada Molina, José Manuel
author Sarmento, Raul
author_facet Sarmento, Raul
Calviani, M.
Praena Rodríguez, Javier
Colonna, Nicola
Belloni, F.
Gonçalves, I. F.
Wisshak, K.
Capote, Roberto
Lozano Leyva, Manuel Luis
Quesada Molina, José Manuel
author_role author
author2 Calviani, M.
Praena Rodríguez, Javier
Colonna, Nicola
Belloni, F.
Gonçalves, I. F.
Wisshak, K.
Capote, Roberto
Lozano Leyva, Manuel Luis
Quesada Molina, José Manuel
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Física Atómica, Molecular y Nuclear
European Commission (EC)
description The neutron-induced fission cross section of 236U was measured at the neutron Time-of-Flight (n-TOF) facility at CERN relative to the standard 235U(n,f) cross section for neutron energies ranging from above thermal to several MeV. The measurement, covering the full range simultaneously, was performed with a fast ionization chamber, taking advantage of the high resolution of the n-TOF spectrometer. The n-TOF results confirm that the first resonance at 5.45 eV is largely overestimated in some nuclear data libraries. The resonance triplet around 1.2 keV was measured with high resolution and resonance parameters were determined with good accuracy. Resonances at high energy have also been observed and characterized and different values for the cross section are provided for the region between 10 keV and the fission threshold. The present work indicates various shortcomings of the current nuclear data libraries in the subthreshold region and provides the basis for an accurate re-evaluation of the 236U(n,f) cross section, which is of great relevance for the development of emerging or innovative nuclear reactor technologies.
publishDate 2011
dc.date.none.fl_str_mv 2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11441/57198
url http://hdl.handle.net/11441/57198
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physical Review C - Nuclear Physics, 84 (4), 044618-1-044618-10.
FIKW-CT-2000-00107
10.1103/PhysRevC.84.044618
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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