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Comparison of Results from Recent NNSA and CEA Measurements of the $^{239}$Pu(n, f) Prompt Fission Neutron Spectrum

hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorKELLY, K.J.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorMARINI, Paola
hal.structure.identifierDirection des Applications Militaires [DAM]
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorTAIEB, J.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorDEVLIN, M.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorNEUDECKER, D.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorHAIGHT, R.C.
hal.structure.identifierDirection des Applications Militaires [DAM]
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorBÉLIER, G.
hal.structure.identifierDirection des Applications Militaires [DAM]
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorLAURENT, B.
hal.structure.identifierDirection des Applications Militaires [DAM]
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorMORFOUACE, P.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorO'DONNELL, J.M.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorBAUGE, E.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorCHADWICK, M.B.
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorCHATILLON, A.
hal.structure.identifierLaboratoire de physique corpusculaire de Caen [LPCC]
dc.contributor.authorETASSE, D.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorTALOU, P.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorWHITE, M.C.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorWU, C.Y.
hal.structure.identifierLos Alamos National Laboratory [LANL]
dc.contributor.authorBENNETT, E.A.
dc.date.issued2021-03
dc.identifier.issn0090-3752
dc.description.abstractEnThe National Nuclear Security Administration (NNSA)/DP French Alternative Energies and Atomic Energy Commission (CEA)/DAM agreement on cooperation on fundamental science is a U.S.-French collaborative effort to combine intellectual and experimental resources and further the relevant nuclear science. Recently, both the NNSA and CEA experimental teams performed high-statistics measurements of the 239Pu(n, f) prompt fission neutron spectrum (PFNS) at the Los Alamos Neutron Science Center, both of which were recently published in the journal Physical Review C. These separate measurements used the same experimental area and a common neutron detector array, but differ in many aspects, including background assessments, data acquisition systems and philosophies, fission detectors, and PFNS extraction techniques. Hence, some aspects of the experimental methods and associated uncertainties are highly correlated while others are independent. The results from both measurements broke new ground for PFNS measurements given their higher accuracy and more detailed study of corrections necessary for the measured quantity compared to existing literature measurements, and both will significantly impact PFNS nuclear data evaluations for the foreseeable future. The focus of this work is to document a comparison of the results from these distinct measurements in terms of the acquired data, the PFNS results, and the measured average PFNS energies. While systematic differences between the PFNS results are present on the 1–3% level, the acquired data relative to each respective measurement at low incident neutron energies are in remarkable agreement, as are the conclusions regarding the magnitude and position of features in the PFNS relating to second-chance fission, third-chance fission, and pre-equilibrium neutron emission.
dc.language.isoen
dc.publisherElsevier
dc.title.enComparison of Results from Recent NNSA and CEA Measurements of the $^{239}$Pu(n, f) Prompt Fission Neutron Spectrum
dc.typeArticle de revue
dc.identifier.doi10.1016/j.nds.2021.04.003
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
bordeaux.journalNuclear Data Sheets
bordeaux.page42 - 53
bordeaux.volume173
bordeaux.peerReviewedoui
hal.identifierhal-03218962
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03218962v1
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