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First simultaneous measurement of fission and gamma probabilities of $^{237}$U and $^{239}$Np via surrogate reactions

hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorMARINI, P.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
hal.structure.identifierCEA Cadarache
dc.contributor.authorDUCASSE, Q.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorJURADO, B.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorAICHE, M.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorMATHIEU, L.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorBARREAU, G.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorCZAJKOWSKI, S.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorTSEKHANOVICH, I.
dc.contributor.authorMORO, A.
dc.contributor.authorLEI, J.
dc.contributor.authorGIACOPPO, F.
dc.contributor.authorGORGEN, A.
hal.structure.identifierInstitut de Physique Nucléaire d'Orsay [IPNO]
dc.contributor.authorAUDOUIN, L.
hal.structure.identifierInstitut de Physique Nucléaire d'Orsay [IPNO]
dc.contributor.authorTASSAN-GOT, L.
hal.structure.identifierInstitut de Physique Nucléaire d'Orsay [IPNO]
dc.contributor.authorWILSON, J.N.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorGUNSING, F.
dc.contributor.authorGUTTORMSEN, M.
dc.contributor.authorLARSEN, A.C.
hal.structure.identifierInstitut de Physique Nucléaire d'Orsay [IPNO]
dc.contributor.authorLEBOIS, M.
dc.contributor.authorRENSTROM, T.
dc.contributor.authorROSE, S.
dc.contributor.authorSIEM, S.
dc.contributor.authorTVETEN, G.M.
dc.contributor.authorWIEDEKING, M.
hal.structure.identifierCEA Cadarache
dc.contributor.authorSEROT, O.
hal.structure.identifierDirection des Applications Militaires [DAM]
dc.contributor.authorBOUTOUX, G.
hal.structure.identifierDirection des Applications Militaires [DAM]
dc.contributor.authorMÉOT, V.
hal.structure.identifierDirection des Applications Militaires [DAM]
dc.contributor.authorMORILLON, B.
hal.structure.identifierDirection des Applications Militaires [DAM]
dc.contributor.authorDENIS-PETIT, D.
hal.structure.identifierDirection des Applications Militaires [DAM]
dc.contributor.authorROIG, O.
dc.contributor.authorOBERSTEDT, S.
dc.contributor.authorOBERSTEDT, A.
dc.date.issued2016
dc.date.conference2015-10-19
dc.description.abstractEnFission and gamma decay probabilities of ^237U and ^239Np have been measured, for the first time simultaneously in dedicated experiments, via the surrogate reactions ^238U(^3He, ^4He) and ^238U(^3He,d), respectively. While a good agreement between our data and neutron-induced data is found for fission probabilities, gamma decay probabilities are several times higher than the corresponding neutron-induced data for each studied nucleus. We study the role of the different spin distributions populated in the surrogate and neutron-induced reactions. The compound nucleus spin distribution populated in the surrogate reaction is extracted from the measured gamma-decay probabilities, and used as input parameter in the statistical model to predict fission probabilities to be compared to our data. A strong disagreement between our data and the prediction is obtained. Preliminary results from an additional dedicated experiment confirm the observed discrepancies, indicating the need of a better understanding of the formation and decay processes of the compound nucleus.
dc.language.isoen
dc.source.titleEPJ Web Conf.
dc.title.enFirst simultaneous measurement of fission and gamma probabilities of $^{237}$U and $^{239}$Np via surrogate reactions
dc.typeCommunication dans un congrès
dc.identifier.doi10.1051/epjconf/201612212004
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
bordeaux.page12004
bordeaux.volume122
bordeaux.countryJP
bordeaux.title.proceedingEPJ Web Conf.
bordeaux.conference.cityTokyo
bordeaux.peerReviewednon
hal.identifierhal-01554279
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2015-10-23
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01554279v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=EPJ%20Web%20Conf.&rft.date=2016&rft.volume=122&rft.spage=12004&rft.epage=12004&rft.au=MARINI,%20P.&DUCASSE,%20Q.&JURADO,%20B.&AICHE,%20M.&MATHIEU,%20L.&rft.genre=unknown


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