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Constant-temperature level densities in the quasi-continuum of Th and U isotopes

dc.contributor.authorGUTTORMSEN, M.
hal.structure.identifierAval du cycle et Energie Nucléaire [ACEN]
dc.contributor.authorJURADO, B.
dc.contributor.authorWILSON, J. N.
hal.structure.identifierAval du cycle et Energie Nucléaire [ACEN]
dc.contributor.authorAICHE, M.
dc.contributor.authorBERNSTEIN, L. A.
dc.contributor.authorDUCASSE, Q.
dc.contributor.authorGIACOPPO, F.
dc.contributor.authorGOERGEN, A.
hal.structure.identifierInstitut de Recherches sur les lois Fondamentales de l'Univers [IRFU]
dc.contributor.authorGUNSING, F.
dc.contributor.authorHAGEN, T. W.
dc.contributor.authorLARSEN, A. C.
hal.structure.identifierInstitut de Physique Nucléaire d'Orsay [IPNO]
dc.contributor.authorLEBOIS, M.
dc.contributor.authorLENIAU, B.
dc.contributor.authorRENSTROEM, T.
dc.contributor.authorROSE, S. J.
dc.contributor.authorSIEM, S.
dc.contributor.authorTORNYI, T.
dc.contributor.authorTVETEN, G. M.
dc.contributor.authorWIEDEKING, M.
dc.date.issued2013
dc.identifier.issn2469-9985
dc.description.abstractEnParticle-gamma coincidences have been measured to obtain gamma-ray spectra as a function of excitation energy for 231-233Th and 237-239U. The level densities, which were extracted using the Oslo method, show a constant temperature behavior. The isotopes display very similar temperatures in the quasi-continuum, however, the even-odd isotopes reveal a constant entropy increase Delta S compared to their even-even neighbors. The entropy excess depends on available orbitals for the last unpaired valence neutron of the heated nuclear system. Also, experimental microcanonical temperature and heat capacity have been extracted. Several poles in the heat capacity curve support the idea that an almost continuous melting of Cooper pairs is responsible for the constant-temperature behavior.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enConstant-temperature level densities in the quasi-continuum of Th and U isotopes
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevC.88.024307
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
dc.identifier.arxiv1306.5955
bordeaux.journalPhysical Review C
bordeaux.page024307
bordeaux.volume88
bordeaux.peerReviewedoui
hal.identifierin2p3-00854657
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00854657v1
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