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Parity restoration in the Highly Truncated Diagonalization Approach: application to the outer fission barrier of $^{240}$Pu

dc.contributor.authorV. NHAN HAO, T.
hal.structure.identifierPhysique théorique [THEORIE]
dc.contributor.authorQUENTIN, P.
hal.structure.identifierPhysique théorique [THEORIE]
dc.contributor.authorBONNEAU, L.
dc.date.issued2012-12-10
dc.identifier.issn2469-9985
dc.description.abstractEnThe restoration of the parity symmetry has been performed in the framework of the Highly Truncated Diagonalization Approach suited to treat correlations in an explicitly particle-number conserving microscopic approach. To do so we have assumed axial symmetry and used a generalized Wick's theorem due to Löwdin in a projection-after-variation scheme. We have chosen the Skyrme SkM$^*$ energy-density functional for the particle-hole channel and a density-independent delta force for the residual interaction. We have applied this approach in the region of the outer fission barrier of the $^{240}$Pu nucleus. As a result, we have shown that the $K^{\pi} = 0^+$ fission isomeric state is statically unstable against intrinsic-parity breaking modes, while the projection does not affect the energy at the top of the intrinsic outer fission barrier. Altogether, this leads to an increase of the height of the outer fission barrier--with respect to the fission isomeric state--by about 350 keV, affecting thus significantly the fission-decay lifetime of the considered fission isomer.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enParity restoration in the Highly Truncated Diagonalization Approach: application to the outer fission barrier of $^{240}$Pu
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevC.86.064307
dc.subject.halPhysique [physics]/Physique Nucléaire Théorique [nucl-th]
dc.identifier.arxiv1210.0454
bordeaux.journalPhysical Review C
bordeaux.page064307
bordeaux.volume86
bordeaux.peerReviewedoui
hal.identifierin2p3-00769758
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00769758v1
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