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Effect of pairing correlations on the isospin-mixing parameter in deformed N = Z even-even nuclei

hal.structure.identifierPhysique théorique [THEORIE]
dc.contributor.authorLE BLOAS, J.
hal.structure.identifierPhysique théorique [THEORIE]
dc.contributor.authorBONNEAU, L.
hal.structure.identifierPhysique théorique [THEORIE]
dc.contributor.authorQUENTIN, P.
hal.structure.identifierInstitut Pluridisciplinaire Hubert Curien [IPHC]
dc.contributor.authorBARTEL, J.
dc.contributor.authorD. STROTTMAN, D.
dc.date.issued2012
dc.identifier.issn2469-9985
dc.description.abstractEnWithin the particle-number conserving highly truncated diagonalization approach (amounting to a severely truncated shell model built on self-consistent mean-field single-particle states), we investigate the isospin mixing in the ground state of axially deformed even-even N = Z nuclei with A < 80. The Skyrme interaction in its SIII parametrization is used to generate the self-consistent mean-field solution, whereas the effective residual interaction is approximated by density-independent δ interactions in the T = 0 and T = 1 isospin channels. In the correlated ground state of the considered nuclei, the obtained values of the isospin-mixing parameter range from a fewtens of a percent to a couple of percents. The pairing correlations in both isospin channels are found to increase a little the isospin-mixing parameter with respect to the Hartree-Fock value by two competing mechanisms. In the T = 0 channel, isospin mixing is brought mostly by neutron-proton one-pair excitations, whereas in the T = 1 channel it is essentially generated by the difference between neutron-neutron and proton-proton one-pair excitations.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enEffect of pairing correlations on the isospin-mixing parameter in deformed N = Z even-even nuclei
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevC.86.034332
dc.subject.halPhysique [physics]/Physique Nucléaire Théorique [nucl-th]
bordeaux.journalPhysical Review C
bordeaux.page034332
bordeaux.volume86
bordeaux.peerReviewedoui
hal.identifierin2p3-00747326
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00747326v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Physical%20Review%20C&amp;rft.date=2012&amp;rft.volume=86&amp;rft.spage=034332&amp;rft.epage=034332&amp;rft.eissn=2469-9985&amp;rft.issn=2469-9985&amp;rft.au=LE%20BLOAS,%20J.&amp;BONNEAU,%20L.&amp;QUENTIN,%20P.&amp;BARTEL,%20J.&amp;D.%20STROTTMAN,%20D.&amp;rft.genre=article


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