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dc.contributor.authorKostensalo, Joel
dc.contributor.authorSuhonen, Jouni
dc.date.accessioned2017-02-07T07:29:29Z
dc.date.available2017-02-07T07:29:29Z
dc.date.issued2017
dc.identifier.citationKostensalo, J., & Suhonen, J. (2017). Spin-multipole nuclear matrix elements in the pn quasiparticle random-phase approximation: Implications for β and ββ half-lives. <i>Physical Review C</i>, <i>95</i>(1), Article 014322. <a href="https://doi.org/10.1103/PhysRevC.95.014322" target="_blank">https://doi.org/10.1103/PhysRevC.95.014322</a>
dc.identifier.otherCONVID_26528680
dc.identifier.otherTUTKAID_72878
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/52972
dc.description.abstractHalf-lives for 148 potentially measurable 2nd-, 3rd-, 4th-, 5th-, 6th-, and 7th-forbidden unique beta transitions are predicted. To achieve this, the ratio of the nuclear matrix elements (NMEs), calculated by the proton-neutron quasiparticle random-phase approximation (pnQRPA), MpnQRPA, and a two-quasiparticle (two-qp) model, Mqp, is studied and compared with earlier calculations for the allowed Gamow-Teller (GT) 1+ and first-forbidden spin-dipole (SD) 2− transitions. The present calculations are done using realistic single-particle model spaces and G-matrix based microscopic two-body interactions. In terms of the ratio k = MpnQRPA/Mqp the studied decays fall into two groups: for GROUP 1, which consists of transitions involving non-magic nuclei, the ratio turns out to be k = 0.29 ± 0.15. For GROUP 2, consisting of transitions involving semimagic nuclei, the ratio is 0.5–0.8 for half of the decays and less than 5 × 10−3 for the other half. The magnitudes of the NMEs for several nuclei of GROUP 2 depend sensitively on the size of the used single-particle space and the energies of few key single-particle orbitals used in the pnQRPA calculation, while no such dependence is found for the transitions involving nuclei of GROUP 1. Comparing the NME ratios k of GROUP 1 with those of the earlier GT and SD calculations, where also experimental data are available, the expected “experimental” half-lives for the decays between the 0+ ground state of the even-even reference nuclei and the J π = 3+,4−,5+,6−,7+,8− states of the neighboring odd-odd nuclei are derived for possible experimental verification. The present results could also shed light to the magnitudes of the NMEs corresponding to the high-forbidden unique 0+ → J π = 3+,4−,5+,6−,7+,8− virtual transitions taking part in the neutrinoless double beta decays.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review C
dc.subject.otherbeta decay
dc.subject.otherforbidden beta decay
dc.subject.othernuclear matrix elements
dc.subject.otherproton-neutron quasiparticle random-phase approximation
dc.titleSpin-multipole nuclear matrix elements in the pn quasiparticle random-phase approximation: Implications for β and ββ half-lives
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201702031356
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2017-02-03T16:15:08Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9985
dc.relation.numberinseries1
dc.relation.volume95
dc.type.versionpublishedVersion
dc.rights.copyright© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1103/PhysRevC.95.014322
dc.type.okmA1


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