Nuclear structure properties and stellar weak rates for Se-76: Unblocking of the Gamow Teller strength

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dc.contributor.authorNabi, Jameel-Un
dc.contributor.authorIshfaq, Mavra
dc.contributor.authorBoyukata, Mahmut
dc.contributor.authorRiaz, Muhammad
dc.date.accessioned2020-06-25T18:22:41Z
dc.date.available2020-06-25T18:22:41Z
dc.date.issued2017
dc.departmentKırıkkale Üniversitesi
dc.description.abstractAt finite temperatures (>= 10(7)K), Se-76 is abundant in the core of massive stars and electron capture on Se-76 has a consequential role to play in the dynamics of core-collapse. The present work may be classified into two main categories. In the first phase we study the nuclear structure properties of Se-76 using the interacting boson model-1 (IBM-1). The IBM-1 investigations include the energy levels, B (E2) values and the prediction of the geometry. We performed the extended consistent-Q formalism (ECQF) calculation and later the triaxial formalism calculation (constructed by adding the cubic term to the ECQF). The geometry of Se-76 can be envisioned within the formalism of the potential energy surface based on the classical limit of IBM-1 model. In the second phase, we reconfirm the unblocking of the Gamow Teller (GT) strength in Se-76 (a test case for nuclei having N > 40 and Z < 40). Using the deformed pn-QRPA model we calculate GT transitions, stellar electron capture cross section (within the limit of low momentum transfer) and stellar weak rates for Se-76. The distinguishing feature of our calculation is a state-by-state evaluation of stellar weak rates in a fully microscopic fashion. Results are compared with experimental data and previous calculations. The calculated GT distribution fulfills the Ikeda sum rule. Rates for, beta-delayed neutrons and emission probabilities are also calculated. Our study suggests that at high stellar temperatures and low densities, the beta(+)-decay on Se-76 should not be neglected and needs to be taken into consideration along with electron capture rates for simulation of presupernova evolution of massive stars. (C) 2017 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipHigher Education Commission (Pakistan) through HEC [20-3099, 5557/KPK/NRPU/RD/HEC/2016]en_US
dc.description.sponsorshipJ.-U. Nabi wishes to acknowledge the support provided by the Higher Education Commission (Pakistan) through HEC Projects No. 20-3099 and 5557/KPK/NRPU/R&D/HEC/2016.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.nuclphysa.2017.05.091
dc.identifier.endpage19en_US
dc.identifier.issn0375-9474
dc.identifier.issn1873-1554
dc.identifier.scopus2-s2.0-85020200052
dc.identifier.scopusqualityQ2
dc.identifier.startpage1en_US
dc.identifier.urihttps://doi.org/10.1016/j.nuclphysa.2017.05.091
dc.identifier.urihttps://hdl.handle.net/20.500.12587/6865
dc.identifier.volume966en_US
dc.identifier.wosWOS:000411536200001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Bven_US
dc.relation.ispartofNuclear Physics A
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectGamow-Teller transitionsen_US
dc.subjectpn-QRPA modelen_US
dc.subjectIBM modelen_US
dc.subjectNuclear structureen_US
dc.subjectElectron captureen_US
dc.subjectbeta-Delayed neutron emissionsen_US
dc.titleNuclear structure properties and stellar weak rates for Se-76: Unblocking of the Gamow Teller strengthen_US
dc.typeArticle

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