Shape mixing and beta-decay properties of neutron-deficient Kr and Sr isotopes

Abstract

Gamow-Teller strength distributions and beta-decay half-lives in neutron-deficient Kr and Sr isotopes are investigated within a deformed quasiparticle random phase approximation. The approach is based on a selfconsistent Skyrme Hartree-Fock mean field with pairing correlations and residual separable particle-hole and particle-particle forces. A simple two-level model is used to mix the nuclear shapes into the physical ground state. Good agreement with experiment is found with shape mixing coefficients which are consistent with those obtained phenomenologically from mixing of rotational bands.

14 pages, 6 figures. To be published in Phys. Rev. C

References in corpus (6)

• Deformation of the N=Z nucleus 76Sr using beta-decay studies
• Shape coexistence in neutron-deficient Kr isotopes: Constraints on the single-particle spectrum of self-consistent mean-field models from collective excitations
• Spin-isospin excitations and beta+/EC half-lives of medium-mass deformed nuclei
• Beta-decay in odd-A and even-even proton-rich Kr isotopes
• Half-lives of rp-process waiting point nuclei
• Nuclear shape dependence of Gamow-Teller distributions in neutron-deficient Pb isotopes

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• Gamow-Teller response in deformed even and odd neutron-rich Zr and Mo isotopes
• Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations
• Stellar weak decay rates in neutron-deficient medium-mass nuclei
• Total Absorption Spectroscopy Study of the Beta Decay of ${}^{86}$Br and ${}^{91}$Rb
• Weak interaction rates for Kr and Sr waiting-point nuclei under rp-process conditions
• Effects of deformation on the beta-decay patterns of light even-even and odd-mass Hg and Pt isotopes
• Microscopic calculations of weak decays in superheavy nuclei
• Deformation effects on the Gamow-Teller strength distributions in the double-beta decay partners 76Ge and 76Se
• Contribution of excited states to stellar weak-interaction rates in odd-A nuclei
• $\beta$-decay half-lives and nuclear structure of exotic proton-rich waiting point nuclei under $rp$-process conditions
• Beta-decay properties of neutron-rich rare-earth isotopes
• Beta-decay properties of neutron-rich Ca, Ti, and Cr isotopes
• Self-consistent calculations of electron-capture decays in Z=118, 119, and 120 superheavy isotopes
• Competition between weak and alpha-decay modes in superheavy nuclei
• Electron-capture decay in isotopic transfermium chains from self-consistent calculations
• Nuclear structure and weak rates of heavy waiting point nuclei under rp-process conditions
• Nuclear structure calculations for two-neutrino double-beta decay