Half-lives of rp-process waiting point nuclei

Abstract

We give results of microscopic calculations for the half-lives of various proton-rich nuclei in the mass region A=60-90, which are involved in the astrophysical rp-process, and which are needed as input parameters of numerical simulations in Nuclear Astrophysics. The microscopic formalism consists of a deformed QRPA approach that involves a selfconsistent quasiparticle deformed Skyrme Hartree-Fock basis and residual spin-isospin separable forces in both the particle-hole and particle-particle channels. The strength of the particle-hole residual interaction is chosen to be consistent with the Skyrme effective force and mean field basis, while that of the particle-particle is globally fixed to 0.07 MeV after a judicious choice from comparison to experimental half-lives. We study and discuss the sensitivity of the half-lives to deformation and residual interactions.

8 pages, 4 figures, to be published in Eur. Phys. J. A

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• Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations
• Stellar weak decay rates in neutron-deficient medium-mass nuclei
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• 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
• $\beta$-Decay Half-Life of the $rp$-Process Waiting Point Nuclide ${}^{84}$Mo
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• 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
• Competition between weak and alpha-decay modes in superheavy nuclei
• Self-consistent calculations of electron-capture decays in Z=118, 119, and 120 superheavy isotopes
• Nuclear Weak Rates and Detailed Balance in Stellar Conditions
• On the role of pairing correlations in calculation of \b{eta}-decay half-lives within QRPA formalism