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arXiv · 1304.2155

Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations

P. Sarriguren
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Abstract

Electron-capture rates at different density and temperature conditions are evaluated for a set of pf-shell nuclei representative of the constituents in presupernova formations. The nuclear structure part of the problem is described within a quasiparticle random-phase approximation based on a deformed Skyrme Hartree-Fock selfconsistent mean field with pairing correlations and residual interactions in particle-hole and particle-particle channels. The energy distributions of the Gamow-Teller strength are evaluated and compared to benchmark shell-model calculations and experimental data extracted from charge-exchange reactions. The model dependence of the weak rates are discussed and the various sensitivities to both density and temperature are analyzed.

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P. Sarriguren. 2013-04-08. Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations. https://doi.org/10.1103/physrevc.87.045801

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