Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations
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.
Cite
@article{arxiv.1304.2155,
title = {Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations},
author = {P. Sarriguren},
journal= {arXiv preprint arXiv:1304.2155},
year = {2013}
}
Comments
18 pages, 26 figures. arXiv admin note: text overlap with arXiv:1102.0628