Stellar electron-capture rates on nuclei based on a microscopic Skyrme functional

Fantina, A. F. and Khan, E. and Colo, G. and Paar, Nils and Vretenar, Dario (2012) Stellar electron-capture rates on nuclei based on a microscopic Skyrme functional. Physical Review C, 86 (3). pp. 35805-9. ISSN 0556-2813

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Abstract

We compute electron-capture rates for 54, 56Fe and Ge isotopes using a self-consistent microscopic approach. The single-nucleon basis and the occupation factors in the target nucleus are calculated in the finite-temperature Skyrme Hartree-Fock model, and the Jπ=0±, 1±, 2± charge-exchange transitions are determined in the finite-temperature random-phase approximation (RPA). The scheme is self-consistent ; i.e., both the Hartree-Fock and the RPA equations are based on the same Skyrme functional. Several interactions are used in order to provide a theoretical uncertainty on the electron-capture rates for different astrophysical conditions. Comparing electron-capture rates obtained either with different Skyrme sets or with different available models indicates that differences up to one to two orders of magnitude can arise.

Item Type: Article
Keywords: stellar elecetron capture rates, skyrme energy density functional, random phase approximation
Date: September 2012
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2012) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 03 Jun 2014 08:13
Last Modified: 23 Feb 2016 15:54
URI: http://digre.pmf.unizg.hr/id/eprint/2143

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