Stellar electron-capture rates calculated with the finite-temperature relativistic random-phase approximation

Niu, Y. F. and Paar, Nils and Vretenar, Dario and Meng, Jie (2011) Stellar electron-capture rates calculated with the finite-temperature relativistic random-phase approximation. Physical Review C, 83 (4). pp. 45807-10. ISSN 0556-2813

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Abstract

We introduce a self-consistent microscopic theoretical framework for modeling the process of electron capture on nuclei in stellar environment, based on relativistic energy density functionals. The finite-temperature relativistic mean-field model is used to calculate the single-nucleon basis and the occupation factors in a target nucleus, and Jπ=0±, 1±, and 2± charge- exchange transitions are described by the self-consistent finite- temperature relativistic random-phase approximation. Cross sections and rates are calculated for electron capture on 54, 56Fe and 76, 78Ge in stellar environment, and results compared with predictions of similar and complementary model calculations.

Item Type: Article
Keywords: weak-interaction rates ; intermediate-mass nuclei ; Mean-field theory ; Hartree-bogoliubov theory ; shell-model calculations ; range a=45-65 ; rate tables ; FP-shell ; environments ; supernovae
Date: April 2011
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2011) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010, UKF 17/08
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 01 Jun 2014 19:46
Last Modified: 24 Feb 2016 15:21
URI: http://digre.pmf.unizg.hr/id/eprint/2071

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