Calculation of stellar electron-capture cross sections on nuclei based on microscopic Skyrme functionals

Paar, Nils and Colo, G. and Khan, E. and Vretenar, Dario (2009) Calculation of stellar electron-capture cross sections on nuclei based on microscopic Skyrme functionals. Physical Review C, 80 (5). pp. 55801-15. ISSN 0556-2813

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Abstract

A fully self-consistent microscopic framework for the evaluation of nuclear weak-interaction rates at finite temperature is introduced, based on Skyrme functionals. The single-nucleon basis and the corresponding thermal occupation factors of the initial nuclear state are determined in the finite-temperature Skyrme Hartree-Fock model and charge-exchange transitions to excited states are computed using the finite-temperature random-phase approximation (RPA). Effective interactions are implemented self-consistently: Both the finite-temperature single-nucleon Hartree-Fock equations and the matrix equations of RPA are based on the same Skyrme energy density functional. Using a representative set of Skyrme functionals, the model is applied in the calculation of stellar electron-capture cross sections for selected nuclei in the iron mass group and for neutron-rich Ge isotopes.

Item Type: Article
Keywords: weak interaction, electron capture, supernova
Date: November 2009
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2009) 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: 30 May 2014 16:08
Last Modified: 30 May 2014 16:08
URI: http://digre.pmf.unizg.hr/id/eprint/2024

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