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

Scientific paper - Original scientific paper

• Author: Y. F. Niu
• Author: Nils Paar
• Author: Dario Vretenar
• Author: Jie Meng
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): 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
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C - Nuclear Physics
• Numbering: vol. 83, no. 4, 045807
• p-ISSN: 0556-2813
• e-ISSN: 1089-490X
• DOI: https://doi.org/10.1103/PhysRevC.83.045807
• URN:NBN: urn:nbn:hr:217:940423
• Publication: 2011
• Document URL: http://link.aps.org/doi/10.1103/PhysRevC.83.045807
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2011) by the American Physical Society. Received 17 March 2011; published 27 April 2011.
• Created on: 2019-11-15 14:18:42