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

A. F. Fantina; E. Khan; G. Colò; N. Paar; D. Vretenar

doi:10.1103/PhysRevC.86.035805

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

A. F. Fantina E. Khan ¹ G. Colò N. Paar D. Vretenar

1 IPNO - Institut de Physique Nucléaire d'Orsay

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.

Document type :

Journal articles

Physical Review C, American Physical Society, 2012, 86, pp.035805. <10.1103/PhysRevC.86.035805>

Domain :

Physics / Astrophysics / Solar and Stellar Astrophysics

Sciences of the Universe / Astrophysics / Solar and Stellar Astrophysics

Physics / Nuclear Theory

http://hal.in2p3.fr/in2p3-00744447
Contributor : Sophie Heurteau <>
Submitted on : Tuesday, October 23, 2012 - 11:00:50 AM
Last modification on : Tuesday, October 23, 2012 - 11:11:27 AM

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

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