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

Y. F. Niu (牛一斐), N. Paar, D. Vretenar, and J. Meng (孟杰)
Phys. Rev. C 83, 045807 – Published 27 April 2011

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 Fe54,56 and Ge76,78 in stellar environment, and results compared with predictions of similar and complementary model calculations.

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  • Received 17 March 2011

DOI:https://doi.org/10.1103/PhysRevC.83.045807

©2011 American Physical Society

Authors & Affiliations

Y. F. Niu (牛一斐)1, N. Paar2, D. Vretenar2, and J. Meng (孟杰)3,1,4,*

  • 1State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
  • 2Physics Department, Faculty of Science, University of Zagreb, Zagreb, Croatia
  • 3School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
  • 4Department of Physics, University of Stellenbosch, Stellenbosch 7602, South Africa

  • *mengj@pku.edu.cn

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Vol. 83, Iss. 4 — April 2011

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