Strongly screening \(\gamma\)-ray heating rates by \(\beta^{-}\) decay of 59Co, 55Co, 56Ni, and 56Fe in presupernova

Abstract

Based on the Shell-Model, and the linear response theory, we discuss the influence of strong electron screening (SES) on the \(\gamma\)-ray heating rates (GRHR) by beta decay for several typical iron group nuclei. We calculate the screening potential caused by the relativistically degenerate electron. We also investigate the effect of SES on beta decay Q-value, electron chemical potential, as well as the shell and pair effects. We find that the GRHR increase by several orders magnitude and the screening enhancement factor can get to 76.83 due to SES.

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Acknowledgements

This work was supported in part by the National Natural Science Foundation of China under grants 11565020, 11965010, and the Counterpart Foundation of Sanya under grant 2016PT43, 2019PT76, and the Special Foundation of Science and Technology Cooperation for Advanced Academy and Regional of Sanya under grant 2016YD28, the Scientific Research Starting Foundation for 515 Talented Project of Hainan Tropical Ocean University under grant RHDRC201701, and the Natural Science Foundation of Hainan Province under grant 118MS071.

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Correspondence to Jing-Jing Liu.

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Liu, JJ., Liu, DM. Strongly screening \(\gamma\)-ray heating rates by \(\beta^{-}\) decay of 59Co, 55Co, 56Ni, and 56Fe in presupernova. Astrophys Space Sci 364, 192 (2019). https://doi.org/10.1007/s10509-019-3682-1

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Keywords

  • Physical data and processes: nuclear reactions
  • Nucleosynthesis
  • Abundances—stars: supernova