• Beta decay rates of nuclei with $65 < A < 75$ for pre-supernova and supernova evolution

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      https://www.ias.ac.in/article/fulltext/pram/068/03/0423-0433

    • Keywords

       

      Beta decay rates; supernova evolution; spectral distribution method.

    • Abstract

       

      The half-lives are calculated for the $\beta^{-}$ decay process for nuclei in the mass range $\sim 65-75$ relevant for the core of a massive star at the late burning stage of stellar evolution and the collapse that leads to supernova explosion. These half-lives and rates are calculated by expressing the $\beta^{-}$ Gamow-Teller decay strengths in terms of smoothed bivariate strength densities. These strength densities are constructed in the framework of spectral averaging theory for two-body nuclear Hamiltonian in a large nuclear shell model space. The method has a natural extension to electron captures as well as weak interaction rates for 𝑟 and $rp$-processes.

    • Author Affiliations

       

      Debasish Majumdar1 Kamales Kar1

      1. Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700 064, India
    • Dates

       
  • Pramana – Journal of Physics | News

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