• Relevance of thermally populated first excited state of 44Ti to the abundance problem of cassiopiea A: A model study

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      https://www.ias.ac.in/article/fulltext/pram/053/03/0469-0472

    • Keywords

       

      Nuclear structure; electron capture; nucleosynthesis; supernova

    • Abstract

       

      We examine the possible role of electron-capture on the thermally populated first 2+ excited state of 44Ti in hot astrophysical environments pertaining to post explosive nucleosynthesis supernova debris. We find in a simple schematic model that the astrophysical weak interaction rate for electron-capture decay of 44Ti can depend considerably on temperature and hence on time. We propose a time varying decay rate for the evolving supernova debris and demonstrate its consequence for the 44Ti mass yield of the supernova Cas A, observed through the measured 1.157 MeV γ-ray flux from the electron-capture decay of 44Ti.

    • Author Affiliations

       

      Sukhendusekhar Sarkar1

      1. Ananda Mohan College, 102/1, Raja Rammohan Sarani, Calcutta - 700 009, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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