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

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • 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

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2023-2024 Indian Academy of Sciences, Bengaluru.