Relevance of thermally populated first excited state of 44Ti to the abundance problem of cassiopiea A: A model study |
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Authors: | Sukhendusekhar Sarkar |
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Institution: | (1) Ananda Mohan College, 102/1, Raja Rammohan Sarani, 700 009 Calcutta, India |
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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. |
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Keywords: | Nuclear structure electron capture nucleosynthesis supernova |
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