Articles written in Pramana – Journal of Physics
Volume 32 Issue 4 April 1989 pp 497-505 Statistical Nuclear Physics
Spectral distribution theory—Some recent applications
Kamales Kar Sukhendusekhar Sarkar
The application of spectral distribution theory for binding energy, spectra and occupancies using universal-
Volume 53 Issue 3 September 1999 pp 469-472 Nuclear Structure And Dynamics
Relevance of thermally populated first excited state of 44Ti to the abundance problem of cassiopiea A: A model study
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.
Volume 94 All articles Published: 10 July 2020 Article ID 0100 Research Article
The linear term in the isobaric-mass-multiplet equation for $fp$-shell nuclei in the framework of spectral distribution theory
KAMALES KAR SUKHENDUSEKHAR SARKAR
The one- plus two-body isospin non-conserving nuclear interactions, namely the isovector and isotensor ones, are included in the prediction of the energies of the ground state and the low-lying states of the $fp$ shell nuclei using spectral distribution theory. This in turn is used to calculate the linear term in the isobaric mass-multiplet equation and the predictions are then compared with experimental values after the addition of the Coulomb contribution. The agreement is found to be good as observed for $sd$ shell nuclei earlier. One also sees that in this method the contribution to the linear term comes almost completely from the one-body isovector Hamiltonian, resulting in a huge simpliﬁcation of the problem.
Volume 97, 2023
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