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arXiv · 2012.03465

Nuclear level density and thermal properties of $^{115}$Sn from neutron evaporation

Pratap Roy·K. Banerjee·T. K. Rana·S. Kundu·Deepak Pandit·N. Quang Hung·T. K. Ghosh·S. Mukhopadhyay·D. Mondal·G. Mukherjee·S. Manna·A. Sen·S. Pal·R. Pandey·D. Paul·K. Atreya·C. Bhattacharya
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Abstract

The nuclear level density of $^{115}$Sn has been measured in an excitation energy range of $\sim $2 - 9 MeV using the experimental neutron evaporation spectra from the $^{115}$In($p,n$)$^{115}$Sn reaction. The experimental level densities were compared with the microscopic Hartree-Fock BCS (HFBCS), Hartree-Fock-Bogoliubov plus combinatorial (HFB+C), and an exact pairing plus independent particle model (EP+IPM) calculations. It is observed that the EP+IPM provides the most accurate description of the experimental data. The thermal properties (entropy and temperature) of $^{115}$Sn have been investigated from the measured level densities. The experimental temperature profile as well as the calculated heat capacity show distinct signatures of a transition from the strongly-paired nucleonic phase to the weakly paired one in this nucleus.

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Pratap Roy, K. Banerjee, T. K. Rana, S. Kundu, Deepak Pandit, N. Quang Hung, T. K. Ghosh, S. Mukhopadhyay, D. Mondal, G. Mukherjee, S. Manna, A. Sen, S. Pal, R. Pandey, D. Paul, K. Atreya, C. Bhattacharya. 2020-12-07. Nuclear level density and thermal properties of $^{115}$Sn from neutron evaporation. https://doi.org/10.1140/epja/s10050-021-00373-3

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