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arXiv · 1210.3213

Measurement of the damping of nuclear shell effect in the doubly magic $^{208}$Pb region

P. C. Rout·D. R. Chakrabarty·V. M. Datar·Suresh Kumar·E. T Mirgule·A. Mitra·V. Nanal·S. P. Behera·V. Singh
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Abstract

The damping of the nuclear shell effect with excitation energy has been measured through an analysis of the neutron spectra following the triton transfer in the $^7$Li induced reaction on $^{205}$Tl. The measured neutron spectra demonstrate the expected large shell correction energy for the nuclei in the vicinity of doubly magic $^{208}$Pb and a small value for $^{184}$W. A quantitative extraction of the allowed values of the damping parameter $\gamma$, along with those for the asymptotic nuclear level density parameter $\tilde{a}$, has been made for the first time.

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P. C. Rout, D. R. Chakrabarty, V. M. Datar, Suresh Kumar, E. T Mirgule, A. Mitra, V. Nanal, S. P. Behera, V. Singh. 2012-10-11. Measurement of the damping of nuclear shell effect in the doubly magic $^{208}$Pb region. https://doi.org/10.1103/physrevlett.110.062501

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