Generalized-Seniority Pattern and Thermal Properties in Even Sn Isotopes
Abstract
Even tin isotopes of mass number are calculated with realistic interactions in the generalized-seniority approximation of the nuclear shell model. For each nucleus, we compute the lowest ten thousand states ( of each parity) up to around MeV in excitation energy, by allowing as many as four broken pairs. The lowest fifty eigen energies of each parity are compared with the exact results of the large-scale shell-model calculation. The wavefunctions of the mid-shell nuclei show a clear pattern of the stepwise breakup of condensed coherent pairs with increasing excitation energy. We also compute in the canonical ensemble the thermal properties -- level density, entropy, and specific heat -- in relation to the thermal pairing phase transition.
Cite
@article{arxiv.1605.02593,
title = {Generalized-Seniority Pattern and Thermal Properties in Even Sn Isotopes},
author = {L. Y. Jia and Chong Qi},
journal= {arXiv preprint arXiv:1605.02593},
year = {2016}
}