Barrier penetration and rotational damping of thermally excited superdeformed nuclei

K. Yoshida, M. Matsuo, Y. R. Shimizu

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26 Citations (Scopus)

Abstract

We construct a microscopic model of thermally excited superdeformed states that describes both the barrier penetration mechanism, leading to the decay-out transitions to normal deformed states, and the rotational damping causing fragmentation of rotational E2 transitions. We describe the barrier penetration by means of a tunneling path in the two-dimensional deformation energy surface, which is calculated with the cranked Nilsson-Strutinsky model. The individual excited superdeformed states and associated E2 transition strengths are calculated by the shell-model diagonalization of the many-particle-many-hole excitations interacting with the delta-type residual two-body force. The effects of the decay-out on the excited superdeformed states are discussed in detail for 152Dy, 143Eu and 192Hg. The model predicts that the decay-out brings about a characteristic decrease in the effective number of excited superdeformed rotational bands.

Original languageEnglish
Pages (from-to)85-122
Number of pages38
JournalNuclear Physics A
Volume696
Issue number1-2
DOIs
Publication statusPublished - Dec 17 2001

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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