Microscopic structure of high-spin vibrational excitations in superdeformed 190,192,194Hg

Takashi Nakatsukasa, Kenichi Matsuyanagi, Shoujirou Mizutori, Yoshifumi Shimizu

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

Microscopic calculations based on the cranked shell model extended by the random-phase-approximation are performed to investigate the quadrupole and octupole correlations for excited superdeformed bands in 190Hg, 192Hg, and 194Hg. The K=2 octupole vibrations are predicted to be the lowest excitation modes at zero rotational frequency. At finite frequency, however, the interplay between rotation and vibrations produces different effects depending on neutron number: The lowest octupole phonon is rotationally aligned in 190Hg, is crossed by the aligned two-quasiparticle bands in 192Hg, and retains the K=2 octupole vibrational character up to the highest frequency in 194Hg. The γ vibrations are predicted to be higher in energy and less collective than the octupole vibrations. From a comparison with the experimental dynamic moments of inertia, a new interpretation of the observed excited bands invoking the K=2 octupole vibrations is proposed, which suggests those octupole vibrations may be prevalent in superdeformed Hg nuclei.

Original languageEnglish
Pages (from-to)2213-2226
Number of pages14
JournalPhysical Review C - Nuclear Physics
Volume53
Issue number5
DOIs
Publication statusPublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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