dorsal/arxiv
View SchemaMicroscopic Structure of High-Spin Vibrational Excitations in Superdeformed 190,192,194Hg
| Authors | Takashi Nakatsukasa, Kenichi Matsuyanagi, Shoujirou Mizutori, Yoshifumi R. Shimizu |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9512003 |
| URL | https://arxiv.org/abs/nucl-th/9512003 |
| DOI | 10.1103/PhysRevC.53.2213 |
| Journal | Phys.Rev.C53:2213-2226,1996 |
Abstract
Microscopic RPA calculations based on the cranked shell model 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 gamma 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 SD Hg nuclei.
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"abstract": "Microscopic RPA calculations based on the cranked shell model are performed\nto investigate the quadrupole and octupole correlations for excited\nsuperdeformed bands in 190Hg, 192Hg, and 194Hg. The K=2 octupole vibrations are\npredicted to be the lowest excitation modes at zero rotational frequency. At\nfinite frequency, however, the interplay between rotation and vibrations\nproduces different effects depending on neutron number: The lowest octupole\nphonon is rotationally aligned in 190Hg, is crossed by the aligned\ntwo-quasiparticle bands in 192Hg, and retains the K=2 octupole vibrational\ncharacter up to the highest frequency in 194Hg. The gamma vibrations are\npredicted to be higher in energy and less collective than the octupole\nvibrations. From a comparison with the experimental dynamic moments of inertia,\na new interpretation of the observed excited bands invoking the K=2 octupole\nvibrations is proposed, which suggests those octupole vibrations may be\nprevalent in SD Hg nuclei.",
"arxiv_id": "nucl-th/9512003",
"authors": [
"Takashi Nakatsukasa",
"Kenichi Matsuyanagi",
"Shoujirou Mizutori",
"Yoshifumi R. Shimizu"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.53.2213",
"journal_ref": "Phys.Rev.C53:2213-2226,1996",
"title": "Microscopic Structure of High-Spin Vibrational Excitations in Superdeformed 190,192,194Hg",
"url": "https://arxiv.org/abs/nucl-th/9512003"
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