Microscopic structure of high-spin vibrational excitations in superdeformed {sup 190,192,194}Hg
- Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, Ontario K0J 1J0 (Canada)
- Department of Physics, Kyoto University, Kyoto 606--01 (Japan)
- Department of Mathematical Physics, Lund Institute of Technology, Box 118, S-22100, Lund (Sweden)
- Department of Physics, Kyushu University, Fukuoka 812 (Japan)
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 {sup 190}Hg, {sup 192}Hg, and {sup 194}Hg. The {ital 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 {sup 190}Hg, is crossed by the aligned two-quasiparticle bands in {sup 192}Hg, and retains the {ital K}=2 octupole vibrational character up to the highest frequency in {sup 194}Hg. 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 {ital K}=2 octupole vibrations is proposed, which suggests those octupole vibrations may be prevalent in superdeformed Hg nuclei. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 283958
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 53; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spin alignment in superdeformed Hg nuclei
Collective and quasiparticle excitations in superdeformed {sup 190}Hg