Parametrizations of triaxial deformation and E2 transitions of the wobbling band
- Department of Physics, Graduate School of Sciences, Kyushu University, Fukuoka 812-8581 (Japan)
- Department of Physics, Fukuoka University of Education, Munakata, Fukuoka 811-4192 (Japan)
There are various different definitions for the triaxial deformation parameter '{gamma}'. It is pointed out that the parameter conventionally used in the Nilsson (or Woods-Saxon) potential, {gamma}(pot:Nils) [or {gamma}(pot:WS)], is not appropriate for representing the triaxiality {gamma} defined in terms of the intrinsic quadrupole moments. The difference between the two can be as large as a factor two in the case of the triaxial superdeformed bands recently observed in Hf and Lu nuclei, i.e., {gamma}(pot:Nils){approx_equal}20 deg. corresponds to {gamma}{approx_equal}10 deg. In our previous work, we studied the wobbling excitations in Lu nuclei using the microscopic framework of the cranked Nilsson mean-field and the random phase approximation. The most serious problem was that the calculated B(E2) value is about factor two too small. It is shown that the origin of this underestimate can mainly be attributed to the small triaxial deformation parameter {gamma}{approx_equal}10 deg. that corresponds to {gamma}(pot:Nils){approx_equal}20 deg. If the same triaxial deformation parameter is used as in the analysis of the particle-rotor model, {gamma}{approx_equal}20 deg., the calculated B(E2) gives correct magnitude of the experimental data.
- OSTI ID:
- 21068124
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 77, Issue 2; Other Information: DOI: 10.1103/PhysRevC.77.024319; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
The triaxial particle plus rotor model and wobbling mode: A semiclassical view
Evidence for octupole vibration in the triaxial superdeformed well of {sup 164}Lu
Related Subjects
E2-TRANSITIONS
EXCITATION
HAFNIUM ISOTOPES
LUTETIUM ISOTOPES
MEAN-FIELD THEORY
NILSSON-MOTTELSON MODEL
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
PARTICLE-CORE COUPLING MODEL
QUADRUPOLE MOMENTS
RANDOM PHASE APPROXIMATION
RARE EARTH NUCLEI
SUPERDEFORMED NUCLEI
WOODS-SAXON POTENTIAL