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- Title
NEW STUDIES ON THE ASPECTS OF NUCLEAR SHAPES.
- Authors
XU, F. R.; LIU, H. L.; SHI, Y.; WANG, H. L.; WALKER, P. M.; FRAUENDORF, S.; PEI, J. C.
- Abstract
Using the pairing-deformation-frequency self-consistent total-Routhian-surface and configuration-constrained potential-energy-surface calculations, we have studied nuclear deformation and its effect on the structure of nuclei. It was found that the high-order multipolarity-six (β6) deformation plays a significant role in superheavy nuclei. Possible non-collective high-spin isomeric states which locate in the second well of actinide nuclei have been investigated with the predictions of excitation energies and configurations. High-spin isomers can extend shape coexistence in A ~190 neutrondeficient nuclei. Triaxiality with γ~30° is found in the ground and excited rotational states of the A ~ 70 germanium isotopes. Octupole correlations have also been discussed in different mass regions. In recent experiments, the textbook nucleus 158Er has been reached at ultrahigh spins around 65ħ . We have studied 158Er ultrahigh-spin states by means of the self-consistent tilted-axis-cranking method based on the Nilsson shell correction and the Skyrme-Hartree-Fock model. The calculation with a γ ≈ 12° triaxial-strongly-deformed (TSD) excited configuration can well reproduce the observed large transitional quadrupole moment. It is demonstrated that the TSD minimum at negative γ deformation which appears in the principal-axis-cranking approach is a saddle point if allowing the rotational axis to change direction.
- Subjects
NUCLEAR shapes; NUCLEAR deformation; ATOMIC nucleus; NUCLEAR structure; QUADRUPOLE moments
- Publication
Acta Physica Polonica B, 2013, Vol 44, Issue 3, p271
- ISSN
0587-4254
- Publication type
Article
- DOI
10.5506/APhysPolB.44.271