New studies on the aspects of nuclear shapes
Xu, FR, Liu, HL, Wang, HL, Pei, JC, Shi, Y, Walker, PM and Frauendorf, S (2013) New studies on the aspects of nuclear shapes Acta Physica Polonica B, 44 (3). pp. 271-282.
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Abstract
Using the pairing-deformation-frequency self-consistent total-Routhiansurface 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 highspin 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 65∼. 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 ≈ 12 ° triaxialstrongly-deformed (TSD) excited configuration can well reproduce the observed large transitional quadrupole moment. It is demonstrated that the TSD minimum at negative γdeformation which appears in the principalaxis-cranking approach is a saddle point if allowing the rotational axis to change direction.
Item Type: | Article | ||||||||||||||||||||||||
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Date : | March 2013 | ||||||||||||||||||||||||
Identification Number : | 10.5506/APhysPolB.44.271 | ||||||||||||||||||||||||
Depositing User : | Symplectic Elements | ||||||||||||||||||||||||
Date Deposited : | 28 Mar 2017 13:48 | ||||||||||||||||||||||||
Last Modified : | 31 Oct 2017 15:05 | ||||||||||||||||||||||||
URI: | http://epubs.surrey.ac.uk/id/eprint/772708 |
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