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
Authors :	Name Email ORCID Xu, FR Liu, HL Wang, HL Pei, JC Shi, Y Walker, PM Frauendorf, S
Date :	March 2013
DOI :	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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