Microscopic analysis of the octupole phase transition in Th isotopes

Nomura, Kosuke and Vretenar, Dario and Lu, Bing-nan (2013) Microscopic analysis of the octupole phase transition in Th isotopes. Physical Review C, 88 (2). 21303(R)-5. ISSN 0556-2813

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Abstract

A shape phase transition between stable octupole deformation and octupole vibrations in Th nuclei is analyzed in a microscopic framework based on nuclear density functional theory. The relativistic density dependent point coupling (DD-PC1) functional is used to calculate axially symmetric quadrupole-octupole constrained energy surfaces. Observables related to order parameters are computed using an interacting-boson Hamiltonian, with parameters determined by mapping the microscopic energy surfaces to the expectation value of the Hamiltonian in the boson condensate. The systematics of constrained energy surfaces and low-energy excitation spectra point to the occurrence of a phase transition between octupole-deformed shapes and shapes characterized by octupole-soft potentials.

Item Type: Article
Keywords: octupole phase transition, interacting boson-fermion model, actinides
Date: August 2013
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2013) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 26 Aug 2014 12:42
Last Modified: 23 Feb 2016 15:21
URI: http://digre.pmf.unizg.hr/id/eprint/2190

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