Multidimensionally constrained relativistic Hartree-Bogoliubov study of spontaneous nuclear fission

Zhao, Jie and Lu, Bing-Nan and Nikšić, Tamara and Vretenar, Dario (2015) Multidimensionally constrained relativistic Hartree-Bogoliubov study of spontaneous nuclear fission. Physical Review C, 92 (6). pp. 64315-12. ISSN 0556-2813

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The inclusion of nonaxial quadrupole and octupole shape degrees of freedom is essential for a quantitative analysis of fission dynamics. The action integrals and, consequently, the half-lives crucially depend on the approximation used to calculate the effective collective inertia along the fission path. The perturbative cranking approach underestimates the effects of structural changes at the level crossings and the resulting collective inertia varies relatively smoothly in the (β20,β22) and (β20,β30) planes. In contrast, the nonperturbative collective mass is characterized by the occurrence of sharp peaks on the surface of collective coordinates, that can be related to single-particle level crossings near the Fermi surface. This enhances the effective inertia, increases the values of the action integral, and results in longer fission half-lives.

Item Type: Article
Date: 18 December 2015
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2015) by the American Physical Society. Received 22 October 2015; published 18 December 2015.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 03 Feb 2016 13:12
Last Modified: 30 Nov 2017 11:05

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