Multidimensionally constrained relativistic Hartree-Bogoliubov study of spontaneous nuclear fission

Scientific paper - Original scientific paper

• Author: Jie Zhao
• Author: Bing-Nan Lu
• Author: Tamara Nikšić
• Author: Dario Vretenar
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): fission; nuclear energy density functional
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C - Nuclear Physics
• Numbering: vol. 92, no. 6, 064315
• p-ISSN: 0556-2813
• e-ISSN: 1089-490X
• DOI: https://doi.org/10.1103/PhysRevC.92.064315
• URN:NBN: urn:nbn:hr:217:664482
• Publication: 2015
• Project: Number: IP-2014-09-9159; Title (croatian): Struktura i dinamika egzotičnih femto-sustava; Acronym: STRUDEF; Leader: Nils Paar; Jurisdiction: Croatia; Funding stream: IP
• Document URL: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.92.064315
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2015) by the American Physical Society. Received 22 October 2015; published 18 December 2015.
• Created on: 2020-01-23 17:03:28