Energy density functional analysis of the fission properties of 240 Pu: The effect of pairing correlations

Abstract We have calculated the potential energy surfaces for 240 Pu up to the scission point using the density functional theory with different pairing strengths to investigate the effect of pairing correlations on its fission properties. An enhancement in the pairing correlations lowers the barrie...

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Published inChinese physics C Vol. 46; no. 2; p. 24103
Main Authors Chen, Yong-Jing, Su, Yang, Dong, Guoxiang, Liu, Li-Le, Ge, Zhigang, Wang, Xiaobao
Format Journal Article
LanguageEnglish
Published 01.02.2022
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Summary:Abstract We have calculated the potential energy surfaces for 240 Pu up to the scission point using the density functional theory with different pairing strengths to investigate the effect of pairing correlations on its fission properties. An enhancement in the pairing correlations lowers the barrier heights, isomeric state, and ridge between the symmetric and asymmetric fission valleys significantly. Moreover, it weakens the microscopic shell structure around the Fermi surface, shrinks the scission frontiers, especially for the symmetric and very asymmetric fission regions, and lifts the total kinetic energies (TKEs) for the symmetric fission region. It is also emphasized that the microscopic calculation qualitatively reproduces the trend of the distribution of the measured TKEs, especially for the positions of the peaks at and .
ISSN:1674-1137
2058-6132
DOI:10.1088/1674-1137/ac347a