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arXiv · 2202.08654

Effects of triaxiality and pairing interaction on fission barriers of actinide nuclei studied by density-dependence relativistic mean-field theory

Taiki Kouno·Chikako Ishizuka·Kazuki Fujio·Tsunenori Inakura·Satoshi Chiba
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Abstract

We employ density-dependent relativistic mean-field theory to study how the triaxiality and pairing interaction affect the inner fission barriers of actinide nuclei. It was found that triaxiality reduced the inner fission barriers and improved agreement with experimental values for many actinides. However, about 1-2 MeV discrepancy to the experimental values still remained for some of the considered nuclei. Such a discrepancy could be made further smaller by increasing the BCS pairing strength parameter. In this work, we demonstrated that adjusting the paring strength was effective to reproduce the experimental inner fission barriers as well as "pairing rotational energy" and binding energy in a consistent manner for nuclei where the effect of the triaxiality on the inner fission barriers was significant.

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Taiki Kouno, Chikako Ishizuka, Kazuki Fujio, Tsunenori Inakura, Satoshi Chiba. 2022-02-17. Effects of triaxiality and pairing interaction on fission barriers of actinide nuclei studied by density-dependence relativistic mean-field theory. https://arxiv.org/abs/2202.08654

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