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- Title
Pairing strength in the relativistic mean-field theory determined from the fission barrier heights of actinide nuclei and verified by pairing rotation and binding energies.
- Authors
Kouno, Taiki; Ishizuka, Chikako; Inakura, Tsunenori; Chiba, Satoshi
- Abstract
We have studied the strength of the Bardeen–Cooper–Schrieffer (BCS) pairing force, used as a residual interaction to the relativistic mean-field approach, to reproduce the height of the inner fission barriers for actinide nuclei. It was found that increasing the pairing strength by about |$13\%$| makes the reproduction of the inner fission barriers better over a wide range of actinide nuclei. This result was verified by using the moment of inertia of the pairing rotational energy, which was introduced to avoid mean-field and odd-mass effects in the pairing interaction, to deduce purely the pairing strength. The pairing interaction thus determined could also improve the description of the binding energy of heavy nuclei. As a result, a consistent picture among inner fission barrier, binding energy, and pairing moment of inertia could be obtained in terms of the relativistic mean-field + BCS theory for a broad region of the actinide nuclei.
- Subjects
RELATIVISTIC mechanics; MEAN field theory; ACTINIDE elements; BINDING energy; BCS theory (Superconductivity)
- Publication
Progress of Theoretical & Experimental Physics: PTEP, 2022, Vol 2022, Issue 2, p1
- ISSN
2050-3911
- Publication type
Article
- DOI
10.1093/ptep/ptab167