[2A10-15] Nuclear Reaction Theory

[2A13] Effect of triaxiality and pairing interaction for fission barrier using density-dependent relativistic mean-field theory

*Taiki Kouno¹, Chikako Ishizuka¹, Tsunenori Inakura¹, Satoshi Chiba¹ (1. Tokyo Tech)

Keywords:Nuclear data, Relativistic mean-field theory, Fission barrier, Actinide, Triaxiality, Pairing Correlation

Theoretical prediction of the fission barriers suffers from errors of the order of about a few MeV. Many theoretical predictions assume axial symmetry that reduces computational costs, and it has been confirmed that it is effective to adjust the pairing strength. However, it has been reported that when triaxial asymmetry is imposed in a few relativistic mean-field theories, predictions are improved by about 2 MeV compared with calculations assuming axial symmetry. In this study, we used density-dependent relativistic mean-field theory to calculate fission barriers assuming both axial symmetry and triaxiality. In this presentation, we will describe the results obtained with these symmetries. In addition, it will be described that adjustment by the pairing strength is necessary because there are some nuclides in which an error of about 2 MeV occurs even in the calculation including triaxiality.