Magicity of neutron-rich nuclei within relativistic self-consistent approaches

作者：Li, Jia Jie^*; Margueron, Jeorme; Long, Wen Hui; Nguyen Van Giai

来源：Physics Letters B, 2016, 753: 97-102.

DOI：10.1016/j.physletb.2015.12.004

• HARTREE-BOGOLIUBOV THEORY
• MEAN-FIELD
• EVOLUTION
• FORCES
• NUMBER

The formation of new shell gaps in intermediate mass neutron-rich nuclei is investigated within the relativistic Hartree-Fock-Bogoliubov theory, and the role of the Lorentz pseudo-vector and tensor interactions is analyzed. Based on the Foldy-Wouthuysen transformation, we discuss in detail the role played by the different terms of the Lorentz pseudo-vector and tensor interactions in the appearing of the N=16, 32 and 34 shell gaps. The nuclei O-24, Si-48 and Ca-52,Ca-54 are predicted with a large shell gap and zero (O-24, Ca-52) or almost zero (Si-48, Ca-54) pairing gap, making them candidates for new magic numbers in exotic nuclei. We find from our analysis that the Lorentz pseudo-vector and tensor interactions induce very specific evolutions of single-particle energies, which could clearly sign their presence and reveal the need for relativistic approaches with exchange interactions.

• 出版日期2016-2-10
• 单位兰州大学