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

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• 作者：Jia Jie Li^a ; ^b ; ^c ; ^{j.li@ipnl.in2p3.fr" class="auth_mail" title="E-mail the corresponding author} ; Jé ; rô ; me Margueron^b ; Wen Hui Long^a ; ^d ; Nguyen Van Giai^c
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 February 2016
• 年：2016
• 卷：753
• 期：Complete
• 页码：97-102
• 全文大小：520 K

文摘

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$N=16$, 32 and 34 shell gaps. The nuclei ²⁴O, ⁴⁸Si and ^52,54Ca are predicted with a large shell gap and zero (²⁴O, ⁵²Ca) or almost zero (⁴⁸Si, ⁵⁴Ca) 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.