2015/07/31 by Jia Jie Li, J. Margueron, Jérôme Margueron +2 · 1 citation
Physics and Astronomy · #Astronomical and nuclear sciences #Geometry #Lorentz transformation #Neutron #Nuclear physics research studies #Pairing #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Shell (structure) #Sign (mathematics) #Tensor (intrinsic definition) #Theoretical physics #nucl-th
paper · pdf · doi:10.1016/j.physletb.2015.12.004
published as Phys. Lett. B 753 (2016) 97-102 · 7 pages, 5 figures, 1 table
openalex publication_date 2015/12/11 · arxiv created 2015/12/15 · openalex created_date 2016/06/24 · arxiv updated 2019/07/31 · openalex updated_date 2026/08/05
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 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.