https://doi.org/10.1140/epjp/s13360-022-03128-1
Regular Article
Research on the exotic properties of nuclei from the light to medium mass region
1
School of Management Science and Engineering, Anhui University of Finance and Economics, 233030, Bengbu, China
2
School of Physics and Optoelectronics Engineering, Anhui University, 230601, Hefei, China
Received:
5
June
2022
Accepted:
29
July
2022
Published online:
9
August
2022
The relativistic point-coupling model combined with complex momentum representation method (RMFPC-CMR method) is used to investigate the exotic phenomena in the neutron-rich Si, S, Ar, Ti, Cr, and Fe isotopes. The calculated two-neutron separation energies are compared with the relativistic Hartree–Bogoliubov calculations as well as the available experimental data. It is found that the new magic number 
appears in Si and S isotopes and the traditional magic numbers 
(in Si isotopes) and 50 (in Si, S, Ar, and Ti isotopes) disappear. In addition, the calculated single-particle energies and occupation probabilities of the bound and resonant states support the results and indicate that a neutron halo may occur on the neutron-rich side of Ti, Cr, and Fe isotopes. We also calculate the density distributions of neutrons and protons, and the ratios of the densities of the single-particle levels to the total neutron density. The results show that 
Ti (
), 
Cr (
), and 
Fe () isotopes are possible halo nuclei, while Si, S, and Ar isotopes prefer to neutron skin. The prediction on the structure of halo and skin in the neutron-rich Si, S, Ar, Ti, Cr, and Fe isotopes are of referential value for experiment.
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