期刊
CHINESE PHYSICS C
卷 39, 期 10, 页码 -出版社
CHINESE PHYSICAL SOC
DOI: 10.1088/1674-1137/39/10/104102
关键词
relativistic mean field theory; shell-model-like approach; pairing correlations; particle-number fluctuation
资金
- Fundamental Research Funds for the Central Universities [JUSRP1035]
- National Natural Science Foundation of China [11305077]
Within the relativistic mean field (RMF) theory, the ground state properties of dysprosium isotopes are studied using the shell-model-like approach (SLAP), in which pairing correlations are treated with particle-number conservation, and the Pauli blocking effects are taken into account exactly. For comparison, calculations of the Bardeen-Cooper-Schrieffer (BCS) model with the RMF are also performed. It is found that the RMF+SLAP calculation results, as well as the RMF+BCS ones, reproduce the experimental binding energies and one- and two-neutron separation energies quite well. However, the RMF+BCS calculations give larger pairing energies than those obtained by the RMF+SLAP calculations, in particular for nuclei near the proton and neutron drip lines. This deviation is discussed in terms of the BCS particle-number fluctuation, which leads to the sizable deviation of pairing energies between the RMF+BCS and RMF+SLAP models, where the fluctuation of the particle number is eliminated automatically.
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