Particle-number fluctuation of pairing correlations for Dy isotopes
Particle-number fluctuation of pairing correlations for Dy isotopes
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Dy 同位素配对相关性的粒子数波动
DOI：
10.1088/1674-1137/39/10/104102
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发表时间：
2015
影响因子：
3.6
通讯作者：
ZHANG Yi-Xin
中科院分区：
文献类型：
--
作者：
CHENG Ming-Jian;LIU Lang;ZHANG Yi-Xin
在相对论平均场（RMF）理论框架下，采用类壳模型方法（SSTH）研究了镝同位素的基态性质，该方法严格考虑了Pauli阻塞效应，对关联进行了粒子数守恒处理.为了比较，还进行了Bardeen-Cooper-Schrieffer（BCS）模型与RMF的计算。计算结果表明，RMF+ Score和RMF+BCS的计算结果都能很好地再现实验结合能和单、双中子分离能。然而，RMF+BCS计算得到更大的配对能量比RMF+ SCRESS计算得到的，特别是对于质子和中子滴线附近的核。这种偏差被讨论的BCS粒子数的波动，这导致了相当大的偏差之间的配对能量的RMF+BCS和RMF+ SCRESS模型，其中粒子数的波动被自动消除。
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.
DOI：
10.1142/9789812777072_0010
发表时间：
2002
期刊：
--
影响因子：
--
作者：
S. Fantoni
通讯作者：
S. Fantoni