Spin-orbit term in the nuclear shell model
Spin-orbit term in the nuclear shell model
复制标题
DOI：
10.1103/physrevc.103.024306
复制
发表时间：
2021-02
影响因子：
3.1
通讯作者：
H. Müther
中科院分区：
文献类型：
--
作者：
H. Müther
本文研究了准核系统，即具有可变尺寸的原子核，研究了从无限核物质到有限核跃迁过程中核平均场中自旋轨道项的出现。相对论以及nonrelativistic平均场计算模型的基础上的核子-核子（NN）的相互作用，适合NN散射数据，被认为是。自旋轨道项的强度和核系统的半径之间有很强的相关性。通过考察NN相互作用的单玻色子交换模型中不同分波和不同介子的贡献，分析了自旋轨道项的来源。本文还讨论了一个基于手征有效场论的真实相互作用模型的结果，该模型考虑了三核子相互作用的贡献。讨论了关联效应的影响和核子狄拉克旋量小分量的增强。
Quasinuclear systems, representing nuclei with variable size, are studied to investigate the occurrence of the spin-orbit term in the nuclear mean field in the transition from infinite nuclear matter to finite nuclei. Relativistic as well as nonrelativistic mean-field calculations based on models for the nucleon-nucleon (NN) interaction, which fit the NN scattering data, are considered. A very strong correlation between the strength of the spin-orbit term and radius of the nuclear system is observed. The origin of the spin-orbit term is analyzed by inspecting the contributions of the different partial waves and various mesons in a one-boson-exchange model of the NN interaction. Also results for a realistic interaction model based on chiral effective field theory including the contribution of three-nucleon interactions are discussed. The influence of correlation effects and the enhancement of the small component of Dirac spinors for nucleons in the nuclear medium are discussed.