Theoretical Nuclear Physics——Isospin Splitting of Neutron and Proton Effective .Masses in Neutron-rich Nuclear Matter

• 作者: Cao Ligang Li Baoan U. Lombardo Zuo Wei
• 来源期刊: 近代物理研究所和兰州重离子加速器实验室年报：英文版
• 学科: 物理学
• 关键词: 丰中子 同位旋 核物质 理论核物理 质子 生效 劈裂 有效质量
• 年，卷（期）: 2005,（1）
• 页码范围: 1
• 页数: 3页
• 分类号: O572

摘要

<正>We investigate the isospin splitting of neutron and proton effective masses in neutron-rich nuclear matter by using Brueckner-Hartree-Fock (BHF) approach and the extended BHF (EBHF) approach including the ground state correlation contributions. The realistic nucleon-nucleon interaction adopted in our calculation is the Argonne V18 two-body force supplemented with a microscopic three-body force constructed from the meson-exchange current approach. The result is reported in Fig. 1 where the neutron and proton effective masses are plotted as functions of isospin asymmetry parameterβ. It is shown that in both cases by adopting the BHF and EBHF approaches, the predicted neutron effective mass is greater than