奇特原子核电荷半径的理论研究进展  

Theoretical research on charge radii in exotic nuclei

作　　者：安荣 曹李刚[1,2] 张丰收 AN Rong;CAO Ligang;ZHANG Fengshou(Key Laboratory of Beam Technology of Ministry of Education,Institute of Radiation Technology,Beijing Academy of Science and Technology,100875,Beijing,China;College of Nuclear Science and Technology,Beijing Normal University,100875,Beijing,China;Center of Theoretical Nuclar Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,70000,Lanzhou,Gansu,China)

机构地区：[1]射线束技术教育部重点实验室,北京市科学技术研究院,辐射技术研究所,北京100875 [2]北京师范大学核科学与技术学院,北京100875 [3]兰州重离子加速器国家实验室原子核理论研究中心,甘肃兰州730000

出　　处：《北京师范大学学报（自然科学版）》2022年第5期790-795,共6页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(12135004,11635003,11961141004,11975096,12047513);中央高校基本科研业务费专项资助项目(2020NTST06);北京市科学技术研究院改革与发展专项资助项目(13001-2110,13001-2116)。

摘　　要：电荷半径是描述原子核基本性质的可观测量之一,对于奇特原子核电荷半径的精确描述是核物理实验和理论研究的前沿课题.影响原子核电荷半径大小的因素有很多,例如形变、对关联、壳闭合效应等,因此需要发展一个统一的理论模型.对于奇特原子核电荷半径的精确描述,一方面可以更深层次地揭示核子-核子有效相互作用,对理论模型参数进行约束;另一方面,可靠的电荷半径数值作为输入参量,对核天体演化研究具有重要意义.本文简要介绍关于奇特原子核电荷半径的理论研究进展,分析了不同理论模型对电荷半径的壳效应和奇偶效应的描述;结合Ca和Rb同位素链电荷半径的变化趋势,分析指出中子-质子关联和自旋-轨道相互作用在精确描述原子核电荷半径中起到了很重要的作用.Charge radii are fundamental properties in describing atomic nuclei. Precise determination of charge radii of exotic nuclei can be influenced, for example, by shape deformation, pairing correlation, and shell closure effect. Therefore it is important to develop a unified theoretical model. Available descriptions of charge radii can disclose effective nucleon-nucleon interactions and make constraints on theoretical parameterization sets. Reliable data of nuclear charge radii serve as inputs in astrophysics study. This paper reviews recent progress of theoretical research regarding charge radii in exotic nuclei. The source of shell closures and odd-even staggering in charge radii are analyzed through various theoretical models. Trends in systematic change of charge radii along Ca and Rb isotopic chains are used as examples to emphasize that neutron-proton correlations and spin-orbit interactions play an important role in describing charge radii of exotic nuclei.

关 键 词：相对论平均场理论 电荷半径 壳效应 奇偶效应 对关联 

分 类 号：O571[理学—粒子物理与原子核物理]