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原子核磁矩是原子核最重要的物理观测量之一,它反映了原子核结构的重要信息,本文回顾了原子核磁矩的理论研究进展,特别是协变密度泛函理论的研究进展,并分别介绍了其对球形奇A核和形变奇A核磁矩的描述.对球形奇A核,首先以~(16)O和~(40)Ca附近具有LS闭壳核芯加减一个核子的奇A原子核磁矩为例,讨论了奇时间场的贡献.其次,基于点耦合相互作用的协变密度泛函理论,并考虑相应的奇时间场、单π介子交换流、一阶和二阶组态混合效应的修正,研究了jj闭壳核~(208)Pb附近原子核~(209)Pb,~(207)Pb,~(209)Bi和~(207)T1的磁矩.对于形变奇A原子核,以~(33)Mg为例,利用包含时间分量的相对论平均场理论和组态固定的形变约束方法,研究其内禀磁矩.最后,对原子核磁矩的协变密度泛函理论研究进行了展望.
Nuclear magnetic moment is one of the most important physical observations of the nucleus. It reflects the important information of nuclear structure. This paper reviews the theoretical research progress of nuclear magnetic moment, especially the research progress of covariant density functional theory, A description of the spherical odd A-nuclei and the deformed odd-A nuclear magnetic moments is given. For a spherical odd A-core, an odd atomic nucleus of a nucleus is first added and subtracted from the closed-core of LS with ~ (16) O and ~ (40) Moment as an example, the contribution of odd-time field is discussed.Secondly, based on the covariant-density functional theory of point-coupling interaction and the corresponding odd-time field, single-pion exchange flow, first- and second- , The magnetic moment of ~ (209) Pb, ~ (207) Pb, ~ (209) Bi and ~ (207) T1 nuclei in ~ (208) ~ (33) Mg as an example, the intrinsic magnetic moment is studied by using the relativistic mean field theory with time component and the configurational fixed deformation constraint method.Finally, the prospect of covariance density functional theory .