A^80核区在束γ谱学研究进展  

Progress on the γ Spectroscopy in the A^80 Mass Region

作　　者：王守宇[1] 许文政 刘晨[1] 李志泉 WANG Shouyu;XU Wenzheng;LIU Chen;LI Zhiquan(Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,School of Space Science and Physics,Institute of Space Sciences,Shandong University,Weihai 264209,Shandong,China)

机构地区：[1]山东大学山东省光学天文与日地空间环境重点实验室,空间科学与物理学院,空间科学研究院,山东威海264209

出　　处：《原子核物理评论》2020年第1期11-17,共7页Nuclear Physics Review

基　　金：山东省自然科学基金资助项目(JQ201701)。

摘　　要：为深入研究原子核手征对称性自发破缺等重要的科学问题,山东大学(威海)核物理研究团队利用在束γ谱学实验技术,系统研究了A^80核区一系列原子核的能级结构,丰富了这个区域原子核的谱学信息,并对这些原子核的对称性、形状和运动模式等问题进行了探讨。研究结果表明,在A^80核区存在包括奇奇核和奇A核在内的多例候选手性原子核,能级寿命测量支持80Br的手性解释。此外,本文也讨论了随着中子数的增加,手征几何和八极关联效应的演化情况以及这个核区近球形核的中子跨壳激发现象。In order to further explore important scientific issues such as spontaneous breaking of chiral symmetry in the A^80 mass region, the nuclear physics group of Shandong University at Weihai has studied excited states of nuclei in this region by in-beam gamma spectroscopy techniques. The level schemes of these nuclei were expanded.The symmetry, shape, and motion mode of these nuclei were systematically studied with respect to experiments and theories. According to experimental results, several chiral candidates including odd-odd and odd-A nuclei were found in the A^80 mass region, and chirality in the 80 Br nuclei was confirmed by the lifetime measurements. In addition, the present work also discussed the evolution of chiral geometry and octupole correlations with increasing neutrons, and the systematic features of neutron-core excitations in near-spherical nuclei in the A^80 mass region.

关 键 词：原子核 手征对称性 寿命测量 八极关联 跨壳激发 

分 类 号：O572.211[理学—粒子物理与原子核物理]