A^80核区在束γ谱学研究进展

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

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.