Spectroscopy and Isospin Symmetry Studies of Exotic Neutron Deficient Nuclei

奇异缺中子核的能谱学和同位旋对称性研究

• 批准号: 1802203
• 金额: --
• 依托单位: University of York
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1802203
• 关键词: Spectroscopy; Isospin; Symmetry; Studies; Exotic

The aim of this project is to use York's developed expertise in knockout methodology to explore different nuclear shapes and to subsequently analyse neutron-proton correlations along the line of nuclei with equal numbers of protons and neutrons (N=Z), such as 80Zr. The data for this experiment will be obtained at the Michigan State University at the National Superconducting Cyclotron Laboratory using a primary beam of 92Mo, followed by a 1n knockout of the secondary 81Zr beam. The lifetime of the 2+ states of 80Zr will be measured along with the lifetime of the 2+ state of the neighbouring N=Z nuclei 78Y. Measurements of these lifetimes will be used to probe isoscalar (T=0) np pairing correlations along this N=Z line. This data will also mean that NSCL will have obtained lifetimes of the 2+ states of all N=Z nuclei from 64Ge to 80Zr, with the exception of 66As. If possible, highly exotic proton-rich systems near A=100 will also be explored for the first time using a new spectrometer at the University of Jyvaskyla, Finland. This will allow further investigation into the fundamental differences between nn and pp interactions through the comparison of mirror nuclei, in particular through mirror energy differences.

该项目的目的是利用约克在敲除方法方面的成熟专业知识来探索不同的核形状，并随后分析沿着质子和中子数相等（N=Z）的核线（如80 Zr）的中子-质子相关性。该实验的数据将在密歇根州立大学的国家超导回旋加速器实验室获得，使用92 Mo的初级束，然后是次级81 Zr束的1 n敲除。80 Zr的2+态的寿命将与相邻N=Z核78 Y的2+态的寿命一起沿着测量。这些寿命的测量将被用来探测沿着这条N=Z线沿着的等密度（T=0）np配对相关性。这些数据也意味着NSCL将获得从64 Ge到80 Zr的所有N=Z核的2+态的寿命，除了66 As。如果可能的话，还将首次使用芬兰伊瓦斯基拉大学的新光谱仪探索A=100附近的高度奇异的富质子系统。这将允许通过镜像核的比较，特别是通过镜像能量差异，进一步研究nn和pp相互作用之间的根本差异。