摘要: 简要介绍了目前有关非稳定核^9He的实验和理论研究现状．现代壳模型理论计算表明。He的基态自旋宇称为1／2^+，而不是1／2^-，即存在自旋宇称翻转现象．到目前为止，实验上虽然观测到了^9He的几个共振态，但还不能确认其基态的能量和自旋宇称值．利用新的实验技术——逆运动学弹性共振散射，对^9He核进行研究，给出了共振态的自旋宇称可能的取值范围．在ISOL型次级束装置上的实验有望能给出^9He核能级的精确测量．The status of theoretical and experimental investigations on unbound nucleus()~(9)He is briefly introduced. The results of modern shell model suggest that the ground state of~(9)He should be 1/2~(+) instead of 1/2~(- )as expected by the normal shell ordering. Therefore, it means that the parity inversion which was well known in~(11)Be occurs also in~(9)He ground state. Recently, some resonance states were observed in transfer reactions and final-state reaction, but their spin-parities cannot be exact...