Abstract：The concept of symmetry plan of electron spin space was put forward in this paper.The problems on eigen
state of electron spin and average value of spin angular momentum projection and also on the problem of
phase factor of the spin-state were analyzed and discussed
陈子栋 1,戴长建 2,金烈侯 1. 自旋空间的对称面及自旋态的相因子[J]. 浙江大学学报（理学版）, 2000, 27(5): 508-510.
CHEN Zi-dong 1,DAI Chang-jian 2,JIN Lie-hou 1. On symmetry plan of electron spin space and phase factor of the spin-state .. Journal of ZheJIang University(Science Edition), 2000, 27(5): 508-510.