摘要
本文应用Ｒｉｔｚ变分法，计算氦原子２ｓ￣２和３ｓ￣２球对称双激发态的能量，从理论上对氦原子在球对称双激发态时有效核电荷数Ｚｅ和屏蔽常数σ值与量子数ｎ的关系作一探讨。
The energy levels of Helium,when it’s in the 2S￣2 adn 3S￣2doubleexcitedstates,have been calculated according to Ritz variational princip le in this paper. Basedon the this result,the values of the effective nuclear number and the shielding constantof He have been studied.
