中文摘要：

根据参数微扰法理论,选择有效核电荷数为z^＊=2-σ的两个类氢原子的ns态的波函数的组合,作为氦原子基态的1级至4级近似波函数.应用参数微扰法计算了氦原子基态4级近似能量.计算结果表明参数微扰法得到的氦原子基态4级近似能量与实验值的误差为ΔE=0.004922028e_s^2/a_0.

英文摘要：

According to the parameter perturbation theory, a combination of the ns wave functions of two hydrogen-like atoms with effective nuclear charge number of z^＊=2-σ is chosen to be the first order approximation and the fourth order approximation of wave function for the ground state of helium atom. The fourth level approximate energy of the ground state of helium atom is calculated by using the application of perturbation method. The calculation results show that the error of the fourth level approximation energy of helium atomic ground state by the parameter perturbation method is ΔE=0.004922028e_s^2/a_0 comparing with the experiment result.