中文摘要：

考虑类氦原子中电子对核的屏蔽效应，建立含有屏蔽效应参数的哈密顿算符，并作变换使得哈密顿算符中微扰项势能算符满足微扰法条件。通过参数微扰法计算类氦原子二级近似基态能量和有效核电荷，结果表明参数微扰法得到的类氦原子基态能量非常接近实验值。参数微扰法为研究多电子原子能级和原子能级精细结构提供了一种新的方法。

英文摘要：

The Hamiltonian containing shielding effect parameters was established by considering the helium-like atom electron nuclear shielding effect and transformation was made to allow perturbation potential operator in Hamiltonian to meet the conditions of perturbation method .The second order approximation of ground state energy of Helium-like atom and effective nuclear charge was calculated by parameter perturbation method .The results show that the ground state energy calculated is quite close to the experimental value .It indicates that parameter perturbation provides us a new approach to study the multi-electron atomic levels and the fine structure of atomic levels .