用一个高度的近似模型计算氦原子和类氦离子的基态能量,给出了形式简洁、精度较高的双电子原子基态能量公式E0=-1/2Z^2-1/2(Z-2/π)^2和电离能公式E1=1/2(Z-1/π)^2
The ground state energys of the helium atom and quasi--heliumion are calculated by use of an approximation model. The expressions for ealculeting the ground state energys and ionization energy of two--electron atoms are given ,which are ,very precise and concise.