- 作者: Zhi-Wen Wanga and Xiao-Xu Guanb
- 中文摘要:
aDepartment of Physics, Liaoning Normal University, Dalian 116029, P. R. China
bWuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, P. R. China
The non-relativistic energies of the ground states in the helium-like systems from Z = 2 to 5 are calculated by using three different basis functions, the Slater-type, the ordered coordinates and the modified angular wave functions in which the angular variational parameters are included. In calculations with the latter two types of basis functions, we only used 168 terms in eight l components. The best value of energy for neutral helium atom in this work is obtained by using the modified angular wave functions. It is determined to be -2.9037161 a.u., which is about 0.00017 a.u. lower than that obtained with the 221-term Slater-type expansions. In cases of the helium-like ions from Z = 3 to 5, the comparison of our calculated results using these three types of basis functions indicates that the results obtained with the modified angular wave functions are better than those with the other two types of basis functions. The convergence pattern in energy with the increasing number of terms in the angular partial wave functions is also analyzed. - 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --