摘要
The Feshbach-Rubinow approximation and its improved versions have been appfied to the H＋ ion system. The ground-state energies are caJculated with these different methods. The best ground-state energy obtained is only 2% higher than the experimental result. Given the simplicity of the method, this accuracy is quite remarkable. It is shown that the screening effect plays a less significant role and the effective potential between the two protons is probably of most importance in this problem.
基金
Supported by the National Natural Science Foundation of China under Grant Nos. 10735010,10975072,and 11035001
by the 973 National Major State Basic Research and Development of China under Grant Nos. 2007CB815004 and 2010CB327803
