The study of the approximate wave function of the ground state of H_2

In order to inspect the reliability level of the approximate wave function in molecular physics,we calculated the approximate wave function and the potential energy of the ground state of H2+.We studied the effect of approximate wave function of ground state of H2+ on its potential energy.We got accurate equilibrium position by comparing with RKR potential when z=1.23,but on higher vibrational levels z=1.16 is very well.