The True Potential Energy Curves of the Excited States of LiH and RbH Molecules

The true potential energy curves of the excited states of LiH and RbH molecules have been obtained by the Rydberg-Klein-Rees method. An analytical method has been developed for evaluating the phase integral. On the application of this method to a number of vibrational levels, it has been observed that the true potential energy curves satisfy the quantization condition very well. In the case of RbH, the phase integrals have been evaluated by a graphical method as well.