Morse potential rotation effect and effective potential for ${{\rm{Li}}}_{2}^{7}$ molecule

The spectra of diatomic molecules contain a large numbers of spectral lines. Morse potential rotation was calculated as a function of bond length and the effective potential was calculated for electronic states molecule. These calculations were computed for rotational quantum number ( J = 5) using Gaydon and Herzberg equations by calculating the dissociation energy. The results show that the potential values using Herzberg equation are more accurate.