An analytical potential function of stable diatomic molecules

We propose an analytical potential function of stable diatomic molecules V(x) = K/x(m) - be(-tx) [1 + g(1) (x - 1) + g(2) (x - 1)(2)] where x = r/r(e), r being the internuclear distance and r(e) the equilibrium bond length. K, b, t, g(1) and g(2) determine the parameters of the function which are obtained from molecular spectroscopic data in terms of known molecular constants. Parameter m has a constant value equal to 3 for all molecules. Comparative study of the potential curve calculations of our function with those of the Hulburt-Hirschfelder function and the RKR data have been made for 15 molecular states.