NON-ADIABATIC ENERGIES OF THE HYDROGEN MOLECULE

Abstract

A novel perturbation theory has been developed to account for nonadiabatic effects in diatomic molecules, 164113 (2009)}. All molecular levels can be obtained simultanously from a single nuclear equation corrected for the presence of $(m/M)^2$ terms. Comparison with the direct nonadiabatic calculations for rotationless states of H$_2$ demonstrates an agreement at the level of $10^{-5}$ cm$^{-1}$ for the ground tone transition.