15min:
NON-ADIABATIC ENERGIES OF THE HYDROGEN MOLECULE.

KRZYSZTOF PACHUCKI, Faculty of Physics, University of Warsaw, Ho\.za 69, 00-681 Warsaw, Poland; JACEK KOMASA, Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland.

A novel perturbation theory has been developed to account for nonadiabatic effects in diatomic molecules. 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 H2 demonstrates an agreement at the level of 10-5 cm-1 for the ground tone transition.