Abstract:
The Darwin and mass-velocity relativistic corrections have been calculated for all pure vibrational
states of the H2 using the perturbation theory and very accurate variational wave functions obtained
without assuming the Born-Oppenheimer BO approximation. Expansions in terms of explicitly
correlated Gaussians with premultipliers in the form of even powers of the internuclear distance
were used for the wave functions. With the inclusion of the two relativistic corrections to the
non-BO energies the transition energies for the highest states agree more with the experimental
results