Adiabatic Dissociation Energies for the Ground States of the H2, HD, and D2 Molecules

Variational adiabatic potential curves for the ground state X 1Σg of these molecules were constructed from the adiabatic coupling corrections computed by Kol/os and Wolniewicz. Energy eigenvalues of these variational potentials were computed. The derived dissociation energies are still larger than those inferred from the spectra of the molecules. It is suggested that the resolution of this discrepancy is more likely to be found in a reinterpretation of the experimental data than through any refinement of theoretical calculations.