Dissociation Energy and Ionization Potential of Molecular Hydrogen

The small discrepancy between experimental and theoretical values for the dissociation energies of ${\mathrm{H}}_2$, HD, and ${\mathrm{D}}_2$ has been resolved by new measurements of the ultraviolet absorption limits of these molecules. In addition, the ionization potential of ${\mathrm{H}}_2$ has been more accurately determined from Rydberg series. The agreement between theory and experiment must be considered very satisfactory.