Об одной из причин ограниченной применимости потенциала Морзе

<jats:p>This work discusses the relationship between the fundamental parameters, namely the frequency of harmonic vibrations ω, the anharmonicity parameter x, and the dissociation energy D for hydrogen molecules and its isotopes H₂, D₂, T₂, HD, HT, and DT. It is shown that for these molecules, the parameters calculated on the basis of the Morse potential are in high agreement with experimental data. The largest deviation of the results is observed for the H₂ molecule. The characteristics of these deviations make it possible to conclude that they arise due to a violation of adiabaticity, which is not considered in the Morse potential.</jats:p>