Determination of the Singlet-Triplet Separation of H2 by a "Level-Anticrossing" Technique

R. Jost (1) , M. Lombardi (1)

1 LSP - Laboratoire de Spectrométrie Physique

We show that the singlet-triplet separation of H2 must be lowered by 157.7 +/- 0.2 cm-1 compared to the hitherto accepted value of Dieke. We have used a new kind of "level anticrossing" method in which the anticrossing is due to the coupling of a singlet and a triplet state by spin-orbit or hyperfine Fermi contact interaction.

Domaines: Physique Quantique [quant-ph]

R. Jost, M. Lombardi. Determination of the Singlet-Triplet Separation of H2 by a "Level-Anticrossing" Technique. Physical Review Letters, 1974, 33, pp.53-56. ⟨10.1103/PHYSREVLETT.33.53⟩. ⟨hal-00974331⟩