THE RYDBERG SPECTRUM OF ARH AND KRH - CALCULATION BY R-MATRIX AND GENERALIZED QUANTUM-DEFECT THEORY

The generalized ligand field approach developed recently by Arif and o thers for the description of the electronic structures of the alkaline earth halides is used to calculate the electronic spectrum of ArH and of KrH from the ground state up near the ionization limit. The ion co re is represented as a closed-shell protonated rare gas atom from whic h the lone electron is scattered. The resulting level energies (effect ive principal quantum numbers) are in good agreement with the availabl e experimental data and constitute the first global theoretical calcul ation of the electronic spectra of ArH and KrH. Polarization of the ra re gas atom by the ligand proton is shown to be significant.