Theoretical calculations of the Rydberg spectra of ArH

A series of multireference (MRD-CI) calculations are presented for the electronic states of ArH correlating with the atomic limits up to Ar(1S) + H* (n = 3), in order to provide transition energies corresponding to the possible Rydberg spectra of ArH. The computed transition energies for several 2Π → A 2∑+ transitions are found to be in good agreement with experimental T 0 values, with discrepancies that in every case are smaller than 0·1 eV.