Interatomic potentials of the C1 and D+ states of XeNe, XeAr, and XeKr as studied by tunable vacuum ultraviolet laser spectroscopy

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Abstract
Fluorescence excitation and resonantly enhanced photoionization spectra of the C–X and D–X bands of XeNe, XeAr, and XeKr, formed in a supersonic free jet are measured by use of a tunable vacuum ultraviolet light generated by four‐wave difference frequency mixing of two lasers in Kr. The potential parameters of the heteronuclear rare gas dimers for the two excited state potentials, C1 and D0+, correlated with the Xe6s’(1/2)1 state are derived by an analysis of rovibronic structures of the C–X and D–X bands. The dissociation energies De for the C and D states are, respectively, determined to be 244 and 112 cm−1 for XeAr and are 1445 and 54 cm−1 for XeKr.