Spectroscopic studies of diatomic noble gas halides. II. Analysis of bound-free emission from XeBr, XeI, and KrF

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Abstract
The strong ultraviolet emission bands (’’Spectrum I’’) of XeBr, XeI, and KrF have been photographed following electron‐beam excitation of appropriate noble gas/halide mixtures at moderate to high pressures. These diffuse spectra are analyzed through trial‐and‐error theoretical simulations. The upper‐state vibrational frequencies are estimated to be 120±10, 112±8, and 310±20 cm−1 for XeBr, XeI, and KrF, respectively. The analysis also yields approximate shapes for the lower‐state potential curves in the Franck–Condon region. Lasing is observed in XeBr (2818 Å) and KrF (2484, 2491 Å) but not in XeI.