Spectra of rare gas hydrides

Abstract

The emission of XeH and XeD consists of a number of strong bands in the region 5100-10 000 Å. The strongest band at 9450 Å as well as one other band are of ²Π-²Σ type. In addition two ²Σ-²Σ bands are observed, one of them at 6650 Å has already been reported [2]. All four bands have the same lower ²Σ⁺ state. The analysis of these bands presented no difficulties. Molecular constants derived from the spectra are reported. For XeH they are very similar to those of the XeH⁺ ion recently reported by Rogers, Brazier and Bernath [3]. The spin rotation coupling constant γ for the upper ²Σ state of the 5450 Å band is even larger (relative to B) than for KrH and KrD in the npσ ²Σ states. No hot bands have been observed.