Rare gas—oxygen emission bands and rare gas continua in the UV and VUV

E-beam excitation of rare gas and rare gas—oxygen and/or N2O mixtures has revealed various prominent emission features. In the case of Ar/O2, new emission bands at 185.0 and 204.5 nm have been recorded. Excitation of Kr/O2 and Kr/N2O mixtures leads to a broad continuum and several undulations in the UV. Emission features in XeO have been briefly reexamined. Although no NeO emission bands were observed, Ne emits well into the VUV. The third continuum of Ar at ≈ 191 nm is related at least in part to impurities. In general, the rare gas third continua are not strongly quenched by O2.