Rare gas and rare gas-oxygen mixtures have been excited with e-beams, leading to new emission features in the ultraviolet. Strong new emission bands are observed at 185.0 and 204.5 nm in the case of Ar/O2 mixtures. Time dependence measurements of these Ar/oxygen bands suggest that they either have a common origin or a common precursor. New emission features arising from the interaction of Kr and oxygen have also been recorded following excitation of Kr/O2 and Kr/N2O mixtures.
Daniel E. Johnson,
"Rare gas-oxygen emission bands in the ultraviolet", Proc. SPIE 2380, UV and Visible Lasers and Laser Crystal Growth, (17 April 1995); doi: 10.1117/12.206951; https://doi.org/10.1117/12.206951