A report is given of generation of laser radiation in the vacuum region by the excitation of condensed inert gases with an electron beam. Laser emission was achieved experimentally at λ = 1760 Å by the excitation of liquid xenon with a beam of 800 keV electrons. The threshold current density (30–50 A/cm 2 ) was determined. The divergence of the emitted radiation (~7°) and the half-width of the stimulated line (~20 Å) were measured.
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Basov et al. (1971) studied this question.