Amplification of λ∼147 nm radiation from discharge in heavy inert gases.

The result are presented on experimental study of VUV spectra of double and triple mixtures of argon, krypton and xenon in de and barrier discharges. Region of 120-200 nm was studied that corresponds to the transitions between dimer lowest excited states and the weakly bound ground states 1(u), 0(u)(+) --> 0(g)(+). The pressure in capillary de discharge was 100 - 1000 hPa and discharge current was 20 - 50 mA. The experiment with 10, 20 and 40 cm tubes corresponded a gain 0.1 cm(-1) at lambda similar to 147 nm.