SELECTIVE OPTICAL EXCITATION AND INVERSIONS VIA THE EXCIMER CHANNEL - SUPER-RADIANCE AT THE THALLIUM GREEN LINE

Inversion and superradiance at the Tl green line (5351 Å) has been observed using Tl-Hg and Tl-Cd-Ar systems pumped optically via the excimer channel with a pulsed nitrogen dye laser. Superradiant power outputs up to 200 W averaged over the pulse (without any mirrors) have been obtained with a 90-cm-long Tl-Hg tube. The general applicability of this method to other excimer systems should provide a means of generating coherent radiation at new wavelengths and in understanding collision processes.