Stimulated emission due to infrared transitions in chlorine atoms in gaseous mixtures pumped by uranium fission fragments

Abstract

Quasi-cw stimulated emission of ~ 10 ms pulses at the wavelengths A = 1.59 and 2.45 um of the chlorine atom was detected when mixtures of He, Ne, and Ar with CC1 4 , CHCI3, CF 2 C1 2 , and C 2 F 3 C1 3 were excited by uranium fission fragments. Stimulated emission of the k = 2.45 (im line under nuclear pumping conditions at high pressures was observed for the first time. The maximum energy parameters (output radiation power 130 W, efficiency about 0.2%) were achieved for the 1.59 um line in a mixture of the He: Ne: CC1 4 = 25 000:25 000:1 composition at a pressure of 2 bar. The minimum lasing threshold for this line corresponded to a thermal neutron flux of 2x 10 13 cm" 2 s" 1 . S P Mel'nikov, V V Porkhaev Russian