Stimulated emission of infrared radiation as a result of photolysis of BrCN by λ>180 nm radiation

An experimental study was made of the operation of a photo-dissociation CN laser in the case of photolysis of BrCN–Xe mixtures by radiation of relatively long wavelengths. The study was made as a function of the composition of the mixture, total pressure, and pump energy. It was found that an increase in the delay time of the stimulated emission, accompanied by an increase in the laser output energy observed for low dilutions of the mixture with xenon, could be explained by the model of "delayed" predissociation of the BrCN molecule. Effective quenching of the vibrational excitation of the CN radical by bromine was observed.