OPTICAL GAIN IN HALOGEN ATOM RECOMBINATION REACTIONS.

The radiative channel of halogen atom recombination reactions is discussed using experimental data. It is shown that various types of population of excited electronic states are formed during recombination. Calculations are made of the optical amplification cross sections for various transitions. It is found that for recombining atom concentrations of (1-5) multiplied by 10**1**8 cm** minus **3 at temperatures not exceeding 600-800 degree K, an optical gain of the order of 10** minus **3 cm** minus **1 may be achieved in the near infrared.