Determination of the rate constant of the elementary reaction H+ClF→HCl*+F

The rate constant of the elementary reaction H + ClH→HCl* + F was found from an analysis of the delay times of the stimulated emission due to the P₂(3) and P₂(5) transitions in the HF and HCl molecules, respectively, which occurred in a ClF–H₂ laser. This constant was found to be 0.13 ± 0.015 μsec^–1·Torr^–1 = (3.7 ± 0.4)× 10^–12 cm³/sec in the temperature range 300–400°K.