Use of stimulated emission delay in determination of the relaxation constants of $\operatorname{HF}^*$ interacting with chlorine fluorides

The method of delaying stimulated emission relative to the beginning of an initiating light pulse was used in the determination of the relaxation constants of vibrationally excited $\operatorname{HF}^*$ molecules interacting with chlorine fluorides. The following effective constants were obtained: $\operatorname{HF}_{\nu=2}+\operatorname{ClF}_5\overset{k}\to\operatorname{HF}_{\nu=1}+\operatorname{ClF}_5$, $k=(1.8\pm 0.6)\times 10^5\operatorname{sec}^{-1}\cdot\operatorname{Torr}^{-1}$; $\operatorname{HF}_{\nu=2}+\operatorname{ClF}\overset{k}\to\operatorname{HF}_{\nu=1}+\operatorname{ClF}$, $k=(5.8\pm 1)\times 10^3 \operatorname{sec}^{-1}\cdot\operatorname{Torr}^{-1}$; $\operatorname{HF}_{\nu=1}+\operatorname{ClF}_3\overset{k}\to\operatorname{HF}_{\nu=0}+\operatorname{ClF}_3$, $k=(2\pm 0.6)\times 10^5 \operatorname{sec}^{-1}\cdot\operatorname{Torr}^{-1}$. The vahies obtained for the $\operatorname{ClF}_3$ and $\operatorname{ClF}$ molecules were of the same order of magnitude as the values found by thie luminescence decay method.