VIBRATIONAL ENERGY TRANSFER STUDIES IN $CH_{2}D_{2}$

Author Institution: Department of Chemistry and Materials Research Center, Northwestern UniversityUpon irradiation of $CH_{2}D_{2}$ with a pulsed or Q-switched $CO_{2}$ laser operating on a number of R branch lines of the $001-02^{\circ}$ 0 transition, fluorescence has been observed from all the infrared active fundamentals. Fluorescence risetimes and full times have been measured and will be reported. Pathways for vibrational equilibration steps will be discussed. A comparison will be made with equilibration pathways (in the slightly asymmetric top molecule, $CH_{2}D_{2}$) to those in symmetric top molecules. The effect of dipole selection rules on equilibration pathways will be discussed. Rates of deactivation of $CH_{2}D_{2}$ fundamental by rare gases will be reported. The relative contribution of $V \rightarrow T$ and $V \rightarrow R$ processes to the observed rate will be discussed