RH03		15min2:04

S. M. CLEGG, C. S. PARMENTER, Department of Chemistry, Indiana University, Bloomington, IN 47405; S.-P. LU, Innovative Lasers Corp., 3280 East Hemisphere Loop \#120, Tucson, AZ 85706.

Energy transfer from S₁ glyoxal (CHO-CHO) in collision with additional target gases is now added to a list of collision partners (H₂, D₂, He, Kr, and C₆H₁₂) previously presented. A laser is used to pump glyoxal to the 0⁰, 0\leq J'\leq 10 K'=0 level of the S₁ (¹A_u) state. Rotational excitation with resolution of K states can be observed in competition with rovibrational energy transfer to the lowest frequency mode, ₇ (also seen with K state resolution). Relative cross sections are obtained from computer simulations of the observed inelastic scattering fluorescence spectrum. A more complete picture of the relationship between rovibrational energy transfer and the reduced mass of the collision partner will be presented. These results can also be used to further establish benchmarks for the 3-dimensional quantal scattering model that has so successfully been used with past glyoxal energy transfer studies.