VIBRATIONAL-RELAXATION OF DF (V=1-4) IN D-2, H-2, N-2, HF, AND CO2

The deactivation of the upper vibrational levels of DF by H2, D2, N2, HF, and CO2 has been studied with the technique of laser-induced fluorescence. The upper vibrational levels were produced by sequential photon absorption in which DF (v = 0) was pumped first to DF (v = 1) and subsequently to DF (v = 2), DF (v = 3), and DF (v = 4) by photons from a pulsed multiline DF chemical laser. The deactivation rates (V - V + V - R, T) for all the collision partners except D2 scaled with vibrational level as vn with n = 1.9 to 2.0 for v = 1 to 4. Similar studies have indicated the somewhat larger value of n = 2.7±0.2 for HF (v) deactivation by diatomic molecules. © 1979 American Institute of Physics.