Vibrational Energy Transfer Between Hf And Hcn Molecules Experiment And Theory

Collisional energy transfer between specific vibrational energy states in HF-HCN gas mixtures is studied at 295 K using the laser-induced fluorescence technique. A pulsed HF chemical laser is used to excite HF molecules to the first vibrational state in a gas cell which contains both HF and HCN. Subsequent energy transfer excites the nu3 vibrational mode of HCN. Rate coefficients are determined from the time dependence of the HCN (Nu3) fluorescence signal.