Shock Tube Studies of HF Vibrational Relaxation.
Report for Feb 70-Mar 71,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
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The vibrational relaxation of HF has been studied behind incident shock waves in the temperature range 1350 to 4000K by monitoring the 2.7 millimicrons infrared emission. Relaxation times reduced to standard pressure were obtained for mixtures containing 1 to 10 HF in argon and for mixtures containing N2, He, and D2. These data were used to calculate the relaxation times of HF due to these various gases. The relaxation rate of HF due to itself is compared to the predictions of several theories of V-T and V-R energy transfer and to published experimental rates for other hydrogen halides. The HF rates of this study, together with the measured rate at room temperature, suggest the possibility of an attractive potential playing a dominant role in energy transfer at low temperature. Author
- Atomic and Molecular Physics and Spectroscopy