Abstract
The flash or laser photolysis-shock tube (FP- or LP-ST) technique for measuring thermal rate constants at high temperatures in reflected shock waves is discussed. The method of detection is atomic resonance absorption spectroscopy (ARAS). The hydrodynamic perturbation due to boundary layer formation is also discussed. Of particular interest is the effect of this process on the thermodynamic state of the hot gas in the reflected regime. Then the method is illustrated with recent results on reactions of importance in the oxidation mechanisms for H 2 and D 2. On the basis of these new direct results, recommendations for the most important rate constants are presented.
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