Relaxation of the V=4,5,6,7, Σg+ vibrational levels of carbon monoxide studied by laser absorption

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Abstract
The vibrational relaxation of individual vibration rotation levels of carbon monoxide behind incident shock waves of carbon monxide has been studied by the method of laser absorption. For the particular vibrational states (V = 4–7) and temperature range (2500–5500 °K) studied, we conclude that the characteristic relaxation times are in excellent agreement with those obtained via previous measurements of ``bulk'' gas properties. Further, the data furnish strong corroboration of the idea that the individual levels are in Boltzmann vibrational equilibrium during the relaxation process.