Abstract
The dynamic behavior of a relaxing CO–He mixture has been studied with a computer. The time evolution of the nonequilibrium vibrational population distribution was obtained by numerically integrating the master equations for the vibrational population including vibrational–vibrational (V–V), vibrational–translational (V–T), and spontaneous decay processes. The results show the characteristic relaxation through the V–V energy transfer of an anharmonic molecule. The calculations are compared with the vibrational population distribution measured from two different experimental works: (i) ir chemiluminescence data from chemically excited CO formed in the reactions O+C2H2 → CO*+CH2+51 kcal/mole, O+CH2 → CO*+2H+71 kcal/mole; (ii) vibrationally excited CO produced in an electrical discharge induced reaction O+CS2→SO+CS, O+CS→CO*+S+75 kcal/mole and measured using a pulsed delay technique.
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