Probabilities of vibrational energy exchange between carbon dioxide and carbon tetrafluoride

Abstract

The deactivation rate constant of CO2(ν3) in mixtures with CF4 has been measured at 298 K. A pulsed CO2 laser was used to excite the CO2 molecules. To interpret the mechanism of energy exchange, the probabilities of V–V energy transfer for CO2–CF4 mixtures and the V-T self-relaxation of CF4(ν2) were calculated. The model used considers a Morse potential to describe the interaction between the molecules and the quantum mechanical first order distorted wave approximation to calculate the probabilities. Order of magnitude agreement between the experimental and calculated results for CO2–CF4 mixtures and for the CF4(ν2) self-relaxation is obtained.