A Model to Calculate Vibrational-Vibrational Energy Transfer Between Diatomic Molecules

Hamzeh M. Abdel-Halim

Department of Chemistry, College of Science, The Hashemite University P.O. Box 150459, Zarqa 13115 (Jordan)

A newly developed model to calculate vibrational energy transfer between diatomic molecules is presented. The mode is using the method of distorted waves and the Morse potential to obtain a quantum-mechanical analysis of molecular vibrational-vibrational energy transfer. The model is used to calculate the probability and the rate constant of vibrational energy transfer between pairs of diatomic molecules. The V-V rate constants for several collision pairs, including CO, O2, N2, H2, HD, D2, F2, Cl2, NO, HCl and DCl were calculated at various temperatures. Trends in probability of V-V transfer are concluded from the results of calculations. The accuracy of the model is checked by comparisons with experimental rates obtained by other investigators. Good agreement between experimental and calculated values is observed.

Vibrational-Vibrational energy transfer; Diatomic molecules