Relaxation of Vibrational Nonequilibrium Distributions. II. The Effect of the Collisional Transition Probabilities on the Relaxation Behavior

In order to test the influence of the collisional transition probabilities on the relaxation behavior of initial vibrational nonequilibrium distributions, we have used collisional transition probabilities which increase exponentially with an increase in the vibrational quantum number. The results obtained for this set of transition probabilities are compared with the results obtained for the Landau-Teller transition probabilities which increase linearly with an increase in the vibrational quantum number. Numerical calculations for the relaxation of various initial δ function and Boltzmann distributions show that the detailed relaxation behavior depends quite strongly on the form of the collisional transition probabilities.