A classical trajectory study of inelastic collisions between highly vibrationally excited KBr and Ar

We present a study of inelastic collisions between highly vibrationally excited KBr and Ar based on three-dimensional classical trajectory calculations. Calculations are performed for three closely related potential energy surfaces chosen to allow determination of the importance of an attractive well. Comparison with experiment indicates that both depth and shape of an attractive well are important for calculating detailed scattering distributions. Analysis of selected trajectories indicates that double impact collisions play an important role in the overall vibrational deactivation mechanism. Double impact collisions occur frequently for all three surfaces and, unlike the situation in one dimension, transfer energy very efficiently