Collisional energy transfer from highly vibrationally excited triatomic molecules

摘要

The atomndash;atom encounter model developed in the accompanying paper lsqb;M. G. Sceats, J. Chem. Phys.91, 0000 (1989)rsqb; is applied to the collisional deactivation of highly vibrationally excited triatomic molecules CS2and SO2by the monatomic colliders He, Ne, Ar, Kr, and Xe at 300 K. The molecular inputs are a crude normal mode analysis, vibrational frequencies and effective anharmonicities, while the collisional inputs are parameters of the atomndash;atom potentials. The results for CS2are compared with the simulations of Bruehl and Schatz and the experiments of Dove, Hippler, and Troe, while those for SO2are compared with the simulations of Schranz and Troe and the experimental results of Heymann, Hippler, and Troe. Excellent agreement is found with experiment, and the superlinear energy dependence of the average energy transfer is attributed to anharmonicity of the triatomic molecule.