Abstract
A quantum-mechanical study is presented of energy transfer in collinear atom-molecule inelastic collisions. The molecular potential is the well studied two-mode, Henon-Heiles potential. Two atom-molecule interaction potentials are considered: a weak exponential repulsive potential (previously considered in a classical study by Schatz), and a Morse attractive interaction. For these two potentials, the mean energy transfer and transition probabilities, classified according to the “category of chaos” (normal-mode, local-mode, or mixed-mode states), are compared, as functions of the total energy. The classical critical energy for the molecular potential plays no role in the energy dependence of the mean collisional energy transfer. In addition, preservation of memory (hysteresis) about the initial category of chaos is larger for collisions involving the weak repulsive potential.
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