Abstract

Using the non-reactive classical jz-conserving approximation we explore the approach of H to H2. The purpose is to examine the dynamical consequences of several possible modifications of the intermediate- and long-range part of the SLTH potential-energy surface. The reason for the possible need of modification is the present disagreement between experiment and theory for resonances in the H + H2 collision. It is shown how the stretching of the molecule determines the number of long-lived trajectories and its energy dependence. The influence of initial H2 rotation is also studied. Several novel aspects of the jz-conserving approximation, applicable to a wider set of systems, are introduced.

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