Abstract

Quantum scattering dynamics calculation is used to study initial-state-resolved reaction probabilities, integral cross section, initial state selected reaction rate constants and thermal rate constant for both channels of the reaction ND(a1Δ)+H(2S)→products on the modified NH2A˜2A1 potential energy surface (PES) using centrifugal sudden (CS) approximation. This surface is barrierless and therefore, for depletion channel, probabilities have small centrifugal thresholds and present sharp and large resonances, associated with long-lived collision complexes. Integral cross sections for both reactions depend strongly on initial rotational states. In particular, thermal reaction rate constant for depletion channel is in good agreement with experimental and semiclassical results.

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