An adiabatic analysis of the reactive infinite order sudden approximation
- 15 March 1983
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 78 (6), 3014-3020
- https://doi.org/10.1063/1.445262
Abstract
A vibrationally adiabatic infinite order sudden approximation (IOSA) is formulated in terms of angle dependent adiabatic barriers. These barriers are determined by half‐integer action periodic orbits. We show that in the F+HH reaction, the adiabatic theory describes quantitatively the exact IOSA total reactive cross section over a relatively large range of translational energies. A detailed analysis points out why in many cases transition state theory becomes more accurate as one goes from the collinear to the 3D world. Inversion of the quasiclassical IOSA provides a good estimate of the angular dependence of the adiabatic barrier parameters.Keywords
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