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Molecular Physics
An International Journal at the Interface Between Chemistry and Physics
Volume 51, 1984 - Issue 2
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Original Articles

Photodissociation within classical S matrix theory

Hyperbolic umbilic uniform approximation and application to CH3I + ℏθ → CH3 + I*

Stephen K. Gray Theoretical Chemistry Department, 1 South Parks Road, Oxford, OX1 3TG, England
&
Mark S. Child Theoretical Chemistry Department, 1 South Parks Road, Oxford, OX1 3TG, England
Pages 189-210 | Received 09 Jun 1983, Accepted 07 Sep 1983, Published online: 22 Aug 2006
 
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Abstract

Classical S matrix theory is used to describe photodissociation with the aid of the hyperbolic umbilic uniform approximation. A two degree of freedom model for CH3I, due to Shapiro and Bersohn, is studied and the uniform semiclassical results are found to be in good accord with exact quantum calculations. The semiclassical picture is also found to be an aid in understanding the more qualitative features of photodissociation. This leads to a modification of the original Shapiro and Bersohn model to bring the theoretical results into better agreement with experiment.

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Related Research Data

Time‐dependent dynamics of methyl iodide photodissociation in the first continuum
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Methyl rotation, vibration, and alignment from a multiphoton ionization study of the 266 nm photodissociation of methyl iodide
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