Three-dimensional quantum theory of the H+H2 reaction in strong laser fields

Tamar Seideman*, Moshe Shapiro

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Three-dimensional quantum theory of triatomic exchange reactions in strong laser fields is presented. Our theory consists of an exact partitioning technique for treating the effects of optical fields on reactive scattering, based on approximate hindered-rotor adiabatic wave functions describing the pure nonradiative events. The method enables computations to be performed for an arbitrary number of field intensities with very little effort beyond that required for a single-intensity computation. Differential and integral cross sections for the H+H2 exchange reaction, involving the ground and first excited electronic states, in the presence of laser fields, are computed. The dependence of reactive nonlinear optical effects, and especially that of "laser catalysis," on laser intensity; the way isolated and overlapping power-broadened resonances affect the optically induced reaction; the role of relative orientation of two incident molecular beams in crossed beams experiments are investigated. The three-dimensional computations confirm our previous expectations, based on a collinear model, that laser catalysis is achievable using only moderately high powered lasers. The above is expected to be true for all reactive systems (of which H + H2 is one) possessing optically allowed stable excited electronic states.

Original languageEnglish (US)
Pages (from-to)7910-7928
Number of pages19
JournalThe Journal of Chemical Physics
Volume94
Issue number12
DOIs
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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