Vector correlations in the reaction O(3P)+CS(X 1Σ+)→CO(X 1Σ+) +S(3P)

M. L. Costen, G. Hancock, A. J. Orr-Ewing, D. Summerfield

Research output: Contribution to journalArticle

Abstract

The reaction O(3P)+CS(X 1Σ+) →CO(X 1Σ+)+S(3P) has been studied using translationally aligned oxygen atoms formed from the 355 nm polarized photodissociation of NO2. The nascent CO product was detected by laser-induced fluorescence (LIF) with sub-Doppler resolution in order to extract the pair correlations between the reagent and product relative velocities k and k′ and the product rotational angular momentum J′. Previous theories interpreting the Doppler profiles of photodissociation products in terms of vector correlations have been extended to the case of bimolecular reactions. The system studied was seen to yield a close to isotropic distribution of product velocities k′ about the k direction, and a rotational alignment of J′ with k close to zero. The CO molecule departs with its rotational angular momentum vector J′ aligned preferentially perpendicular to the product relative velocity k′, hence exhibiting a negative k′, J′ correlation. Further insight has been gained on these results by quasiclassical trajectory (QCT) calculations on a London-Eyring-Polanyi-Sato (LEPS) potential energy surface (PES).

Original languageEnglish
Pages (from-to)2754-2764
Number of pages11
JournalThe Journal of Chemical Physics
Volume100
Issue number4
DOIs
Publication statusPublished - 15 Feb 1994

ASJC Scopus subject areas

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

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