Absolute rate constants and reactive cross sections for the reactions of O(1D) with molecular hydrogen and deuterium

S. Koppe, T. Laurent, P. D. Naik, H. R. Volpp, J. Wolfrum, T. Arusi-Parpar, I. Bar, S. Rosenwaks

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The dynamics of the reaction of O(1D) with molecular hydrogen and deuterium has been investigated using "superthermal" O(1D) atoms generated by laser photolysis of N2O at 193 nm. H/D atom products have been detected under single-collision conditions by vacuum ultraviolet laser-induced fluorescence at the Lyman-α transition. With a calibration method using HCl photolysis as a source of well-defined H atom concentrations, the following absolute rate constants k and absolute reactive cross sections σR have been determined: k= (2.7±0.6) × 10-10 cm3 s-1 molecule-1 and σR(0.12 eV) =7.6±1.5 Å2 for the reaction O(1D)+H2→OH+H, and k=(2.3±0.5)×10-10 cm3 s-1 molecule-1 and σR(0.18 eV)=7.0±1.4 Å2 for the reaction O(1D)+D2→OD+D.

Original languageEnglish
Pages (from-to)546-552
Number of pages7
JournalChemical Physics Letters
Volume214
Issue number6
DOIs
StatePublished - 19 Nov 1993

ASJC Scopus subject areas

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

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