Photodepletion and dynamics of oxygen atoms in xenon matrices

E. Todd Ryan*, Eric Weitz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The photodepletion and reaction dynamics of O atoms isolated in xenon matrices have been studied. Oxygen atoms are generated by 193 nm photolysis of a N2O dopant and monitored via the laser-induced fluorescence of XeO exciplexes produced by the 248 nm excitation of Xe/O pairs. Dissociative relaxation of XeO exciplexes generates energetic O atoms which may travel significant distances in the matrix. This photoinduced mobility can lead to O atom loss. The O atom loss process is found to be bimolecular from 15 to 42 K at all fluences studied and is ascribed to an O+O recombination process. Higher temperature data (42 K) may exhibit behavior characteristic of a transition from second order to first order kinetics. A kinetic scheme is derived which can be used to model the data and infer a microscopic description of the O atom dynamics.

Original languageEnglish (US)
Pages (from-to)8628-8636
Number of pages9
JournalThe Journal of Chemical Physics
Volume99
Issue number11
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

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

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