Photodissociation of sulfur dioxide: The Ẽ state revisited

Kenneth Knappenberger, A. W. Castleman

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The pump-probe technique has been employed to study the photodissociation processes of sulfur dioxide (SO2). The SO2+ transient has been fit to a biexponential with decay times of 230 ± 9 fs and 8 ± 4 ps. The growth of 32SO+ was determined to be 225 ± 10 fs with a decay of 373 ± 27 fs. The response of the isotope 34SO2+ was also fit to biexponential decay with lifetimes of 195 ± 14 fs and 4 ± 1 ps. The decay of 34SO+ was fit to 381 ± 30 fs. The results display that an inverse kinetic isotope effect is operative during dissociation of SO2 through the Ẽ state.

Original languageEnglish (US)
Pages (from-to)9-14
Number of pages6
JournalJournal of Physical Chemistry A
Issue number1
StatePublished - Jan 8 2004

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry


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