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Isotope specific photodissociation of SO2 at 193.3 nm

✍ Scribed by Peter Felder; Bernd-Michael Haas; J. Robert Huber

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 796 KB
Volume: 204
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)90004-k

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✦ Synopsis

The 193 nm photodissociation of the isotopomers SOz, SO: and SOO' (with O*= '*O) was studied by high-resolution photofragment translational spectroscopy. The translational energy distributions P(&) of the fragment pairs SOtO, SO'tff, SOt(T and SO*+0 were determined from systematic analysis of the time-of-flight distributions obtained with various degrees of O* substitution and were found to be significantly different due to a different m-vibrational distribution of the diatomic fragments. In the case of the symmetric isotopomers SO, and S@ the difference of the P(&) distributions is attributed to a slightly different state excitation in the e electronic band of the parent molecule, The S-O and S-0' bond fission of the asymmetric SOO* have equal probabilities but lead to different energy distributions in the SO and SO* fragments which reflect subtle differences in the dissociation dynamics of the two reaction modes.

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