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Infrared fluorescence observations of electronic to vibrational energy transfer from Br* (4 2P12) to SO2

✍ Scribed by David A. Dolson; Aiping Liu; Katherine M. Schreier

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 516 KB
Volume: 212
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)87118-m

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✦ Synopsis

Time-resolved infrared fluorescence observations of the Bf (4 'P,,,) spin-orbit excited state and the SO2 symmetric (v,) and antisymmetric (vl) stretching modes have been obtained following 532 nm laser photolysis of Br2/S02 and IBr/S02 mixtures. The total Bf quenching rate coefkient by SO* was determined from direct BS observations to be (I .l f 0.2) X IO-l3 cm' molecule-' SK' at 298 K. Kinetic evidence from SO* fluorescence and the nearly complete reduction of emission through a cold gas filter suggests that the v) fundamental level is excited preferentially despite the existence of nearly resonant three-quantum stretch levels.

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