✦ LIBER ✦

Pressure saturation of SO2(3B1 0,0,0) lifetimes

✍ Scribed by Fred B. Wampler; Richard C. Oldenborg; Walter W. Rice

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 253 KB
Volume: 11
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550110204

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✦ Synopsis

Abstract

Lifetime data have been obtained for the decay of SO~2~(^3^B~1~ 0,0,0) at 25°C over the pressure range of 1–762 torr. The ^3^B~1~ state was populated by direct absorption to eliminate any possible complications in interpretation due to the participation of excited‐singlet manifolds. At pressures greater than about 10 torr, the measured lifetimes are longer than predicted from low‐pressure Stern–Volmer parameters. This deviation can be interpreted in terms of Freed's theory on collisionally induced intersystem crossing and provides unequivocal evidence to support earlier speculations that the lengthening of the lifetimes at high pressures is due to saturation in depopulation of the ^3^B~1~ state.

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