The rate coefficient for the IO + BrO → products (1) reaction was measured using pulsed laser photolysis with a discharge flow tube for radical production and pulsed laser-induced fluorescence and UV absorption for detection of IO and BrO radicals, respectively. Reaction 1 was studied under pseudo-first-order conditions in IO with an excess of BrO between 204 and 388 K at total pressures of 6-15 Torr. The Arrhenius expression obtained for non-iodine atom producing channels is k1a(T) = (2.5 ± 1.0) × 10-11 exp[(260 ± 100)/T] cm3 molecule-1 s-1 independent of pressure. The rate coefficient for the reaction BrO + BrO → products (2) and the UV absorption cross sections of BrO as a function of temperature were also determined as part of this study. The implications of these results to the loss rate of stratospheric ozone are discussed.
CITATION STYLE
Gilles, M. K., Turnipseed, A. A., Burkholder, J. B., Ravishankara, A. R., & Solomon, S. (1997). Kinetics of the IO radical. 2. Reaction of IO with BrO. Journal of Physical Chemistry A, 101(30), 5526–5534. https://doi.org/10.1021/jp9709159
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