Kinetics of the reactions of HBr with O{sub 3} and HO{sub 2}: The yield of HBr from HO{sub 2} + BrO
- Univ. of Colorado, Boulder, CO (United States)
An upper limit on the yield of HBr from reaction (R1) (HO{sub 2} + BrO {yields} products) has been determined by measuring an upper limit for the rate coefficient of the reverse reaction (R1{prime}) (HBr + O{sub 3} {yields} HO{sub 2} + BrO). The limits measured at 300 and 441 K were extrapolated to low temperatures to determine that the yield of HBr from reaction (R1) is negligible throughout the stratosphere (<0.01% of k{sub 1}). An upper limit for the rate coefficient of the reaction of HO{sub 2} with HBr was also determined to be very low {le} 3 x 10{sup {minus}17}cm{sup 3}molecule{sup {minus}1}s{sup {minus}1} at 300 K and {le} 3 x 10{sup {minus}16}cm{sup 3}molecule{sup {minus}1}s{sup {minus}1} at 400 K. The implications of these results to stratospheric chemistry are discussed. 18 refs., 1 fig., 6 tabs.
- OSTI ID:
- 91302
- Journal Information:
- Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: D11 Vol. 99; ISSN JGREA2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
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