Kinetics of O<INF>2</INF>(<SUP>1</SUP>Σ<INF>g</INF><SUP>+</SUP>) Reaction with H<INF>2</INF> and an Upper Limit for OH Production

The rate coefficients for the removal of O<INF>2</INF>(¹<EQUATION><EQNDATA>%@mt;sys@%Σ%@sx@%g%@be@%+%@sxx@%%@mx@%</EQNDATA> </EQUATION>) (from now on referred to as O<INF>2</INF>(¹Σ)) by H<INF>2</INF> were measured between 209 and 373 K by generating O<INF>2</INF>(¹Σ) via pulsed laser excitation near 762 nm. The rate coefficient was determined to be k<INF>1</INF> = (6.8 ± 1.2) × 10^-12 exp[−(590 ± 52)/T] cm³ molecule^-1 s^-1. Reaction of O<INF>2</INF>(¹Σ) with O<INF>3</INF> yielded O(³P), which was detected by vacuum ultraviolet (VUV)-resonance fluorescence. O<INF>2</INF>(¹Σ) was also prepared by the interaction of O(¹D) with O<INF>2</INF>. In separate experiments, the yield for OH from the title reaction was measured to be &lt;4 × 10^-5 at 298 and 209 K. This upper limit was used in a one-dimensional atmospheric model to show that the contribution of this reaction to the total OH production in the atmosphere is minimal under most conditions.