Absolute rate constants for the reaction O(3P)+NO2→NO+O2 over the temperature range 230–339°K

Abstract

Using the technique of flash photolysis‐resonance fluorescence, absolute rate constants have been measured for the reaction $\mathrm{O}{(}^3{\mathrm{P)}}^{+}{\mathrm{NO}}_2\to {\mathrm{NO}}^{+}{\mathrm{O}}_2$ . Over the temperature range 230–339°K, the rate constant was found to have the value ${\text{k=9.12± 0.44 × 10}}^{\text{−12}}{\mathrm{cm}}^3\hspace{0.17em}{\mathrm{molecule}}^{\text{−1}}{\sec }^{\text{−1}}$ , independent of temperature. At stratospheric temperatures, this rate constant is about a factor of two faster than indicated from previous measurements.