Kinetics of the BrO + NO2 association reaction. Temperature and pressure dependence in the falloff regime

A laser flash photolysis‐long path absorption technique has been employed to study the kinetics of the reaction products as a function of temperature (248–346 K), pressure (16–800 torr), and buffer gas identity (N2, CF4). The reaction is found to be in the falloff regime between third and second‐order over the entire range of conditions investigated. This is the first study where temperature‐dependent measurements of k1(P, T) have been reported at pressures greater than 12 torr; hence, our results help constrain choices of k1(P, T) for use in models of lower stratospheric BrOx chemistry. Approximate falloff parameters in a convenient form for atmospheric modeling are derived.