The kinetics of the recombination reaction, OH+NO+(M) --> Products have been investigated by the Pulsed Laser Photolysis-Laser Induced Fluorescence (PLP-LIF) technique in nitrogen and helium buffer gases at room temperature and as a function of pressure (30-900 Torr). Our values for the absolute rate coefficient in nitrogen at room temperature are in excellent agreement with the JPL 2003 and with the current IUPAC 2003 recommendations. With the exception of a very old study by Overend, our rate constants in helium are the only ones to cover the range of pressures between 30 and 900 Torr.
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