Rate coefficients for the relaxation of OH (v = 1) by O2 at temperatures from 204-371 K and by N2O from 243-372 K

We report rate coefficients for the relaxation of OH(v = 1) by O2 and N2O as a function of temperature. The rate coefficients for relaxation (in units of 10−13 cm3 molecule−1 s−1) can be fit by the following expressions:forOH(v=1)+O2between204and371K:k=(0.50±0.06)exp((342±32)/T);forOH(v=1)+N2Obetween243and372K:k=(1.08±0.08)exp((162±22)/T).The results are discussed in terms of the possible mechanisms for relaxation, especially the influence of the weak chemical interaction between OH radicals and O2.