LIF detection of IO and the rate coefficients for I + O3 and IO + NO reactions

Laser induced fluorescence (LIF) from the (0, 0), (2, 0), (3, 0) and (2, 1) bands of the A2Π32 → XΠ32 system of IO was detected. Using LIF detection of IO, the rate coefficients for I + O3 ← IO + O2 (k1) and IO + NO → I + NO2 (k2) reactions were measured between 240 and 370 K to be k1(T) = (2.3 ± 0.7 × 10−11 exp[−(860 ± 100)/T] and k2(T) = (1.02 ± 0.31) × 10−11 exp[(185) ± 70)/T] cm3 molecule−1 s−1.