A laser photofragment-laser induced fluorescence technique has been developed for the detection of the hydroperoxyl radical, HO2. The OH photofragment rotational distribution peaks at low temperature with a preference for population of the lower energy, 2Π3/2, spin orbit component. Greater than 75% of the O atoms are produced in the O1D state. An HO2 detection sensitivity of 2 × 1011 cm-3 was achieved in 300 Torr of N2, indicating that this approach has the sensitivity and temporal resolution to be useful for kinetic studies of HO2 under realistic atmospheric conditions.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry