Alkyl peroxy radical kinetics measured using near-infrared CW-cavity ring-down spectroscopy

A kinetic reactor system is described which couples pulsed laser photolytic production of radicals with continuous laser excitation cavity ring-down spectroscopic detection in the near-infrared (NIR). The atmospherically relevant alkyl peroxy radicalEs ethyl peroxy (C2H5O2) and methyl peroxy (CH3O2) are monitored via their structured absorbance spectra in the NIR near 1.3 mum.