The time-resolved Faraday rotation spectroscopy method with a DFB diode laser at 1434 nm was used to detect the hydroxyl radical OH in the first overtone region. Experiments were made at the most intense Q(3/2) line of the 2 Π 3/2 electronic term. The sufficient concentration for radical measurement is 2 × 10 12 cm −3 , with the resolving time approximately 10 −6 s. This resolution is sufficient for studying fast chemical reactions, which was demonstrated by measuring the rate constant of the OH and dimethylsulfide reaction.
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Plastinina et al. (2024) studied this question.
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