Vibration-Rotation Line Strengths Of The Gas-Phase Oh Radical

James Podolske

doi:10.1117/12.937463

26 November 1983 Vibration-Rotation Line Strengths Of The Gas-Phase Oh Radical

James Podolske

Proceedings Volume 0438, Tunable Diode Laser Development and Spectroscopy Applications; (1983) https://doi.org/10.1117/12.937463
Event: 27th Annual Technical Symposium, 1983, San Diego, United States

Abstract

Absorption line strengths have been measured at 295 K for the first time for four vibration-rotation transitions of the OH radical, using a tunable, infrared diode-laser in conjunction with a molecular modulation spectrometer. A periodically varying OH concentration was created by photolysis, using a sinusoidally modulated 25374_ Hg lamp, of a flowing mixture of 03 and H2O contained within a quartz-walled White cell. The modulated absorption owing to the OH radical was subsequently observed by phase-sensitive detection. The absolute modulation amplitude of the OH number density was obtained by numerical simulation of the complete time-dependent photochemical system. The strongest transition measured was at 3407.607 cm-1, with a strength of 3.3 ±1.5 x 10-20 cm-1 molecule-1 cm2.

Citation Download Citation

James Podolske "Vibration-Rotation Line Strengths Of The Gas-Phase Oh Radical", Proc. SPIE 0438, Tunable Diode Laser Development and Spectroscopy Applications, (26 November 1983); https://doi.org/10.1117/12.937463

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