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- Title
Cavity ring-down spectroscopy of OH radicals in low pressure flame.
- Authors
Cheskis, S.; Derzy, I.; Lozovsky, V.A.; Kachanov, A.; Romanini, D.
- Abstract
Abstract. Cavity ring-down laser spectroscopy (CRDS) is used to measure the OH concentration profile and the rotational temperature profile in low-pressure (30 ton*) methane/ air flames. Very high sensitivity (2 x 10[sup 10] molecules/cm[sup 3]) and large dynamic range (more than 20 000) are demonstrated. CRDS also provides accurate temperature measurements, with statistical errors less than 2%. Measured concentration profiles are in reasonable agreement with calculated values. It is observed that in the preflame zone (where the temperature is about 1000 K), the OH concentration at the first vibrational excited state is about seven times larger than the equilibrium OH(v": 1) concentration at this temperature. PACS: 33.20; 42.60; 82.40P
- Subjects
LASER spectroscopy; HYDROXIDES; TEMPERATURE; SPECTRUM analysis; METHANE
- Publication
Applied Physics B: Lasers & Optics, 1998, Vol 66, Issue 3, p377
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s003400050404