Direct measurements are reported of the NO( A \*Z +, u' = O-X ZfI) fluorescence lifetime in premixed atmospheric flames, using a picosecond distributed feedback dye laser for excitation. A new version of the distributed oscillator has been designed to allow more convenient tuning of the dye laser. F
Picosecond fluorescence lifetime measurement of the OH radical in an atmospheric pressure flame
✍ Scribed by Ralf Schwarzwald; Penelope Monkhouse; Jürgen Wolfrum
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 389 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0009-2614
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Time-resolved fluorescence measurements are reported for the OH radical in premixed, laminar atmospheric-pressure flames, following excitation of the u' = 1 and v' 30 levels of the A rE+ state. OH radicals were excited using a picosecond dye laser system based on the distributed feedback principle.
A dye laser has been used to excite fluorescence from OH, CN, NH, NO, CH, and C 2 in laboratory premixed flames at atmospheric pressure in connection with an investigation of the chemistry of the nitrogen compounds. OH concentrations were measured independently in a variety of flames by a method inv
Rotationally resolved fluorescence spectra of OH in three different flames and for different excitation levels have been measured and analyzed. The extracted population distributions have been treated with a simple model based on a steady state rate approach. Global parameters such as the ratio of r