- Author
-
Smyth, K. C.
|
Taylor, P. H.
- Title
- Detection of the Methyl Radical in a Methane/Air Diffusion Flame by Multiphoton Ionization Spectroscopy.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Journal
-
Chemical Physics Letters,
Vol. 122,
No. 5,
518-522,
December 20, 1985
- Keywords
-
diffusion flames
|
radicals
|
photolysis
- Abstract
- Methyl radicals have been detected in an atmospheric pressure, methane/air diffusion flame by three-photon ionization. The origin band of the transition between the ground electronic state and the Rydberg stte is observed at 333.5 nm via two-photon excitation. A second peak at 340.8 nm is likely due to both a methyl radical hot band in the same electronic transition and three-photon ionization of carbon atoms produced by photolysis. Spatial profiles are presented as a function of height above the burner and are discussed in terms of resonant and non-resonant ionization processes.