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Direct observations of chemi-ionization in hydrocarbon flames enhanced by laser excited CH*(A 2 Δ) and CH*(B2Σ−)

✍ Scribed by Terrill A. Cool; Paul J.H. Tjossem

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
705 KB
Volume
111
Category
Article
ISSN
0009-2614

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✦ Synopsis

An experimental method based on the detection of the enhancement of chemi-ionization following the pulsed laser excitation of CH*(A *A, B 'Z-) radicals is described.

This approach provides conclusive and direct obserwtions of chemiionization reactions involving Cil*(A 2~, B',r-) radicals. The results suggest that the rate constants for the reactions CH*(A =A, B '13 + 0 -HCO'+ e-are rtpprosimately 2000 times faster at 2100 K than the previously measured rate constant for the reaction CWX 'n) + 0 -t liCO* + e-which is believed to be a primary source of chemi-ionization in all hydrocarbon tlames.

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