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Applied Optics

Applied Optics


  • Vol. 24, Iss. 23 — Dec. 1, 1985
  • pp: 4229–4237

Energy transfer processes in CH A2Δ and B2Σ in an atmospheric pressure flame

Nancy L. Garland and David R. Crosley  »View Author Affiliations

Applied Optics, Vol. 24, Issue 23, pp. 4229-4237 (1985)

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Laser-induced fluorescence studies have been made of the CH radical in atmospheric pressure flames of methane, oxygen, and nitrogen. Individual rotational levels within the υ′ = 0 and 1 vibrational levels of the A2Δ and B2Σ states are excited by a dye laser operating in the 380–440-nm region. Studies were made of collisional energy transfer pathways within and between the states, using rotationally resolved fluorescence scans. Rotational transfer occurred at a rate, dependent on rotational level, 2–5 times that of quenching. Vibrational transfer was slow but transfer between A(υ′ = 1) and B(υ′ = 0) took place at rates ~0.2 that of quenching.

© 1985 Optical Society of America

Original Manuscript: May 22, 1985
Published: December 1, 1985

Nancy L. Garland and David R. Crosley, "Energy transfer processes in CH A2Δ and B2Σ in an atmospheric pressure flame," Appl. Opt. 24, 4229-4237 (1985)

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  1. D. R. Crosley, G. P. Smith, “Laser-Induced Fluorescence Spectroscopy for Combustion Diagnostics,” Opt. Eng. 22, 545 (1983). [CrossRef]
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  31. There is a typographical error in Ref. 4 in which 34 Å2 was given (R. J. Cattolica, Sandia National Laboratories; private communication).
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  33. Utilizing an average relative velocity (8 kT/πμ)1/2, different from that used in the definition for cross section in Ref. 31.

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