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Spatially Resolved Vibrational Temperature Profiles in Flames from Molecular Absorption Spectroscopy

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A highly collimated laser beam is used to observe molecular absorption in a premixed air-acetylene flame by providing a two-dimensional image on a vidicon camera. Spatially resolved molecular concentrations can thus be obtained in 1/60 second. By measurement of the relative intensities of absorption from different vibrational levels in the ground state of the molecules, a vibrational temperature can be derived for each of the spatial regions in the flame. This information is directly relevant to the understanding of dissociation in flames.

Keywords: Flame spectroscopy; Lasers, cw dye; Techniques, spectroscopic; Temperature measurements

Document Type: Research Article


Affiliations: Ames Laboratory and Department of Chemistry, Iowa State University, Ames, Iowa 50011

Publication date: September 1, 1984

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