Abstract
Laser-saturated fluorescence (LSF) measurements of NH have been performed in a premixed methane/nitrous oxide/argon flat flame at a pressure of 50 Torr and an equivalence ratio of 1.10. The degree of saturation of the NH fluorescence signal is approximately 96%. The balanced cross-rate model is used to calculate number densities from the measured fluorescence signals. Independent LSF and optical absorption measurements of NH number density agree to within 20%. The estimated NH detection limit of the fluorescence system is 10 12 molecules/cm 3 .
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