Absolute intensity measurements of impurity emissions in a shock tunnel and their consequences for laser-induced fluorescence experiments |
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Authors: | P. C. Palma A. F. P. Houwing R. J. Sandeman |
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Affiliation: | (1) Department of Physics and Theoretical Physics, Faculty of Science, Australian National University, GPO Box 4, 2601 Canberra, Australia |
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Abstract: | Absolute intensity measurements of impurity emissions in a shock tunnel nozzle flow are presented. The impurity emission intensities were measured with a photomultiplier and optical multichannel analyser and calibrated against an intensity standard. The various metallic contaminants were identified and their intensities measured in the spectral regions 290 to 330 nm and 375 to 385 nm. A comparison with calculated fluorescence intensities for predissociated laser-induced fluorescence signals is made. It is found that the emission background is negligible for most fluorescence experiments.This article was processed using Springer-Verlag TEX Shock Waves macro package 1.0 and the AMS fonts, developed by the American Mathematical Society. |
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Keywords: | Laser-induced predissociation fluorescence Shock tunnel impurities Absolute intensity measurements |
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