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Laser optoacoustic absorption spectra for various explosive vapors

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Abstract

Optoacoustic absorption spectra, using a CO2 laser source, is reported for ethylene glycol dinitrate, 2,4 dinitrotoluene, and nitrogylcerine vapors in a nitrogen background. Strong absorption was measured at all seventy-seven laser transitions in the 9.6-μm and 10.6-μm regions. Absorption coefficient data, necessary to evaluate performance as an explosive detector, were obtained for ethylene glycol dinitrate. The strongest feature showed a value of 7.42 atm−1 cm−1 giving a minimum detection sensitivity of 8.26 ppb W.

© 1978 Optical Society of America

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