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8 May 2009 Molecular signal as a signature for detection of energetic materials in filament-induced breakdown spectroscopy
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Abstract
Laser Induced Breakdown Spectroscopy (LIBS) by self-channeled femtosecond pulses is characterized for detection of energetic materials. Different polymers are spin coated on silicon wafers to provide a thin organic layer with controllable thickness ranging from 500 nm to 1 μm. Spectral analysis of atomic and molecular carbon emission shows CN molecular signal from samples that do not contain nitrogen. This can be explained by possible molecular recombination between native atomic carbon and atmospheric nitrogen. As a consequence, caution must be exercised when using spectral signatures based on CN emission for explosive detection by filament-induced LIBS.
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Matthew Weidman, Matthieu Baudelet, Matthew Fisher, Candice Bridge, Chris Brown, Michael Sigman, Paul J. Dagdigian, and Martin Richardson "Molecular signal as a signature for detection of energetic materials in filament-induced breakdown spectroscopy", Proc. SPIE 7304, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing X, 73041G (8 May 2009); https://doi.org/10.1117/12.820522
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