Journal
APPLIED SPECTROSCOPY
Volume 62, Issue 10, Pages 1078-1083Publisher
SOC APPLIED SPECTROSCOPY
DOI: 10.1366/000370208786049024
Keywords
Raman spectroscopy; Ultraviolet Raman spectroscopy; Cross-sections; Chemical agents; Nerve agents; Contamination detection
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Ultraviolet (UV) Raman spectroscopy is being applied to the detection of chemical agent contamination of natural and man-made surfaces. In support of these efforts, we have measured the UV Raman signatures of the G-series nerve agents GA (tabun), GB (sarin), GD (soman), GF (cyclosarin), and the agent simulant diisopropyl methylphosphonate (DIMP) at 248 nm and 262 mn, as well as taking their UV Raman and UV absorption cross-sections. Of these chemicals, only GA exhibits any significant pre-resonance enhancement. We also show that reduction of the excitation wavelength from 262 nm to 248 nm effectively shifts the Raman spectrum away from a substantial sample fluorescence background, implying a significant improvement in detection capability.
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