Resonance-Enhanced Raman Spectroscopy on Explosives Vapor at Standoff Distances

Figure 11

Resonance Raman spectrum from outdoor measurement on nitro methane in vapor phase at an irradiation wavelength of 220 nm. The sample temperature was approximately 328 K, the outdoor temperature was 274 K, and the atmospheric pressure was about 755 Torr. The spectrum was accumulated during 1000 laser pulses.