Resonance-Enhanced Raman Spectroscopy on Explosives Vapor at Standoff Distances

Figure 4

The apparent Raman cross section for the Raman shifted signal at 1347 cm⁻¹ in DNT as a function of incident wavelength at (a) 354 K, concentration 126 ppm, (b) 368 K, concentration 432 ppm, (c) 371 K, concentration 550 ppm, and (d) 383 K, concentration 1445 ppm.

(a)

(b)

(c)

(d)