September 1, 2012
Journal Article

Spectral and angular dependence of mid-infrared diffuse scattering from explosives residues for standoff detection using external cavity quantum cascade lasers

Abstract

We present a study of the spectral and angular dependence of scattered mid-infrared light from surfaces coated with explosives residues (TNT, RDX, and tetryl) detected at a 2 meter standoff distance. An external cavity quantum cascade laser provided tunable illumination between 7 and 8 µm. Important differences were identified in the spectral features between specular reflection and diffuse scattering which will impact most practical testing scenarios and complicate material identification. We discuss some of the factors influencing the dependence of observed spectra on the experimental geometry.

Revised: May 7, 2013 | Published: September 1, 2012

Citation

Suter J.D., B.E. Bernacki, and M.C. Phillips. 2012. Spectral and angular dependence of mid-infrared diffuse scattering from explosives residues for standoff detection using external cavity quantum cascade lasers. Applied Physics B. Lasers and Optics 108, no. 4:965-974. PNNL-SA-85250. doi:10.1007/s00340-012-5134-2