Terahertz Frequency Continuous-Wave Spectroscopy and Imaging of Explosive Substances
Figure 7
Absorption curves of (a) cyclotetramethylene-tetranitramine (HMX) compared to (b) icing sugar and (c) pentaerythritol tetranitrate (PETN) with superimposed Lorentz fit functions. The peaks for HMX and icing sugar are similar when found by the Lorentz lineshape function as 1.43 and 1.44 THz, respectively. However, the linewidth of HMX is 0.83 THz while icing sugar has a 0.67 THz linewidth as determined by FWHM of the Lorentz function. PETN (c) exhibits a 1.78 THz spectral peak and 0.80 THz FWHM linewidth.
