The very far-infrared spectra of energetic materials and possible confusion materials using terahertz pulsed spectroscopy

被引：37

作者：

Lo, T. ^{[1
]}

Gregory, I. S. ^{[1
]}

Baker, C. ^{[1
]}

Taday, P. F. ^{[1
]}

Tribe, W. R. ^{[1
]}

Kemp, M. C. ^{[1
]}

机构：

[1] TeraView Ltd, Cambridge CB4 0WS, England

来源：

VIBRATIONAL SPECTROSCOPY | 2006年 / 42卷 / 02期

关键词：

terahertz pulsed spectroscopy; explosive; time domain; far infrared; vibrational spectrum; crystalline phonon vibrations;

D O I：

10.1016/j.vibspec.2006.03.002

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We have measured the terahertz absorption spectra of 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), pentaerythritol tetranitrate (PETN), 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX), 2,4,6-trinitrotoluene (TNT), the plastic explosives Semtex H, SX2, and Metabel, and a number of confusion materials using terahertz pulsed transmission spectroscopy. Spectral fingerprints were obtained from 3 to 133 cm(-1). The spectra of the plastic explosives are dominated by the spectral signatures of their explosive components due to low frequency vibrations and crystalline phonon modes. Importantly, the terahertz spectra of the confusion materials show no resemblance to the explosives spectra. The refractive indices obtained for the plastic explosives and confusion materials allowed us to derive reflectance spectra, which appear distinct and so suggest that terahertz reflection spectroscopy is a suitable tool for the detection of concealed explosives in security applications. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：243 / 248

页数：6

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