Terahertz spectroscopy of explosive materials

Yaochun Shen; Philip F. Taday; Michael C. Kemp

doi:10.1117/12.577188

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8 December 2004 Terahertz spectroscopy of explosive materials

Yaochun Shen, Philip F. Taday, Michael C. Kemp

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Proceedings Volume 5619, Passive Millimetre-Wave and Terahertz Imaging and Technology; (2004) https://doi.org/10.1117/12.577188
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

The terahertz spectrum of the explosive RDX has been measured using a conventional Fourier transform infrared spectroscopy and by terahertz pulse spectroscopy in transmission and reflection modes. Seven absorption features in the spectral range 5-120 cm^-1 have been observed and identified as the fingerprints of RDX explosive. Furthermore, a sample consisting of RDX-based explosive, mounted side by side with lactose and sucrose pellets, has been imaged using a terahertz pulse imaging system. The recorded terahertz images and their spectral data have a spectral resolution of 1 cm^-1 and cover a spectral range of 5-80 cm^-1. This broad spectral coverage enables the spatial distribution of individual chemical substances of the sample to be mapped out. We also discuss the application of Principal Component Analysis and Component Spatial Pattern Analysis to the automatic identification of materials, such as explosives, from terahertz imaging.

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Yaochun Shen, Philip F. Taday, and Michael C. Kemp "Terahertz spectroscopy of explosive materials", Proc. SPIE 5619, Passive Millimetre-Wave and Terahertz Imaging and Technology, (8 December 2004); https://doi.org/10.1117/12.577188

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