Energy dispersive X-ray diffraction (EDXRD) is a technique which can be used to improve the detection and
characterisation of explosive materials. This study has performed EDXRD measurements of various explosive
compounds using a novel, X-ray sensitive, pixelated, energy resolving detector developed at the Rutherford Appleton
Laboratory, UK (RAL). EDXRD measurements are normally performed at a fixed scattering angle, but
the 80×80 pixel detector makes it possible to collect both spatially resolved and energy resolved data simultaneously.
The detector material used is Cadmium Telluride (CdTe), which can be utilised at room temperature
and gives excellent spectral resolution. The setup uses characteristics from both energy dispersive and angular
dispersive scattering techniques to optimise specificity and speed. The purpose of the study is to develop X-ray
pattern "footprints" of explosive materials based on spatial and energy resolved diffraction data, which can then
be used for the identification of such materials hidden inside packages or baggage. The RAL detector is the
first energy resolving pixelated detector capable of providing an energy resolution of 1.0-1.5% at energies up to
150 keV. The benefit of using this device in a baggage scanner would be the provision of highly specific signatures
to a range of explosive materials. We have measured diffraction profiles of five explosives and other compounds
used to make explosive materials. High resolution spectra have been obtained. Results are presented to show
the specificity of the technique in finding explosives within baggage.
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