O'Flynn, D;
Crews, C;
Drakos, I;
Christodoulou, C;
Wilson, MD;
Veale, MC;
Seller, P;
(2016)
Materials identification using a small-scale pixellated x-ray diffraction system.
Journal of Physics D: Applied Physics
, 49
(17)
, Article 175304. 10.1088/0022-3727/49/17/175304.
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OFlynn et al Materials identification using a small-scale pixellated x-ray diffraction system AAM.pdf Download (1MB) | Preview |
Abstract
A transmission x-ray diffraction system has been developed using a pixellated, energy-resolving detector (HEXITEC) and a small-scale, mains operated x-ray source (Amptek Mini-X). HEXITEC enables diffraction to be measured without the requirement of incident spectrum filtration, or collimation of the scatter from the sample, preserving a large proportion of the useful signal compared with other diffraction techniques. Due to this efficiency, sufficient molecular information for material identification can be obtained within 5 s despite the relatively low x-ray source power. Diffraction data are presented from caffeine, hexamine, paracetamol, plastic explosives and narcotics. The capability to determine molecular information from aspirin tablets inside their packaging is demonstrated. Material selectivity and the potential for a sample classification model is shown with principal component analysis, through which each different material can be clearly resolved.
| Type: | Article |
|---|---|
| Title: | Materials identification using a small-scale pixellated x-ray diffraction system |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0022-3727/49/17/175304 |
| Publisher version: | http://dx.doi.org/10.1088/0022-3727/49/17/175304 |
| Language: | English |
| Additional information: | Copyright © 2016 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics D: Applied Physics. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0022-3727/49/17/175304 |
| Keywords: | x-ray diffraction, energy-resolving detector, materials identification, pharmaceuticals, principal component analysis, illicit drugs, explosives |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1489854 |
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