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Photon signature analysis using template matching.


Citation

Bradley, David Andrew and Hashim, S. and Saripan, M. Iqbal and Wells, Kevin and Dunn, W. L. (2011) Photon signature analysis using template matching. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 652 (1). pp. 466-469. ISSN 0168-9002

Abstract

We describe an approach to detect improvised explosive devices (IEDs) by using a template matching procedure. This approach relies on the signature due to backstreaming γ photons from various targets. In this work we have simulated cylindrical targets of aluminum, iron, copper, water and ammonium nitrate (nitrogen-rich fertilizer). We simulate 3.5 MeV source photons distributed on a plane inside a shielded area using Monte Carlo N-Particle (MCNPTM) code version 5 (V5). The 3.5 MeV source gamma rays yield 511 keV peaks due to pair production and scattered gamma rays. In this work, we simulate capture of those photons that backstream, after impinging on the target element, toward a NaI detector. The captured backstreamed photons are expected to produce a unique spectrum that will become part of a simple signal processing recognition system based on the template matching method. Different elements were simulated using different sets of random numbers in the Monte Carlo simulation. To date, the sum of absolute differences (SAD) method has been used to match the template. In the examples investigated, template matching was found to detect all elements correctly.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.nima.2011.01.142
Keywords: Improvised explosive device; Template matching; Backstreamed photons; Monte Carlo N-Particle (MCNP).
Depositing User: Nur Farahin Ramli
Date Deposited: 23 Dec 2013 02:38
Last Modified: 26 Aug 2015 04:42
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.nima.2011.01.142
URI: http://psasir.upm.edu.my/id/eprint/23513
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