Journal of Nuclear Energy Science & Power Generation TechnologyISSN: 2325-9809

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Research Article, J Nucl Ene Sci Power Generat Technol Vol: 2 Issue: 3

Detection and Identification of Contraband in Air Cargo Containers Using Neutron Based Techniques

Ahmad M Osman1*, Ashraf S Abd-elrhman2, II Bashter3 and RM Megahid1
1Laboratories for Detection of Landmines and Illicit Materials, Reactor Physics
Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Egypt
2Higher Technological Institute, Ramadan Tenth City, Cairo, Egypt
3Department of Physics, Faculty of Science, Zagazig University, Cairo, Egypt
Corresponding author : Ahmad M Osman
Laboratories for Detection of Landmines and Illicit Materials, Reactor Physics Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Post Office 13759, Egypt
E-mail: [email protected]
Received: March 25, 2013 Accepted: August 12, 2013 Published: August 18, 2013
Citation: Osman AM, Abd-elrhman AS, Bashter II, Megahid RM (2013) Detection and Identification of Contraband in Air Cargo Containers Using Neutron Based Techniques. J Nucl Ene Sci Power Generat Technol 2:3. doi:10.4172/2325-9809.1000114

Abstract

Detection and Identification of Contraband in Air Cargo Containers Using Neutron Based Techniques

This paper describes and discusses the combined system which was installed to allocate and identify contraband materials hidden in air cargo containers by fast neutron radiography and neutron elemental analysis techniques. A slit of fan beam of fast neutrons emitted from Pu-Be source was used. The fast neutron fluxes passed through different lines crossing the hidden object were detected by a neutron spectrometer applies stilbene scintillator and pulse shape method to discriminate agnist undesired pulses of gamma-rays. A two channel spectroscopy method was used to eleminate the effect of spectrum shift caused by the benign materials surrounding the hidden object. The recognetion of the allocated suspected object was performed by measuring the gamma-ray spectrum emitted from the suspected object by a gamma spectrometer with NaI(Tl) detector fixed at the middle point of the container and at a vertical plane to the incident beam. Tests were carried out using 2.5 kg of RDX explosive material hidden withen materials of pasta, onion and ceramic tiles. The results of fast neutron radiography are presented in the form of attenuation relation profiles and 2D constructed images. The measured spectra of emitted gammarays were used to determine the energy and intensity of gamma lines emitted from different elemental constituent of the suspected object. The analysis of the constructed images and gamma-ray spectra obtained for different tests indicated the reliability and capability of the installed combined system for inspection of small and medsize containers for illicit traficking.

Keywords: Neutron imaging; Neutron activation analysis; Explosive detection; Air cargo inspection

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