Investigation into a suitable scintillator and coded-aperture material for a mixed-field radiation imaging system

Cieślak, M.J., Gamage, K.A.A. and Glover, R. (2017) Investigation into a suitable scintillator and coded-aperture material for a mixed-field radiation imaging system. Journal of Instrumentation, 12(12), P12007. (doi: 10.1088/1748-0221/12/12/P12007)

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Abstract

Monte-Carlo modelling (MCNPX) methods have been employed to conduct an investigation into a suitable scintillator and coded-aperture material for a scintillator based mixed-field radiation imaging system. Single stilbene crystal, pure and 6Li-loaded plastic scintillators were simulated and their neutron/gamma detection performance compared when exposed to the spontaneous fission spectrum produced by 252Cf. The most suitable candidate was then incorporated into a scintillator based mixed-field coded-aperture imaging system. Coded-aperture models made of three W and 113Cd compositions were tested in different neutron/gamma environments with a square W collimator modelled around the aperture. Each simulation involved recording the interactions of neutron events in organic solid scintillator, whose neutron/gamma detection performance was assessed prior to the coded-aperture material investigation. Three coded-aperture material compositions have been tested with the simulated 252Cf spontaneous fission as well as 241AmBe neutron sources. Results generally claim very good detection sensitivity and spatial resolution for the radioactive sources located in the centre of the aperture.

Item Type:Articles
Additional Information:The authors would like to acknowledge the funding support from EPSRC (grant number EP/M507891/1) via Faculty of Science and Technology, Lancaster University, U.K. and Sellafield Ltd.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gamage, Professor Kelum
Authors: Cieślak, M.J., Gamage, K.A.A., and Glover, R.
College/School:College of Science and Engineering > School of Engineering
Journal Name:Journal of Instrumentation
Publisher:Institute of Physics Publishing Ltd.
ISSN:1748-0221
ISSN (Online):1748-0221
Published Online:06 December 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Journal of Instrumentation 12(12): P12007
Publisher Policy:Reproduced under a Creative Commons License

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