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

Cieslak, Michal and Akurugoda Gamage, Kelum and Glover, Robert (2017) Investigation into a suitable scintillator and coded-aperture material for a mixed-field radiation imaging system. Journal of Instrumentation, 12 (12). ISSN 1748-0221

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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:
Journal Article
Journal or Publication Title:
Journal of Instrumentation
Additional Information:
This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Instrumentation. IOP Publishing Ltd 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 doi: 10.1088/1748-0221/12/12/P12007
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2600/2610
Subjects:
ID Code:
88830
Deposited By:
Deposited On:
20 Nov 2017 21:30
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Sep 2020 03:34