Characterisation of a pixelated plastic scintillator for a coded aperture neutron/gamma imaging system

Cieslak, M.J. and Gamage, K.A.A. (2019) Characterisation of a pixelated plastic scintillator for a coded aperture neutron/gamma imaging system. In: 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings. IEEE. ISBN 9781538684948

[img]
Text (AAManuscript)
AAManuscript.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial.

Download (518kB)

Abstract

This paper experimentally investigates, the suitability of an organic pixelated plastic scintillator for a coded aperture neutron/gamma imaging system. The scintillator used in this study has been designed as a small scaled detector with an individual pixel size of 2.8 mm × 2.8 mm × 15 mm. Individual blocks of the scintillator have been separated from one another with ESR TM reflector foil to provide over 70% of optical isolation between pixels. Individual scintillator cells are arranged into 13×13 array with overall dimension of 39.52 mm × 39.52 mm. In this study the scintillator was attached to a single channel photomultiplier tube to assess its pulse shape discrimination capabilities. Initially the scintillator was irradiated with 137Cs gamma-ray source, and gamma-ray pulses were benchmarked with respect to a mathematical model. The detector was then irradiated with a spontaneous fission source, 252 Cf, and preliminary results suggested good pulse shape discrimination potential of the scintillator. It is believed, that it is the first time a small scale pixelated organic plastic scintillator has been tested in context of PSD capabilities for a coded aperture neutron/gamma imaging system.

Item Type:
Contribution in Book/Report/Proceedings
Additional Information:
©2018 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
ID Code:
138211
Deposited By:
Deposited On:
30 Oct 2019 09:15
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Oct 2020 04:54