Pulse shape discrimination performance of a pixelated plastic scintillator (EJ-299-34) for a coded-aperture based dual particle imaging system

被引：4
作者：
Cieslak, M. J. [1 ]
Gamage, K. A. A. [2 ]
Glover, R. [3 ]
Taylor, C. J. [1 ]
机构：
[1] Univ Lancaster, Dept Engn, Lancaster LA1 4YW, England
[2] Univ Glasgow, Sch Engn, Glasgow G12 8QQ, Lanark, Scotland
[3] Sellafield Ltd, Radiometr Syst Grp, Seascale CA20 1PG, England
来源：
JOURNAL OF INSTRUMENTATION | 2019年 / 14卷 / 07期
基金：
英国工程与自然科学研究理事会;
关键词：
Gamma detectors (scintillators; CZT; HPG; HgI etc); Neutron detectors (cold; thermal; fast neutrons); Particle identification methods; Scintillators; scintillation and light emission processes (solid; gas and liquid scintillators); GAMMA-RAY; LIQUID SCINTILLATOR; NEUTRON; DETECTOR;
D O I：
10.1088/1748-0221/14/07/P07017
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The pulse shape discrimination performance of a pixelated organic plastic scintillator has been investigated. The scintillator has been built using 169 plastic scintillator blocks (arranged into a 13 x 13 square array) of 2.8 x 2.8 x 15 mm(3) each. The scintillator was coupled with a single-channel photomultiplier tube. The scintillator was exposed to a mixed-field environment provided by Cf-252 and its pulse shape discrimination capabilities are presented in this paper. Initial results revealed that a 150 MS/s digitising system was insufficient to separate neutrons from gamma-ray photons. Therefore, the experiment was repeated with a 500 MS/s system, which provided improved pulse shape discrimination performance. In order to validate the performance of the pixelated plastic scintillator, it was compared to that of a cylindrical plastic sample. Tests were also carried out in moderated neutron and gamma-ray fields of Cf-252. The results indicate that acceptable levels of pulse shape discrimination are obtained for the case of a pixelated scintillator, when the higher sampling rate digitiser was used.
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页数：16
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