Neutron-gamma discrimination via PSD plastic scintillator and SiPMs

The reduction in availability and inevitable increase in cost of traditional neutron detectors based on the 3He neutron capture reaction has resulted in a concerted effort to seek out new techniques and detection media to meet the needs of national nuclear security. Traditionally, the alternative ha...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-10, Vol.763 (1), p.12007
Main Authors: Taggart, M P, Payne, C, Sellin, P J
Format: Article
Language:English
Subjects:
Discrimination
Figure of merit
Gamma rays
Neutron counters
Neutrons
Nuclear capture
Nuclear safety
Photomultiplier tubes
Physics
Pulse shape
Scintillation counters
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Summary:The reduction in availability and inevitable increase in cost of traditional neutron detectors based on the 3He neutron capture reaction has resulted in a concerted effort to seek out new techniques and detection media to meet the needs of national nuclear security. Traditionally, the alternative has been provided through pulse shape discrimination (PSD) using liquid scintillators. However, these are not without their own inherent issues, primarily concerning user safety and ongoing maintenance. A potential system devised to separate neutron and gamma ray pulses utilising the PSD technique takes advantage of recent improvements in silicon photomultiplier (SiPM) technology and the development of plastic scintillators exhibiting the PSD phenomena. In this paper we present the current iteration of this ongoing work having achieved a Figure of Merit (FoM) of 1.39 at 1.5 MeVee.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/763/1/012007