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Proceedings Paper

Neutron detectors based on CMOS solid state photomultipliers
Author(s): Radia Sia; James F. Christian; Christopher J. Stapels; Thomas Prettyman; Michael R. Squillante
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Paper Abstract

CMOS solid-state photomultipliers (CMOS-SSPM) are new, potentially very inexpensive, photodetectors that have the promise of supplanting photomultiplier tubes and standard photodiodes for many nuclear radiation detection measurements using scintillator crystals. The compact size and very high gain make SSPMs attractive for use in applications where photomultiplier tubes cannot be used and standard photodiodes have insufficient sensitivity. In this effort, the use of SSPMs was investigated for the detection of neutrons with the goal of designing a detector for portable systems that has the capability of discriminating neutrons from gamma rays. The neutron scintillation signatures were measured using boron-loaded plastic scintillators. Our detector concept design incorporates a dual-scintillator design with both a neutrons sensitive organic scintillator (a boron-loaded gel) and a gamma ray sensitive inorganic scintillator (LYSO). Using this design, the gamma ray signal is suppressed and the neutron events are clearly resolved. The design was modeled to optimize the detection efficiency for both thermal and energetic neutrons. In addition, the detection of thermal neutrons in the presence of gamma rays was examined using the SSPM coupled to Cs2LiYCl6:Ce scintillator (CLYC).

Paper Details

Date Published: 3 September 2008
PDF: 9 pages
Proc. SPIE 7080, Penetrating Radiation Systems and Applications IX, 70800G (3 September 2008); doi: 10.1117/12.800757
Show Author Affiliations
Radia Sia, Radiation Monitoring Devices, Inc. (United States)
James F. Christian, Radiation Monitoring Devices, Inc. (United States)
Christopher J. Stapels, Radiation Monitoring Devices, Inc. (United States)
Thomas Prettyman, The Planetary Science Institute (United States)
Michael R. Squillante, Radiation Monitoring Devices, Inc. (United States)

Published in SPIE Proceedings Vol. 7080:
Penetrating Radiation Systems and Applications IX
F. Patrick Doty; H. Bradford Barber; Hans Roehrig; Richard C Schirato, Editor(s)

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