NDLI: Development of Compact Wide-Angle Imaging Detector for MeV Gamma-Rays using Stacked BGO Scintillator Rods

Content Provider	IEEE Xplore Digital Library
Author	Watanabe, K. Mihoya, S. Kawarabayashi, J. Iguchi, T.
Copyright Year	2006
Description	Author affiliation: Dept. of Quantum Eng., Nagoya Univ. (Watanabe, K.; Mihoya, S.; Kawarabayashi, J.; Iguchi, T.)
Abstract	We are developing a compact wide-angle imaging detector for MeV gamma-rays using stacked BGO scintillator rods to apply to neutron induced prompt gamma-ray analysis (NPGA), which is one of the promising methods for non-destructive detection of hidden explosives by measuring characteristic gamma-rays produced from chemical elements. The gamma-ray imaging in NPGA applications is also necessary to locate them and improve the signal-to-noise ratio. A compact wide-angle imaging detector has an advantage in detection efficiency, because it can take images at short distance from inspection objects. For a compact wide-angle imaging detector for MeV gamma-rays, we have proposed the image reconstruction technique based on the statistical estimation algorithm using stacked BGO scintillator rods that can get information on energies and 3D positions. In this paper, we mainly discussed an information processing method for recorded signals especially to provide the additional function rejecting pile-up events, which makes our detector possible to operate in high dose filed. Through the EGS4 simulations modeling our detector units, we successfully demonstrated that the pile-up events can be suppressed by picking out only events with small spatial deviation of scintillation positions. In addition, we experimentally demonstrated nitrogen imaging based on NPGA using our gamma-ray detector.
Starting Page	253
Ending Page	256
File Size	4278051
Page Count	4
File Format	PDF
ISBN	1424405602
ISSN	10957863
DOI	10.1109/NSSMIC.2006.356150
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical imaging Gamma ray detection Gamma ray detectors Object detection Event detection Solid scintillation detectors Neutrons Chemical analysis Image analysis Explosives
Content Type	Text
Resource Type	Article

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