Development of a Compton imager based on bars of scintillator

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DOIResolve DOI: http://doi.org/10.1016/j.nima.2014.08.012
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TypeArticle
Journal titleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ISSN0168-9002
Volume767
Pages397406; # of pages: 10
SubjectCompton imaging; Compton telescope; Pulse-height sharing; Radiation detection; Security; Scintillator
AbstractWe have developed a compact Compton gamma-ray imager with a large field of view and a low channel-count that is capable of quickly localizing gamma-ray sources in the few hundred keV - several MeV range. The two detector planes (scatter and absorber) employ bars of NaI(Tl) read out by photomultiplier tubes (PMTs) located at each end. The long-range imaging performance has been tested from 392 keV to 1274 keV. An angular resolution measure of 2.72±0.06° and an efficiency of (1.79±0.04)×10-³ at 662 keV is obtained. A ¹³⁷Cs (662 keV) source equivalent to a 10 mCi source 40 m away can be located in 60 s with an uncertainty of about a degree. No significant degradation in imaging performance is observed for source angles up to 40° off axis.
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21272615
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Record identifier8a54282b-cc66-40fa-8214-a045cbe9bebd
Record created2014-12-03
Record modified2016-05-09
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