DocumentCode
1057692
Title
Detector optimization for hand-held CsI(Tl)/HgI2 gamma-ray scintillation spectrometer applications
Author
Wang, Y.J. ; Patt, B.E. ; Iwanczyk, J.S. ; Cherry, S.R. ; Shao, Y.
Author_Institution
Xsirius Inc., Camarillo, CA, USA
Volume
43
Issue
3
fYear
1996
fDate
6/1/1996 12:00:00 AM
Firstpage
1277
Lastpage
1281
Abstract
Gamma-ray spectrometers using mercuric iodide (HgI2) photodetectors (PDs) coupled with CsI(Tl) scintillators have shown excellent energy resolutions and high detection efficiency at room temperature. Additionally HgI2 semiconductor PDs allow for extreme miniaturization of the detector packaging compared with photomultiplier tube (PMT) based detectors. These advantages make possible the construction of a new generation of hand-held gamma-ray spectrometers. Studies of detector optimization for this application have been undertaken. Several contact materials including hydrogel and semi-transparent metal films have been evaluated and compared for their performances and long term stability. In order to provide higher gamma-ray detection efficiency (i.e. larger scintillator volume), but without causing significant degradation of the excellent response achieved with the matched scintillator/PD interface, the scintillator/PD configuration has been studied. A Monte Carlo simulation model has been developed so that the spectral shape can be predicted for various scintillator shapes and surface treatments
Keywords
gamma-ray detection; semiconductor counters; solid scintillation detectors; CsI(Tl); HgI2; HgI2 photodetectors; HgI2 semiconductor PDs; Monte Carlo simulation model; detection efficiency; detector optimization; detector packaging; energy resolutions; extreme miniaturization; hand-held CsI(Tl)/HgI2 gamma-ray scintillation spectrometer; hydrogel; long term stability; matched scintillator/PD interface; scintillator shapes; scintillator volume; scintillator/PD configuration; semi-transparent metal films; spectral shape; surface treatments; Energy resolution; Gamma ray detection; Gamma ray detectors; Inorganic materials; Photodetectors; Photomultipliers; Semiconductor device packaging; Semiconductor materials; Spectroscopy; Temperature;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/23.506677
Filename
506677
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