DocumentCode
906498
Title
Mercuric Iodide Photodetectors for Scintillation Spectroscopy
Author
Markakis, J. ; Ortale, C. ; Schnepple, W. ; Iwanczyk, J. ; Dabrowski, A.
Author_Institution
EG&G Energy Measurements, Inc. Santa Barbara Operations 130 Robin Hill Road Goleta, California 93117
Volume
32
Issue
1
fYear
1985
Firstpage
559
Lastpage
562
Abstract
We have measured the responses to 137Cs (662 keV) of both a 1-inch-diam by 2-inch-thick NaI(Tl) scintillator optically coupled to a 1-inch-diam by 800-¿m-thick mercuric iodide (HgI2) photodetector, and a 1-cm-diam by 1-cm-thick CaWO4 scintillator coupled to a 1.3-cm-diam by 600-¿m-thick HgI2 photodetector. Best spectral resolution to 137Cs was 7.8% FWHM for the NaI(Tl)-HgI2 and 12.5% FWHM for the CaWO4-HgI2 detectors; peak-to-valley ratios were 26:1 and 16:1, respectively. HgI2 detectors operate at room temperature and their use in scintillation spectroscopy presents the ultimate miniaturization of scintillation detectors, limited mainly by the size of the scintillation crystal.
Keywords
Crystals; Gamma ray detection; Gamma ray detectors; Optical coupling; Photodetectors; Radiation detectors; Solid scintillation detectors; Solid state circuits; Spectroscopy; Temperature;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1985.4336895
Filename
4336895
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