Mercuric iodide photodetectors for scintillation spectroscopy

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6416379

Markakis, J; Ortale, C; Schnepple, W; Iwanczyk, J; Dabrowski, A

We have measured the responses to /sup 137/Cs (662 keV) of both a 1-inch-diam by 2-inch-thick NaI(Tl) scintillator optically coupled to a 1-inch-diam by 800-..mu..m-thick mercuric iodide (HgI/sub 2/) photodetector, and a 1-cm-diam by 1-cm-thick CaWO/sub 4/ scintillator coupled to a 1.3-cm-diam by 600-..mu..m-thick HgI/sub 2/ photodetector. Best spectral resolution to /sup 137/Cs was 7.8% FWHM for the NaI(Tl)-HgI/sub 2/ and 12.5% FWHM for the CaWO/sub 4/-HgI/sub 2/ detectors; peak-to-valley ratios were 26:1 and 16:1, respectively. HgI/sub 2/ 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.

• Research Organization: EG and G, Inc., Goleta, CA (USA). Energy Measurements Group; University of Southern California, Marina Del Rey (USA). Inst. for Physics and Imaging Science
• DOE Contract Number: AC08-83NV10282
• OSTI ID: 6416379
• Report Number(s): DOE/NV/10282-2038; CONF-841007-6; ON: DE85001437
• Country of Publication: United States
• Language: English

Related Subjects

440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
EFFICIENCY
GAMMA SPECTROSCOPY
HGI2 SEMICONDUCTOR DETECTORS
MEASURING INSTRUMENTS
QUANTUM EFFICIENCY
RADIATION DETECTORS
SCINTILLATIONS
SEMICONDUCTOR DETECTORS
SPECTRAL RESPONSE
SPECTROSCOPY