Performance characteristics of BGO-silicon avalanche photodiode detectors for PET

Conference · Fri Feb 01 04:00:00 EST 1985 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:5083990

Lecomte, R; Lightstone, A W; McIntyre, R J; Schmitt, D

Spectroscopic and timing characteristics of a gammaray detector based on silicon avalanche photodiodes (APD) and bismuth germanate (BGO) scintillators are reported. The APD used in this work is a large area (25 mm/sup 2/) device of the ''reach through'' type having a quantum efficiency of 70% at 480 nm. When coupled to a 5X5X3 mm/sup 3/ BGO crystal, its spectroscopic performance is found to be superior to that of a PMT coupled to the same crystal, owing largely to its higher quantum efficiency. At room temperature, the APD achieves better energy resolution than any other (unity gain) solid state photodetector currently available; at -15 /sup 0/C, its spectroscopic performance is comparable to that of large area p-i-n photodiodes at -150 /sup 0/C. Preliminary measurements show that the timing performance of the new detector allows it to be used for both energy and coincidence discrimination in positron emission tomography (PET). Results obtained with a realistic BGO crystal shape and size for PET are also presented. Limitations and possible improvements are discussed.

• Research Organization: Univ. of Sherbrooke, Quebec
• OSTI ID: 5083990
• Report Number(s): CONF-841006-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-32:1
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BGO DETECTORS
COMPUTERIZED TOMOGRAPHY
DETECTION
DIAGNOSTIC TECHNIQUES
EFFICIENCY
EMISSION COMPUTED TOMOGRAPHY
ENERGY RESOLUTION
GAMMA DETECTION
GAMMA SPECTROMETERS
JUNCTIONS
MEASURING INSTRUMENTS
P-N JUNCTIONS
PERFORMANCE
PHOTODIODES
POSITRON COMPUTED TOMOGRAPHY
QUANTUM EFFICIENCY
RADIATION DETECTION
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
SCINTILLATOR-PHOTODIODE DETECTORS
SEMICONDUCTOR DETECTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR JUNCTIONS
SI SEMICONDUCTOR DETECTORS
SOLID SCINTILLATION DETECTORS
SPATIAL RESOLUTION
SPECTROMETERS
TIME RESOLUTION
TIMING PROPERTIES
TOMOGRAPHY