Scintillation detection with large-area reach-through avalanche photodiodes
Silicon avalanche photodiodes of the ''reachthrough'' type have been used as scintillation detectors with device performance closely approaching that of PMT's. The device consists of a 6X6mm diode with a 5X5mm photosensitive area in a 6.7X6.7X2.0mm package which is suitable for mounting in an array. Typical characteristics at room temperature are: quantum efficiency =50% at lambda=415nm; surface dark current <200nA; bulk dark-current (before gain) <1nA; noise current (at optimum gain of 20 to 50) <1pA/Hz/SUP 1/2/; response time <5ns; capacitance =21pF; biasing voltage =200-400 Volts. When coupled to a NaI(T1) scintillator (9X9X38mm) photo-peak resolutions (FWHM) for 662keV radiation of 10.4% at 21/sup 0/C and 9.8% at 0/sup 0/C were measured. The measured noise equivalent primary charge of one detector at a gain of 50 was 121 electrons (51 electrons rms) at room temperature. The significance of this new detector to high resolution imaging systems and detector arrays is discussed.
- Research Organization:
- RCA Inc., Electro-Optics, Ste-Anne-de-Bellevue, Quebec, H9X 3L3
- OSTI ID:
- 6869738
- Report Number(s):
- CONF-831015-
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. 31:1; Conference: Nuclear science symposium, San Francisco, CA, USA, 19 Oct 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SCINTILLATOR-PHOTODIODE DETECTORS
PERFORMANCE
AVALANCHE QUENCHING
CAPACITANCE
GAIN
KEV RANGE 100-1000
NAI DETECTORS
NOISE
NUMERICAL DATA
PEAKS
PHOTOCATHODES
PHOTOCURRENTS
PHOTODIODES
PHOTOSENSITIVITY
QUANTUM EFFICIENCY
SCINTILLATION COUNTING
SI SEMICONDUCTOR DETECTORS
SPATIAL RESOLUTION
TIMING PROPERTIES
AMPLIFICATION
CATHODES
COUNTING TECHNIQUES
CURRENTS
DATA
EFFICIENCY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRODES
ENERGY RANGE
INFORMATION
KEV RANGE
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
SEMICONDUCTOR DETECTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SENSITIVITY
SOLID SCINTILLATION DETECTORS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments