Scintillation properties of GSO

Conference · Sun Apr 01 04:00:00 EDT 1990 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)

OSTI ID:6612627

Melcher, C L; Schweitzer, J S ^[1]; Utsu, T; Akiyama, S ^[2]

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1. Schlumberger-Doll Research, Ridgefield, CT (US)
2. Hitachi Chemical Co. Ltd., Tokyo (Japan)

The timing properties of Gd{sub 2}SiO{sub 5}:Ce (GSO) single crystal scintillators have previously been evaluated for positron emission tomography applications. The measured time resolution, however, was worse than expected from calculations based on photoelectron yield and a 60 nanosecond exponential decay constant, leading us to further investigate GSO's basic properties. With a time-correlated-single-photon technique, the authors have found two decay components, one of 56 ns and one of 600 ns, the latter containing 10--15% of the total scintillation output. This may explain the difference between the experimental and theoretical time resolutions and confirms a previous hypothesis of a long decay component. In addition, the authors have found that each component's decay constant strongly depends on the cerium concentration. The primary component varies from {approximately} 20 ns to {approximately} 190 ns and the secondary component varies from {approximately} 70 ns to {approximately} 1200 ns as the cerium concentration is varied from 5.0 mol% to 0.1 mol%.

• OSTI ID: 6612627
• Report Number(s): CONF-900143--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) Journal Volume: 37:2
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550602 -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
CERIUM
CHALCOGENIDES
CHEMICAL COMPOSITION
COMPUTERIZED TOMOGRAPHY
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DECAY
DIAGNOSTIC TECHNIQUES
ELEMENTS
EMISSION COMPUTED TOMOGRAPHY
GADOLINIUM
MEASURING INSTRUMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RARE EARTHS
SCINTILLATIONS
SEMICONDUCTOR DETECTORS
SI SEMICONDUCTOR DETECTORS
SILICON COMPOUNDS
SILICON OXIDES
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
TOMOGRAPHY