Energy transfer mechanism in Gd[sub 2](SiO[sub 4])O:Ce scintillators

Conference · Mon Aug 01 00:00:00 EDT 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6974899

Suzuki, H; Tombrello, T A ^[1]; Melcher, C L; Schweitzer, J S ^[2]

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1. California Inst. of Technology, Pasadena, CA (United States). Division of Physics
2. Schlumberger-Doll Research, Ridgefield, CT (United States)

Gadolinium oxyorthosilicate Gd[sub 2](SiO[sub 4])O has a high density (6.7 g/cm[sup 3]) and a high effective atomic number (59) for the efficient detection of x- and [gamma]-radiation. The scintillation decay of cerium-doped gadolinium oxyorthosilicate Gd[sub 2](SiO[sub 4])O:Ce is lengthened by the energy transfer from Gd to Ce. To investigate the role of the Gd in the scintillation processes, the Gd was partially replaced by optically inactive rare earth elements, Y and Lu, and the effective transfer rates from Gd to Ce were measured as a function of Gd and Ce concentrations using UV- and gamma-ray excitations. The data clearly indicate the dilution of the Gd by the Y and the Lu further lengthens the migration time through the Gd in the energy transfer process from Gd to Ce.

• OSTI ID: 6974899
• Report Number(s): CONF-931051-; CODEN: IETNAE; TRN: 94-023023
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 41:4Pt1; Conference: NSS-MIC '93: nuclear science symposium and medical imaging conference, San Francisco, CA (United States), 30 Oct - 6 Nov 1993; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
36 MATERIALS SCIENCE
GADOLINIUM COMPOUNDS
LUMINESCENCE
GAMMA DETECTION
SCINTILLATION COUNTERS
INORGANIC PHOSPHORS
ENERGY TRANSFER
MATERIALS
SILICATES
X-RAY DETECTION
DOPED MATERIALS
DETECTION
MEASURING INSTRUMENTS
OXYGEN COMPOUNDS
PHOSPHORS
RADIATION DETECTION
RADIATION DETECTORS
RARE EARTH COMPOUNDS
SILICON COMPOUNDS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
360606 - Other Materials- Physical Properties- (1992-)