Photostimulated luminescence and thermoluminescence of LSO scintillators

Conference · Mon Aug 01 04:00:00 EDT 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6884505

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

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

Photostimulated luminescence (PSL) and thermoluminescence (TL) from five Lu[sub 2(1[minus]x)]Ce[sub 2x](SiO[sub 4])O (LSO) crystals with different light outputs is reported. Optical irradiation into the Ce[sup 3+] absorption bands causes the appearance of a broad absorption band near 280 nm which is ascribed to Ce[sup 4+]. In addition, a tail is observed extending beyond 700 nm. Optical irradiation into this tail (PSL) or heating of the crystal (TL) results in Ce[sup 3+] emission. It is shown that both PSL and TL are due to the same traps. In addition, an anti-correlation is found between the light output under gamma-ray irradiation and the trap concentration in the crystal. The nature of the recombination centers responsible for the low light output in some crystals is not clear. Annealing experiments suggest that the traps and the recombination center may be related to oxygen vacancies.

• OSTI ID: 6884505
• Report Number(s): CONF-931051--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 41:4Pt1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
440100* -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CERIUM COMPOUNDS
CERIUM OXIDES
CERIUM SILICATES
CHALCOGENIDES
DATA
DOPED MATERIALS
ENERGY TRANSFER
EXPERIMENTAL DATA
INFORMATION
INORGANIC PHOSPHORS
LUMINESCENCE
LUTETIUM COMPOUNDS
LUTETIUM OXIDES
LUTETIUM SILICATES
MATERIALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOSPHORS
RARE EARTH COMPOUNDS
SILICATES
SILICON COMPOUNDS