1. Temperature dependence of photo- and radio-luminescence and scintillation properties of Lu2YAl2.5Ga2.5O12:Ce,Mg multicomponent garnet crystals.
- Author
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Chewpraditkul, Warut, Horiai, Takahiko, Beitlerova, Alena, Kucerkova, Romana, Babin, Vladimir, Yoshikawa, Akira, Chewpraditkul, Weerapong, and Nikl, Martin
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GARNET , *SCINTILLATORS , *LUMINESCENCE quenching , *CRYSTALS , *RADIOLUMINESCENCE , *THERMOLUMINESCENCE , *LUMINESCENCE - Abstract
Luminescence and scintillation properties of Lu 2 YAl 2.5 Ga 2.5 O 12 :Ce,Mg (0.02, 0.05 %) garnet crystals grown by the micro-pulling down method were investigated. The onset temperature for luminescence quenching at ∼365 K is determined from the temperature dependence of photoluminescence decay time. At room temperature, the Mg (0.05 %) sample exhibits high integral scintillation efficiency of ∼445 % of BGO crystal, light yield value of 23,500 photons/MeV, and fast scintillation decay times of 20 ns (15 %) + 54 ns (85 %). The higher radioluminescence intensity of the Mg (0.05 %) sample correlates with an appearance of its lower themally-stimulated luminescence intensity in 77–500 K range. • Luminescence and scintillation properties of Lu 2 YAl 2.5 Ga 2.5 O 12 :Ce,Mg (Mg = 0.02 %, 0.05 %) crystals are investigated. • Both crystals show onset of luminescence quenching at 365 K. • Lu 2 YAl 2.5 Ga 2.5 O 12 :Ce,0.05%Mg shows light yield of 23,500 photons/MeV. • Lu 2 YAl 2.5 Ga 2.5 O 12 :Ce,0.05%Mg shows scintillation decay time of 20 ns (14 %) + 54 ns (86 %). • Thermoluminescence characteristics are investigated. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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