Luminescence and scintillation properties of Gd3(Al5-xScx)O12:Ce garnet crystals grown by floating zone method

被引：6

作者：

Chewpraditkul, Warut ^{[1
]}

Kantuptim, Prom ^{[2
]}

Witkowski, Marcin E. ^{[3
]}

Makowski, Michal ^{[3
]}

Drozdowski, Winicjusz ^{[3
]}

Chewpraditkul, Weerapong ^{[1
]}

Yanagida, Takayuki ^{[2
]}

机构：

[1] King Mongkuts Univ Technol Thonburi, Fac Sci, Dept Phys, Bangkok 10140, Thailand

[2] Nara Inst Sci & Technol, Div Mat Sci, 8916-5 Ikoma, Nara 6300192, Japan

[3] Nicolaus Copernicus Univ Torun, Inst Phys, Fac Phys Astron & Informat, Ul Grudziadzka 5, PL-87100 Torun, Poland

来源：

RADIATION PHYSICS AND CHEMISTRY | 2023年 / 208卷

关键词：

Garnet crystal; Gd 3 (Al 3-x Sc x )O 12; Ce; Luminescence; Scintillation; Thermoluminescence; POWER-LAW DECAY; OPTICAL-PROPERTIES; SINGLE-CRYSTAL; PHOSPHORS; TEMPERATURE; TRAPS;

D O I：

10.1016/j.radphyschem.2023.110951

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The luminescence and scintillation properties of Ce3+-doped Gd3(Al5-xScx)O12 (x = 1, 1.5, 2, 2.5, 3) garnet crystals grown by the floating zone method were investigated. With increasing Sc content, the Ce3+ 5d1 -> 4f luminescence was blue shifted due to a decrease in 5d1-5d2 crystal field splitting (Delta 12) of the 5de doublet state. The Sc content showed a strong influence on purity of garnet phase in the Gd3(Al5-xScx)O12:Ce crystals. The presence of secondary phase (perovskite and/or alpha-Al2O3) results to a poor transparency and a lower light yield (LY) value. The Gd3Al3Sc2O12:Ce crystal exhibited pure garnet phase, highest quantum yield (-76 %) and transmittance (-80 %), and highest LY value (6,850 photons/MeV at 662 keV gamma rays) among the studied samples. Above RT, a decrease of radioluminescence (RL) yield occurs for all samples due to the thermal ionization process. A decrease of the RL yield at low temperature observed in correlation with the intense thermoluminescence peaks can be explained by the localization of electrons at intrinsic shallow traps.

引用

页数：7

共 44 条

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