Luminescence and scintillation properties of Gd3Sc2(Al3-xGax)O12:Ce (x=1, 2, 3) garnet crystals

被引：16

作者：

Chewpraditkul, Warut ^{[1
]}

Pattanaboonmee, Nakarin ^{[1
]}

Chewpraditkul, Weerapong ^{[1
]}

Sakthong, Ongsa ^{[1
]}

Kim, Kyoung Jin ^{[2
]}

Yoshino, Masao ^{[2
]}

Horiai, Takahito ^{[2
]}

Kurosawa, Shunsuke ^{[2
]}

Yoshikawa, Akira ^{[2
,3
]}

Kamada, Kei ^{[3
]}

Drozdowski, Winicjusz ^{[4
]}

Witkowski, Marcin E. ^{[4
]}

Makowski, Michal ^{[4
]}

Kucerkova, Romana ^{[5
]}

Nikl, Martin ^{[5
]}

机构：

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

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[3] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

[4] Nicolaus Copernicus Univ Torun, Fac Phys Astron & Informat, Inst Phys, PL-87100 Torun, Poland

[5] AS CR, Inst Phys, Prague 16253, Czech Republic

来源：

RADIATION PHYSICS AND CHEMISTRY | 2021年 / 187卷

关键词：

Garnet crystal; Gd3Sc2(Al3-xGax)O-12:Ce; Light yield; Luminescence; Scintillation; LOW-TEMPERATURE THERMOLUMINESCENCE; SINGLE-CRYSTALS; CE3+; GROWTH; GA; AL;

D O I：

10.1016/j.radphyschem.2021.109559

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 characteristics of Ce3+ - doped Gd3Sc2(Al3-xGax)O-12 (x = 1, 2, 3) garnet crystals were investigated. The Ce3+ luminescence was blue-shifted with increasing Ga content due to the decrease of the crystal field strength. A decrease of Ce3+ luminescence intensity and luminescence decay time at high temperature was observed for all samples due to thermal ionization of the Ce3+ 5d(1) excited levels. With increasing Ga content the decrease of thermal activation energies, determined from temperature dependence of decay times, was obtained. Both Gd3Sc2Al2GaO12:Ce and Gd3Sc2AlGa2O12:Ce samples exhibited a comparable light yield (LY) value of 24,000 photons/MeV while the latter sample showed faster scintillation decay time of 12 ns (11%) + 56 ns (89%) with respect to those of 55 ns (28%) + 105 ns (72%) for the former sample. An acceleration of scintillation decay time with an expense of LY value was also obtained for the Mg2+-codoped sample. At low temperature a decrease of scintillation yield was observed in correlation with the intense thermoluminescence peaks, attributing to the localization of electrons at intrinsic shallow traps.

引用

页数：6

共 33 条

[1] Effect of Mg2+ co-doping on the photo- and thermally stimulated luminescence of the (Lu,Gd)3(Ga,Al)5O12:Ce epitaxial films [J].