New types of composite scintillators based on the single crystalline films and crystals of Gd3(Al,Ga)5O12:Ce mixed garnets

被引：7
作者：
Witkiewicz-Lukaszek, Sandra [1 ]
Gorbenko, Vitalii [1 ]
Zorenko, Tetiana [1 ]
Syrotych, Yurii [1 ]
Kucerkova, Romana [2 ]
Mares, Jiri A. [2 ]
Nikl, Martin [2 ]
Sidletskiy, Oleg [3 ]
Fedorov, Alexander [4 ]
Kurosawa, Shunsuke [5 ]
Kamada, Kei [5 ]
Yoshikawa, Akira [4 ]
Zorenko, Yuriy [1 ]
机构：
[1] Kazimierz Wielki Univ Bydgoszcz, Inst Phys, Powstancow Wielkopolskich Str 2, PL-85090 Bydgoszcz, Poland
[2] Acad Sci Czech Republ, Inst Phys, Cukrovarnicka Str 10, Prague 16200, Czech Republic
[3] Natl Acad Sci Ukraine, Inst Scintillat Mat, Av Nauki 60, UA-61001 Kharkiv, Ukraine
[4] Natl Acad Sci Ukraine, SSI Inst Single Crystals, Av Nauki 60, UA-61001 Kharkiv, Ukraine
[5] Tohoku Univ, Inst Mat Res, Aoba Ku, 211 Katahira, Sendai, Miyagi 9808577, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2021年 / 264卷
关键词：
Crystals; Single crystalline films; Liquid phase epitaxy; Scintillators; Garnets; Ce dopant; ENERGY-TRANSFER PROCESSES; LUMINESCENCE; CE3+;
D O I：
10.1016/j.mseb.2020.114909
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This work presents the results of creation of novel composite scintillators based on the Gd3Al5-xGaxO12:Ce (x = 1.16-2.67) single crystalline films (SCF), grown by the LPE method onto Gd3Al2.5Ga2.5O12:Ce single crystal (SC) substrates. The scintillation properties of film/crystal epitaxial structures were investigated under alpha-particle and gamma-quantum excitations. Under alpha-particle excitation, the light yield of mentioned SCF scintillators is significantly less than that in their substrates due to the influence of Pb2+ flux contamination and formation of Pb2+-Ce4+ centers. Meanwhile, these SCF scintillators under alpha-excitation possess significantly faster decay kinetics than that of their substrates under gamma-excitation. Therefore, the Gd3Al5-xGaxO12:Ce SCFs (x = 1.16-2.67)/Gd(3)Al(2.5)G(2)(.5)O(12): Ce SC epitaxial structures can be used as composite scintillators for simultaneous registration of the components of mixed ionizing fluxes, specifically for detection of alpha-particles (SCF) and gamma-quanta (substrate). The separation of the response from the SCF and substrate parts of composite scintillators under alpha-particle (Am-241) and gamma-quantum (Cs-132) excitations occurs at large t(gamma)/t(alpha) = 1.7-4.2 ratio.
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页数：9
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