Temperature dependence of photoluminescence kinetics, scintillation properties, and coincidence time resolution of Mo co-doped Y1.5Gd1.5Al2Ga3O12:Ce (Mo = 0, 300, 600 ppm) multicomponent garnet crystals

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-11-26 DOI:10.1016/j.optmat.2024.116494

Warut Chewpraditkul , Ongsa Sakthong , Weerapong Chewpraditkul , Masao Yoshino , Takahiko Horiai , Shunsuke Kurosawa , Romana Kucerkova , Alena Beitlerova , Tomasz Szczesniak , Martyna Grodzicka-Kobyłka , Martin Nikl , Akira Yoshikawa

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Abstract

Luminescence and scintillation properties of Mo co-doped Y_1.5Gd_1.5Al₂Ga₃O₁₂:Ce,Mo (Mo = 0, 300, 600 ppm) multicomponent garnet crystals grown by the micro-pulling-down method were investigated. To investigate temperature stability, temperature dependence of photoluminescence decay time was measured from 77 to 487 K and thermal activation energy was determined. Y_1.5Gd_1.5Al₂Ga₃O₁₂:Ce,Mo (300, 600 ppm) samples showed faster scintillation decay time with a similar LY value compared to Mo-free Y_1.5Gd_1.5Al₂Ga₃O₁₂:Ce one. Y_1.5Gd_1.5Al₂Ga₃O₁₂:Ce,Mo (600 ppm) showed a light yield value of 34,300 photons/MeV along with fast scintillation decay times of 45.2 ns (55 %) +153 ns (45 %) and time resolution of 313 ps. Radioluminescence and afterglow signal were also measured at RT and discussed.

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Mo共掺杂Y1.5Gd1.5Al2Ga3O12:Ce （Mo = 0,300, 600 ppm）多组分石榴石晶体光致发光动力学、闪烁特性和符合时间分辨率的温度依赖性

研究了Mo共掺杂Y1.5Gd1.5Al2Ga3O12:Ce,Mo （Mo = 0、300、600 ppm）多组分石榴石晶体微拉下生长的发光和闪烁特性。为了研究温度稳定性，在77 ~ 487 K范围内测量了光致发光衰减时间的温度依赖性，并测定了热活化能。Y1.5Gd1.5Al2Ga3O12:Ce,Mo （300,600 ppm）样品与Y1.5Gd1.5Al2Ga3O12:Ce样品相比，闪烁衰减时间更快，LY值相近。Y1.5Gd1.5Al2Ga3O12:Ce,Mo （600 ppm）的产光量为34,300光子/MeV，闪烁衰减时间为45.2 ns (55%) +153 ns(45%)，时间分辨率为313 ps。在RT下测量了辐射发光和余辉信号并进行了讨论。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.