Research on Efficient Fast Scintillators: Evidence and X-Ray Absorption Near Edge Spectroscopy Characterization of Ce4+ in Ce3+, Mg2+-Co-Doped Gd3Al2Ga3O12 Garnet Crystal

被引：45

作者：

Dantelle, Geraldine ^{[1
]}

Boulon, Georges ^{[2
]}

Guyot, Yannick ^{[2
]}

Testemale, Denis ^{[1
]}

Guzik, Malgorzata ^{[3
]}

Kurosawa, Shunsuke ^{[4
]}

Kamada, Kei ^{[4
]}

Yoshikawa, Akira ^{[4
]}

机构：

[1] European Synchrotron Radiat Facil, Inst NEEL, CNRS UGA UPR2940, 25 Rue Martyrs, F-38042 Grenoble, France

[2] Univ Lyon, ILM, UMR5306 CNRS UCB Lyon1, F-69622 Villeurbanne, France

[3] Univ Wroclaw, Fac Chem, Ul Joliot Curie 14, PL-50383 Wroclaw, Poland

[4] Tohoku Univ, IMR, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2020年 / 257卷 / 08期

基金：

日本学术振兴会;

关键词：

Ce3+ and Ce4+ dopants; fast scintillator; garnet crystals; optical spectroscopy; X-ray absorption near edge spectroscopy; SINGLE-CRYSTAL; LUAG; GROWTH;

D O I：

10.1002/pssb.201900510

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Herein, the most advanced oxide scintillator Ce3+, Mg2+-co-doped Gd3Al2Ga3O12 (GAGG) garnet host, grown using the Czochralski method is reported. The charge transfer absorption band in UV, such as in other Ce3+, Mg2+-co-doped oxides, reveals the creation of stable Ce4+ oxidation state, in addition to the usual Ce3+ one, admitted as responsible of the scintillation mechanism improvement displayed by this garnet. Strangely, the confirmation of quantitative values of Ce4+ concentration has never been done, and the goal is mainly focused on the presence of Ce4+ and the evaluation of the Ce3+/Ce4+ ratio measured by X-ray absorption near edge spectroscopy (XANES) spectroscopy at the Ce L-III threshold of the European Synchrotron Radiation Facility (ESRF). This result is compared with those obtained for Ce3+, Mg2+-co-doped Lu3Al5O12 (LuAG) and, also, in garnets without any Mg2+ ions such as Ce3+-doped GAGG, Ce3+-doped LuAG, and Ce3+-doped YAG. The role of Li+ ion in place of Mg2+ one is also considered in Ce3+, Li+-co-doped LuAG single crystal.

引用

页数：7

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