- Address
- 305-0044 茨城県つくば市並木1-1 [アクセス]
研究内容
- Keywords
Single crystal growth; Optical materials; Radiation detection
出版物2004年以降のNIMS所属における研究成果や出版物を表示しています。
論文
- Dongsheng Yuan. Air-Stable Bulk Halide Single-Crystal Scintillator Cs3Cu2I5 by Melt Growth: Intrinsic and Tl Doped with High Light Yield. ACS Applied Materials & Interfaces. 12 [34] (2020) 38333-38340 10.1021/acsami.0c09047
- Dongsheng Yuan, Encarnación G. Víllora, Satoshi Tominaka, Kiyoshi Shimamura. Distinctive Ce3+ luminescence from single-crystalline and glassy Ce:LaB3O6. Journal of Materials Chemistry C. 10 [9] (2022) 3567-3575 10.1039/d1tc05775h
- Yu Song, Dongsheng Yuan, Xingye Lu, Zhijun Xu, Edith Bourret-Courchesne, Robert J. Birgeneau. Strain-Induced Spin-Nematic State and Nematic Susceptibility Arising from 2×2 Fe Clusters in KFe0.8Ag1.2Te2. Physical Review Letters. 123 [24] (2019) 247205 10.1103/physrevlett.123.247205
会議録
- YUAN Dongsheng, MORETTI Federico, PERRODIN Didier, BOURRET Edith. Role of AuBr3 Additive in Eu vs Ce Activated Bromide Single-crystal Scintillators. Bulletin of Japan Electronic Materials Society. (2021) 72-76
口頭発表
- YUAN, Dongsheng. Air-stable metal-halide single crystal scintillator Cs3Cu2I5: Intrinsic and with TI doping. 44th International Conference and Expo on Advanced Ceramics and Composites (ICACC 2020). 2020
- YUAN Dongsheng, VILLORA Garcia, SHIMAMURA Kiyoshi. Study on Micro- and Submicro-defects in CeF3 Single Crystals. The 8th Asian Conference on Crystal Growth and Crystal Technology/https://cgct-8.com/. 2021
- YUAN Dongsheng, VILLORA Garcia, SHIMAMURA Kiyoshi. Comparison between single-crystalline and glassy Ce:LaB3O6. 14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14). 2021
その他の文献
- YUAN, Dongsheng, VILLORA, Garcia, SHIMAMURA, Kiyoshi. Study on Voids in CeF3 Single Crystals. 日本電子材料技術協会会報. 52 (2021) 59-63
所属学会
日本結晶成長学会, 応用物理学会, American Ceramic Society
電子・光機能材料研究センター
Oxide and halide single-crystals for radiation detection
Single-crystal growth, Crystal defects engineering, Scintillators, Radiation detection
概要
Inorganic single-crystal radiation detectors are widely employed in the fields of homeland security, industrial nondestructive inspection, nuclear medicine imaging, and high-energy physics. Even though depending on the specific application the required properties vary, there is a general market demand for scintillators that are chemically stable, cost-effective, and efficient.
Two distinct application-oriented topics are mainly focused: (1) thermal neutron scintillators for handheld detectors (stable oxides instead of the currently used highly hygroscopic halides) and (2) new X/γ-rays scintillators (good air-stability, high light yield, excellent non-proportionality).
新規性・独創性
• Development of non-hygroscopic thermal neutron scintillator Ce:Li6Y(BO3)3 (LYBO): (1) greatly reduced scattering centers for the first time, (2) high light yield over 4000 ph/n, (3) inch-size bulk crystal growth.
• Finding of a new chemically-stable and bright halide scintillator Cs3Cu2I5 (CCI) that can be grown into large-size single crystals via the melt method.
内容
• The previously disregarded Ce: LYBO due to extremely low light yield has been developed using the strategies of proper Ce3+-doping and drastic reduction of scattering centers, with the light yield being comparable to the reference Li-glass (GS20).
• Large-size crystal growth of the new iodide scintillator CCI is achieved by the melt method that is practicable in mass production. Tl:CCI exhibits a high light yield, good energy resolution, and excellent non-proportionally (less than 3%) while being chemically-stable compared with the commercial halide scintillators such as NaI and SrI2.
まとめ
• High light yield of Ce:LYBO makes this family practically promising for handheld neutron detection. The successful strategies will be extrapolated to other low melting-point oxide scintillators.
• The stable and bright scintillator CCI has gained great attention worldwide. After doping, the optimized Tl:CCI has been found even brighter that the commercial Eu:SrI2.
