プロジェクト

トップ
プロジェクト
次世代向けシンチレータ結晶の量産技術開発

Projects

プロジェクト

次世代向けシンチレータ結晶の量産技術開発

代表者氏名・所属部局(機関)名・職名

吉川　彰・金属材料研究所・教授

研究の概要

本プロジェクトでは、次世代の医療機器や環境測定に用いる新規シンチレータ結晶の材料探索・量産技術開発及びそのデバイス化に関する開発を行っています。我々が開発したマイクロ引き下げ法による高速材料探索技術とCz法による量産化技術を融合させることにより、新規高性能シンチレータの速やかな社会実装を目指します。

実績

【2019年度の実績】

【学会発表】

招待講演：総件数　　６　件

Yoshikawa, Y. Yokota, K. Kamada et al., “Development of bulk crystal growth technology for novel functional crystals and their social implementation”, 19^th International Conference on Crystal Growth and Epitaxy, Colorado, USA, 2019/07/28 – 08/02.
Yoshikawa, “Bulk crystal growth of Ce doped Gd₃(Ga, Al)₅O₁₂ single crystal from the melt without precious metal crucible and its scintillation properties”, 8^th International Symposium on Optical Materials, Wroclaw, Poland, 2019/06/09 – 06/14.
Y. Yokota, “Effects of chemical composition control for LiCaAlF₆ and LiSrAlF₆ neutron scintillator single crystals”, 8^th International Symposium on Optical Materials, Wroclaw, Poland, 2019/06/09 – 06/14.
K. Kamada, Y. Shoji, Y. Yokota, A. Yoshikawa et al., “Development of mass production technology of Ce:Gd₃(Ga, Al)₅O₁₂ scintillator for radiation imaging applications”, 19^th International Conference on Crystal Growth and Epitaxy, Colorado, USA, 2019/07/28 – 08/02

国際会議：総件数　 79 　件

Y. Shoji, K. Kamada, Y. Yokota, A. Yoshikawa et al., “Growth and quality improvement of Ce-doped (Gd, La)₂Si₂O₇ scintillator crystals”, 19^th International Conference on Crystal Growth and Epitaxy, Colorado, USA, 2019/07/28 – 08/02
K. Kamada, Y. Yokota, A. Yoshikawa et al., “Melt growth and luminescence properties Lu₂O₃ based high dense single crystals grown by indirect heating method using arc plasma”, 8^th International Workshop on Photoluminescence in Rare Earth: Photonic Materials and Devices, Nice, France, 2019/09/04 – 09/06
K. Kamada, Y. Shoji, Y. Yokota, A. Yoshikawa et al., “Growth and characterization of Ce:LaBr₃ based eutectic systems”, The Sixth Directionally Solidified Eutectics Conference, Fisciano, Italy, 2019/09/10 – 09/13.
Y. Yokota, K. Kamada, A. Yoshikawa et al., “Phase diagram of BaI₂-REI₃ (RE = Rare earth) and their composite scintillators”, 15^th International Conference on Scintillating Materials and their Applications, Sendai, Japan, 2019/09/30 – 10/04.

国内会議：総件数　 37 　件

横田有為、鎌田圭、吉川彰　他、“BaI₂/REI₃ (RE:Rare earth)共晶体シンチレータの作製”、第48回結晶成長国内会議、大阪、2019/10/30 – 11/01/
鎌田圭、庄子育宏、横田有為、吉川彰　他、“Submerged Core Hearting法を用いたLu₂O₃、HfO₂系結晶の作製とシンチレータ特性評価”、第80回応用物理学会秋季学術講演会、北海道、2019/09/18 – 09/21.

【論文】

総件数：　 31 　件

K. Kamada, T. Iida, Y. Furuya, K. J. Kim, M. Yoshino, R. Murakami, Y. Shoji, V. V. Kochurikhin, A. Yamaji, S. Kurosawa, Y. Ohashi, Y. Yokota, A. Yoshikawa, “Crystal growth and scintillation properties of Eu-doped Ca(Br_xI_1-x)₂ crystals”, Radiat. Meas., 127 (2019) 106139.
K. Kamada, M. Nikl, T. Kotaki, H. Saito, F. Horikoshi, M. Miyazaki, K. J. Kim, R. Murakami, M. Yoshino, A. Yamaji, Y. Shoji, S. Kurosawa, S. Toyoda, H. Sato, Y. Yokota, Y. Ohashi, V. Kochurikhin, A. Yoshikawa, “Multiple shaped-crystal growth of oxide scintillators using Mo crucible and die by the edge defined film fed growth method”, J. Cryst. Growth, 535 (2020) 125510.
S. Kodama, S. Kurosawa, M. Ohno, A. Yamaji, M. Yoshino, J. Pejchal, R. Kral, Y. Ohashi, K. Kamada, Y. Yokota, M. Nikl, A. Yoshikawa, “Development of a novel red-emitting cesium hafnium iodide scintillator”, Radiat. Meas., 124 (2019) 54 – 58.
S. Kurosawa, T. Shishido, T. Sugawara, K. Yubuta, T. Horiai, V. Jary, A. Yamaji, M. Yoshino, Y. Yokota, Y. Shoji, K. Kamada, A. Yoshikawa, J. Pejchal, M. Nikl, “Scintillation properties of Y-admixed Gd₂Si₂O₇ scintillator”, Radiat. Meas., 126 (2019) 106123.
T. Iida, K. Kamada, M. Yoshino, K. J. Kim, K. Ichimura, A.Yoshikawa, “High-light-yield calcium iodide (CaI₂) scintillator for astroparticle physics”, Nucl. Instrum. Methods Phys. Res. A, 958 (2019) 162629.
V. Kochurikhin, K. Kamada, K. J. Kim, M. Ivanov, L. Gushchina, Y. Shoji, M. Yoshino, A. Yoshikawa, “Czochralski growth of 4-inch diameter Ce:Gd₃Al₂Ga₃O₁₂ single crystals for scintillator applications”, J. Cryst. Growth, 531 (2019) 125384.
M. Yoshino, K. Bartosiewicz, T. Horiai, K. Kamada, A. Yamaji, Y. Shoji, Y. Yokota, S. Kurosawa, Y. Ohashi, H. Sato, S. Toyoda, R. Kucerkova, V. Jary, M. Nikl, A. Yoshikawa, “Relationship Between Li/Ce Concentration and the Luminescence Properties of Codoped Gd₃(Ga, Al)₅O₁₂:Ce”, Phys. Status Solidi B Basic Solid State Phys., (2019) 1900504.
K. Origuchi, Y. Yokota, R. Kral, M. Yoshino, A. Yamaji, S. Toyoda, H. Sato, Y. Ohashi, S. Kurosawa, K. Kamada, A. Yoshikawa, “Phase diagram of BaI₂-LuI₃ system and growth of BaI₂/LuI₃ eutectic scintillator”, J. Cryst. Growth, 536 (2020) 125573.
M. Ueno, K.J. Kim, K. Kamada, V. Babin, M. Nikl, T. Nihei, M. Yoshino, A. Yamaji, S. Toyoda, H. Sato, Y. Yokota, S. Kurosawa, Y. Ohashi, V.V. Kochurikhin, A. Yoshikawa, “Bulk single crystal growth of W co-doped Ce:Gd₃Ga₃Al₂O₁₂ by Czochralski method”, J. Cryst. Growth, 539 (2020) 125513.
S. Kodama, S. Kurosawa, M. Ohno, Y. Morishita, H. Usai, M. Hayashi, M. Sasano, T. Azuma, H. Tanaka, V. Kochurikhin, A. Yamaji, M. Yoshino, S. Toyoda, H. Sato, Y. OHASHI, K. Kamada, Y. Yokota, A. Yoshikawa, T. Torii, “Fiber-reading radiation monitoring system using an optical fiber and red-emitting scintillator for ultra-high dose condition”, Appl. Phys. Express, 13 (2020) 047002.