Research on the co-doping effects of 4-6 group cations on scintillation properties in various Ce doped single crystal scintillators and their performance improvement mechanism
Project/Area Number |
19K12626
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 80040:Quantum beam science-related
|
Research Institution | Tohoku University |
Principal Investigator |
KIM Kyoung Jin 東北大学, 金属材料研究所, 学術研究員 (10521768)
|
Co-Investigator(Kenkyū-buntansha) |
鎌田 圭 東北大学, 未来科学技術共同研究センター, 准教授 (60639649)
|
Project Period (FY) |
2019-04-01 – 2022-03-31
|
Project Status |
Completed (Fiscal Year 2021)
|
Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | 結晶成長 / Scintillator / Ce添加 / 共添加 / シンチレータ / GAGG / LYSO / LuAG / LaBr3 / Scintillators / Single crystal growth / Co-doping / Mechanism |
Outline of Research at the Start |
核医学、資源探査、素粒子物理、セキュリティ、物流計測など広汎な応用範囲を持つ放射線検出器は、一般にシンチレータと、蛍光を検出する受光素子から構成されており、最終製品の性能を決定する主要な部位となっている。本研究では、主な検討対象としてCe:LYSO、Ce:GAGG、Ce:LuAG、Ce:LaBr3といった、バンド構造や各種欠陥の形成要因が異なるシンチレータに対し、4~6族陽イオンを共添加することで、各シンチレータに対する特性改善メカニズムを解明し、普遍的な理論として確立するとともに、最適な共添加元素・添加量の検討を行いシンチレータ特性の最大化も狙う。
|
Outline of Final Research Achievements |
The effect of group 4-6 ions, such as Mo and W, co-doping on the scintillation properties of various scintillator crystals grown by the micro-pulling down (μ-PD) method was investigated for the first time. The optimal co-doping ion concentrations for the best scintillation properties were found. Crystals with optimized compositions were grown also as 1-inch boules by the Czochralski (CZ) technique. Chemical composition, optical properties, luminescence characteristics, and scintillation characteristics for the grown crystals were investigated. Such data gave the information for the fine composition and growth parameters adjustment. Additionally, the luminescence mechanism of the grown crystals was investigated and discussed together with Professor Nikl, an international collaborator. The deep understanding of such a mechanism enabled further improvement of the scintillation properties of co-doped crystals.
|
Academic Significance and Societal Importance of the Research Achievements |
・GAGGシンチレータに対する4~6族陽イオン共添加によるシンチレータ特性の変化とその発光メカニズムの解明に向けた基盤となる研究成果となり、シンチレータの発光現象に対する共添加元素の効果を明らかにすることができた。現在も世界規模で競争が繰り広げられている、新規高性能シンチレータ開発や既存シンチレータの性能改善につながる指針となる成果である。 ・ 発光メカニズムの解明は、世界的なシンチレータ研究の進展にも貢献し、学術上の意義は大きい。さらに、従来提唱されてきた特性改善メカニズム理論を覆す、新たな発光特性改善メカニズムを提唱できれば、学術的独自性と創造性が多大である。
|
Report
(4 results)
Research Products
(41 results)
-
-
-
-
-
[Journal Article] Development of the Multi-Cubic gamma-ray spectrometer and its performance under intense Cs-137 and Co-60 radiation fields2021
Author(s)
Masaaki Kaburagi, Kenji Shimazoe, Masahiro Kato, Tadahiro Kurosawa, Kei Kamada, Kyoung Jin Kim, Masao Yoshino, Yasuhiro Shoji, Akira Yoshikawa, Hiroyuki Takahashi
-
Journal Title
Nuclear Inst. and Methods in Physics Research, A
Volume: 1010
Pages: 165544-165544
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
[Journal Article] Luminescence and scintillation properties of Gd3Sc2(Al3-xGax)O-12:Ce (x=1, 2, 3) garnet crystals2021
Author(s)
Warut Chewpraditkul, Nakarin Pattanaboonmee, Weerapong Chewpraditkul, Ongsa Sakthong, Kyoung Jin Kim, Masao Yoshino, Takahito Horiai, Shunsuke Kurosawa, Akira Yoshikawa, Kei Kamada, Winicjusz Drozdowski, Marcin E. Witkowski, Michal Makowski, Romana Kucerkova, Martin Nikl
-
Journal Title
Radiation Physics and Chemistry
Volume: 187
Pages: 109559-109559
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
[Journal Article] Growth and scintillation properties of Tl-doped CsI/KI/KCl ternary eutectics2021
Author(s)
Yui Takizawa, Kei Kamada, Naoko Kutsuzawa, Kyoung Jin Kim, Masao Yoshino, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Takashi Hanada, Kochurikhin Vladimir, Akira Yoshikawa
-
Journal Title
Journal of Crystal Growth
Volume: 573
Pages: 126287-126287
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
[Journal Article] Gamma-ray spectroscopy with a CeBr3 scintillator under intense γ-ray fields for nuclear decommissioning2021
Author(s)
Masaaki Kaburagi, Kenji Shimazoe, Masahiro Kato, Tadahiro Kurosawa, Kei Kamada, Kyoung Jin Kim, Masao Yoshino, Yasuhiro Shoji, Akira Yoshikawa, Hiroyuki Takahashi, Tatsuo Torii
-
Journal Title
Nuclear Inst. and Methods in Physics Research, A
Volume: 988
Pages: 164900-164903
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
[Journal Article] Growth and scintillation properties of directionally solidified Ce:Labr3/AEBr2 (AE = mG, Ca, Sr, Ba) eutectic system2020
Author(s)
Kyoung Jin Kim, Yuki Furuya, Kei Kamada, Rikito Murakami, Vladimir Kochurikhin, Masao Yoshino, Hiroyuki Chiba, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Satoshi Toyoda, Hiroki Sato, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
-
Journal Title
Crystals
Volume: 10
Issue: 7
Pages: 587-591
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
[Journal Article] Growth of Lu2O3 and HfO2 based high melting temperature single crystals by indirect heating method using arc plasma2020
Author(s)
Kyoung Jin Kim, Kei Kamada, Rikito Murakami, Takahito Horiai, Shiori Ishikawa, Vladimir Kochurikhin, Masao Yoshino, Akihiro Yamaji, Yasuhiro Shoji, Shunsuke Kurosawa, Satoshi Toyoda, Hiroki Sato, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
-
Journal Title
Crystals
Volume: 10
Issue: 7
Pages: 619-622
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
[Journal Article] A cubic CeBr3 gamma-ray spectrometer suitable for the decommissioning of the Fukushima Daiichi Nuclear Power Station2020
Author(s)
Masaaki Kaburagi, Kenji Shimazoe; Yutaka Otaka, Mizuki Uenomachi, Kei Kamada, Kyoung Jin Kim, Masao Yoshino, Yasuhiro Shoji, Akira Yoshikawa, Hiroyuki Takahashi, Tatsuo Torii
-
Journal Title
Nuclear Inst. and Methods in Physics Research, A
Volume: 971
Pages: 164118-164121
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
-
-
[Presentation] Growth and scintillation properties of directionally solidified eutectic scintillators2021
Author(s)
Kyoung Jin Kim, Kei Kamada, Rikito Murakami, Masao Yoshino, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Vladimir Kochurikhin, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Takashi Hanada, Yuui Yokota, Akira Yoshikawa
Organizer
22nd American Conference on Crystal Growth and Epitaxy (ACCGE-22)
Related Report
Int'l Joint Research
-
[Presentation] Growth and scintillation properties of Tb-doped BaCl2/NaCl/KCl ternary eutectics for radiation imaging applications2021
Author(s)
Yui Takizawa, Kei Kamada, Kyoung Jin Kim, Masao Yoshino, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Takashi Hanada, Vladimir. V. Kochurikhin, Akira Yoshikawa
Organizer
22nd American Conference on Crystal Growth and Epitaxy (ACCGE-22)
Related Report
Int'l Joint Research
-
-
-
-
-
[Presentation] Effects of 4-6 group ions co-doping on luminescence and scintillation properties in Ce:Lu3Al5O12 single crystal scintillators2021
Author(s)
Kyoung Jin Kim, Kei Kamada, Shiori Ishikawa, Vladimir V. Kochurikhin, Masao Yoshino, Yasuhiro Shoji, Akihiro Yamaji, Shunsuke Kurosawa, Satoshi Toyoda, Hiroki Sato, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
The 8th Asian Conference on Crystal Growth and Crystal Technology (CGCT-8)
Related Report
Int'l Joint Research
-
[Presentation] Development of large size crystal growth technology of oxide eutectic scintillator and a proto-type Talbot-Lau imaging system2020
Author(s)
Kei Kamada, Kyoung Jin Kim, Rikito Murakami, Vladimir V Kochurikhin, Masao Yoshino, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa
Organizer
2020 International Conference on Solid State Devices and Materials
Related Report
Int'l Joint Research
-
-
[Presentation] Study on a Multi-Photon Gamma-Ray Coincidence Imaging Method 2 (Development of Scintilaltors)2020
Author(s)
Kei Kamada, Kyoung Jin Kim, Masao Yoshino, Yasuhiro Shoji, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Kenji Shimazoe, Miwako Takahashi, Hiromitsu Haba, Toshimitsu Momose, Hiroyuki Takahashi, Akira Yoshikawa
Organizer
2020 第67回 応用物理学会 春季学術講演会
Related Report
-
[Presentation] The development and performance evaluation of 1 mm-pixelated CeBr3 scintillator arrays2019
Author(s)
Masao Yoshino, Kyoung Jin Kim, Kei Kamada, Yuui Yokota, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Yuji Ohashi, Hiroki Sato, Kazuya Fujieda, Ryo Tanaka, Jun Kataoka, And Akira Yoshikawa
Organizer
15th International conference on Scintillating Materials and their Applications (SCINT2019)
Related Report
Int'l Joint Research
-
[Presentation] Effects of 4-6 group ions co-doping on luminescence and scintillation properties in Ce doped Gd3(Ga,Al)5O12 single crystals2019
Author(s)
Mutsumi Ueno, Kyoung Jin Kim, Kei Kamada, Takahiro Nihei, Masao Yoshino, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
15th International conference on Scintillating Materials and their Applications (SCINT2019)
Related Report
Int'l Joint Research
-
-
[Presentation] Effect of Mo co-doping on scintillation properties of Ce:Gd3(Ga, Al)5O12 single crystal scintillators with various Al-to-Ga ratios2019
Author(s)
Kyoung Jin Kim, Kei Kamada, Masao Yoshino, Yasuhiro Shoji, Vladimir V. Kochurikhin, Akihiro Yamaji, Satoshi Toyoda, Hiroki Sato, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
2019 第80回 応用物理学会 秋季学術講演会
Related Report
-
[Presentation] Effect of Mo co-doping to Yttrium-aluminum oxcide scintillators2019
Author(s)
Mutsumi Ueno, Kyoung Jin Kim, Kei Kamada, Takayuki Nihei, Masao Yoshino, Akihiro Yamaji, Satoshi Toyoda, Hiroki Sato, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
2019 第80回 応用物理学会 秋季学術講演会
Related Report
-
[Presentation] Growth and characterization of Ce:LaBr3 based eutectic systems2019
Author(s)
Kei Kamada, Hiroyuki Chiba, Yuki Furuya, Kyoung Jin Kim,Masao Yoshino, Rikito Murakami, Yasuhiro Shoji, Vladimir V. Kochurikhin, Akihiro Yamaji, Shunsuke Kurosawa, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa
Organizer
The Sixth Directionally Solidified Eutectics Conference (DSEC VI)
Related Report
Int'l Joint Research
-
[Presentation] Development of X-ray Talbot-Lau imaging system using large area Tb doped GAP/α-Al2O3 eutectic scintillator plates2019
Author(s)
Kei Kamada, Akihiro Yamaji, Nobuhiro Yasui, Ryota Ohashi, Toru Den, Kyoung Jin Kim, Shunsuke Kurosawa, Yasuhiro Shoji, Yuui Yokota,Yuji Ohashi, Akira Yoshikawa
Organizer
The Sixth Directionally Solidified Eutectics Conference (DSEC VI)
Related Report
Int'l Joint Research
-
[Presentation] Difference of Mg2+ and Mo6+ co-doping effects on luminescence and scintillation properties of Ce:LuAG single crystal scintillators2019
Author(s)
Kyoung Jin KIM, Kei KAMADA, Masao YOSHINO, Yasuhiro SHOJI, Vladimir KOCHURIKHIN, Akihiro YAMAJI, Satoshi TOYODA, Shunsuke KUROSAWA, Yuui YOKOTA, Yuji OHASHI, Akira YOSHIKAWA
Organizer
8th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices (PRE'19)
Related Report
Int'l Joint Research
-
[Presentation] Comparison of Mo ion co-doping effects in Ce:Y3Al5O12 and Ce:YAlO3 single crystal scintillators2019
Author(s)
Mutsumi UENO, Kyoung Jin KIM, Kei KAMADA, Takayuki NIHEI, Masao YOSHINO, Akira YAMAJI, Hiroki SATO, Shunsuke Kurosawa, Yuui YOKOTA, Yuji OHASHI, Akira YOSHIKAWA
Organizer
8th International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices (PRE'19)
Related Report
Int'l Joint Research
-
-
[Presentation] Development of mass production technology of Ce:Gd3(Ga,Al)5O12 scintillator for radiation imaging applications2019
Author(s)
Kei Kamada, Yasuhiro Shoji, Vladimir Kochurikhin, Gushchina Liudmila, Masao Yoshino, Kyoung Jin Kim, Akira Yamaji, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
19th International Conference on Crystal Growth and Epitaxy (ICCGE-29)
Related Report
Int'l Joint Research / Invited
-
[Presentation] Multiple shaped crystal growth of oxide scintillators using Mo crucible and dies by the edge defined film fed growth method2019
Author(s)
Kei Kamada, T. Kotaki, H.Saito, F. Horikoshi, M. Miyazaki, Masao Yoshino, Akihiro Yamaji, Kyoung Jin Kim, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
19th International Conference on Crystal Growth and Epitaxy (ICCGE-29)
Related Report
Int'l Joint Research
-
[Presentation] Comparison co-doping effects between Mg and W on Ce:Gd3Ga3Al2O12 scintillator grown by micro pulling down method2019
Author(s)
Mutsumi Ueno, Kyoung Jin Kim, Kei Kamada, Takayuki Nihei, Masao Yoshino, Akira Yamaji, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Hiroki Sato, Akira Yoshikawa
Organizer
19th International Conference on Crystal Growth and Epitaxy (ICCGE-29)
Related Report
Int'l Joint Research
-
[Presentation] Bulk single crystal growth of W, Ce:Gd3Ga3Al2O12 by Czochralski method and their uniformity of scintillation properties2019
Author(s)
Mutsumi Ueno, Kyoung Jin Kim, Kei Kamada, Takayuki Nihei, Masao Yoshino, Akira Yamaji, Hiroki Sato, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
Organizer
19th International Conference on Crystal Growth and Epitaxy (ICCGE-29)
Related Report
Int'l Joint Research
-
[Presentation] Single crystal growth of undoped and Tb doped Lu2O3 and HfO2 by indirect heating growth method using arc plasma2019
Author(s)
Rikito Murakami, Kei Kamada, Vladimir Kochurikhin, Kyoung Jin Kim, Yasuhiro Shoji, Masao Yoshino, Akihiro Yamaji, Shunsuke Kurosawa, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa
Organizer
19th International Conference on Crystal Growth and Epitaxy (ICCGE-29)
Related Report
Int'l Joint Research