Development of fast-type GAGG scintillator for realizing higher performance PET system

• Project/Area Number: 16H05986
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Optical engineering, Photon science
• Research Institution: Tohoku University
• Principal Investigator: Kamada Kei 東北大学, 未来科学技術共同研究センター, 准教授 (60639649)
• Research Collaborator: USUKI Yoshiyuki
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥24,830,000 (Direct Cost: ¥19,100,000、Indirect Cost: ¥5,730,000); Fiscal Year 2018: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000); Fiscal Year 2017: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000); Fiscal Year 2016: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
• Keywords: シンチレータ / 放射線 / 結晶成長 / 核医学 / 放射線検出器 / 単結晶成長 / 医療画像装置 / 結晶工学 / 放射線検出

Outline of Final Research Achievements

In this research, we have optimized the crystal composition, surface treatment, and annealing condition for maximizing scintillator properties of fast-type GAGG single crystal with co-doping. As a result, we found a composition with a scintillation decay time of 36 ns and a timing resolution of 160 ps while keeping the light yield. Furthermore, we advanced development of large-scale crystal growth technology for fast-type GAGG. In addition to the adjustment of the temperature gradient by the examination of the heat insulating material arrangement condition, the coil position, the growth atmosphere, and the rotation speed were optimized, and the crystal of 3 inches in diameter x 150 mm in length was stably produced. With the cooperation of Furukawa Scintitech Co., Ltd., the fast-type GAGG was mounted on a PET device, and a resolution of 0.98 mm FWHM and a sensitivity of 1.31% were achieved.

Academic Significance and Societal Importance of the Research Achievements

癌細胞の検知やアルツハイマー病の部位の同定などにポジトロン断層法（positron emission tomography：PET）が用いられている。高性能なPET装置の開発には、高速かつ高効率で高感度、高いエネルギー分解能を有するシンチレータの研究開発が重要となる。本研究の成果である、高速型GAGGシンチレータを、PET装置に搭載することで、位置分解能、感度、S/N比の向上が可能であり、がん診断の高精度化に繋がる。また事故放射能の無いGAGGを用いることで、PETを革新する、コンプトンPETカメラなどの新規医療画像装置の開発が進む。新規学術分野の発展や、医療分野の社会的貢献につながる。

Research Products

• [Int'l Joint Research] Physics AS CR(チェコ)
• [Int'l Joint Research] ソウル大学(韓国)
• [Int'l Joint Research] Institute of Physics AS CR(チェコ)
• [Int'l Joint Research] General Physics Institute(ロシア連邦)
• [Int'l Joint Research] Korea University(韓国)
• [Int'l Joint Research] CERN(Switzerland)
• [Int'l Joint Research] Princeton University(米国)
• [Int'l Joint Research]
• [Journal Article] Development of a high resolution LaGPS imaging detector with pulse shape discrimination capability of different types of radiations (2019)
  • Author(s): Yamamoto Seiichi、Kamada Kei、Kurosawa Shunsuke、Yoshikawa Akira
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 922 Pages: 8-18
  • DOI: 10.1016/j.nima.2018.11.056
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• [Journal Article] Thermoelectric properties of Nb-doped SrTiO?/TiO? eutectic solids fabricated by unidirectional solidification (2019)
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• [Journal Article] Comprehensive study on Ce-doped (Gd, La)2Si2O7 scintillator (2018)
  • Author(s): Shunsuke Kurosawa, Takahiko Horiai, Rikito Murakami, Yasuhiro Shoji, Pejchal Jan, Akihiro Yamaji, Shohei Kodama, Yuji Ohashi, Yuui Yokota, Kei Kamada, Akira Yoshikawa, Akimasa Ohnishi, Mamoru Kitaura
  • Journal Title: IEEE Transactions on Nuclear Science Volume: 65 Issue: 8 Pages: 2136-2139
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• [Journal Article] Crystal structure of Ce-doped (La,Gd) 2 Si 2 O 7 grown by the Czochralski process (2018)
  • Author(s): Murakami Rikito、Kurosawa Shunsuke、Yamane Hisanori、Horiai Takahiko、Shoji Yasuhiro、Yokota Yuui、Yamaji Akihiro、Ohashi Yuji、Kamada Kei、Yoshikawa Akira
  • Journal Title: J. Alloys Compd. Volume: 748 Pages: 404-404
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• [Journal Article] Growth and luminescent properties of Ce and Eu doped Cesium Hafnium Iodide single crystalline scintillators (2018)
  • Author(s): Shohei Kodama, Shunsuke Kurosawa, Akihiro Yamaji, Jan Pejcahl, Robert Kral, Yuji Ohashi, Kei Kamada, Yuui Yokota, Martin Nikl, Akira Yoshikawa
  • Journal Title: Journal of Crystal Growth Volume: 492 Pages: 1-5
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• [Journal Article] Crystal Growth and Optical Properties of Organic Crystals for Neutron Scintillators (2018)
  • Author(s): Akihiro YAMAJI, Shunsuke KUROSAWA, Yuji OHASHI, Yuui YOKOTA, Kei KAMADA and Akira YOSHIKAWA
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  • DOI: 10.1585/pfr.13.2405011
  • NAID: 130006639026
  • ISSN: 1880-6821
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• [Journal Article] Growth and Scintillation Properties of Two-Inch-Diameter SrI2(Eu) Single Crystals (2018)
  • Author(s): Shoji Yasuhiro、Kurosawa Shunsuke、Yokota Yuui、Hayasaka Shoki、Kamada Kei、Yoshino Masao、Yamaji Akihiro、Chani Valery、Ohashi Yuji、Sakuragi Shiro、Yoshikawa Akira
  • Journal Title: Crystal Growth & Design Volume: 18 Issue: 7 Pages: 3747-3752
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• [Journal Article] Crystal growth, optical properties, and scintillation responses of Pr-doped CeBr3 single crystals (2018)
  • Author(s): Yokota Yuui、Ito Tomoki、Yoshino Masao、Yamaji Akihiro、Ohashi Yuji、Kurosawa Shunsuke、Kamada Kei、Yoshikawa Akira
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  • DOI: 10.7567/jjap.57.070312
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• [Journal Article] Growth and characterization of directionally solidified eutectic systems for scintillator applications (2018)
  • Author(s): Yoshikawa Akira、Kamada Kei、Kurosawa Shunsuke、Yokota Yuui、Yamaji Akihiro、Chani Valery I.、Ohashi Yuji、Yoshino Masao
  • Journal Title: Journal of Crystal Growth Volume: 498 Pages: 170-178
  • DOI: 10.1016/j.jcrysgro.2018.02.032
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• [Journal Article] Optimization of Dopants and Scintillation Fibers’ Diameter of GdAlO3/<inline-formula> <tex-math notation="LaTeX">$\alpha$ </tex-math> </inline-formula>-Al2O3 Eutectic for High-Resolution X-Ray Imaging (2018)
  • Author(s): Kamada Kei、Yasui Nobuhiro、Ohashi Yoshihiro、Den Toru、Yamaguchi Hiroaki、Yamaji Akihiro、Shoji Yasuhiro、Yoshisno Masao、JinKim Kyoung、Kurosawa Shunsuke、Ohashi Yuji、Yokota Yuui、Yoshikawa Akira
  • Journal Title: IEEE Transactions on Nuclear Science Volume: 65 Issue: 8 Pages: 2036-2040
  • DOI: 10.1109/tns.2018.2841026
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Single crystal growth of submillimeter diameter sapphire tube by the micro-pulling down method (2018)
  • Author(s): Kamada Kei、Murakami Rikito、Kochurikhin Vladimir V.、Luidmila Gushchina、Jin Kim Kyoung、Shoji Yasuhiro、Yamaji Akihiro、Kurosawa Shunsuke、Ohashi Yuji、Yokota Yuui、Yoshikawa Akira
  • Journal Title: Journal of Crystal Growth Volume: 492 Pages: 45-49
  • DOI: 10.1016/j.jcrysgro.2018.03.023
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Phase formation and crystal growth of Ca3TaAl3Si2O14 piezoelectric single crystal (2018)
  • Author(s): Yokota Yuui、Ohashi Yuji、Yoshino Masao、Yamaji Akihiro、Kurosawa Shunsuke、Kamada Kei、Yoshikawa Akira
  • Journal Title: Japanese Journal of Applied Physics Volume: 57 Issue: 11S Pages: 11UD11-11UD11
  • DOI: 10.7567/jjap.57.11ud11
  • NAID: 210000149805
  • Peer Reviewed
• [Journal Article] Fabrication of flexible Ir and Ir-Rh wires and application for thermocouple (2018)
  • Author(s): Murakami Rikito、Kamada Kei、Shoji Yasuhiro、Yokota Yuui、Yoshino Masao、Kurosawa Shunsuke、Ohashi Yuji、Yamaji Akihiro、Yoshikawa Akira
  • Journal Title: Journal of Crystal Growth Volume: 487 Pages: 72-77
  • DOI: 10.1016/j.jcrysgro.2018.01.018
  • Peer Reviewed
• [Journal Article] Li + , Na + and K + co-doping effects on scintillation properties of Ce:Gd 3 Ga 3 Al 2 O 12 single crystals (2018)
  • Author(s): Yoshino Masao、Kamada Kei、Kochurikhin Vladimir V.、Ivanov Mikhail、Nikl Martin、Okumura Satoshi、Yamamoto Seiichi、Yeom Jung Yeol、Shoji Yasuhiro、Kurosawa Shunsuke、Yokota Yuui、Ohashi Yuji、Yoshikawa Akira
  • Journal Title: Journal of Crystal Growth Volume: 491 Pages: 1-5
  • DOI: 10.1016/j.jcrysgro.2018.03.004
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Visualizing hidden electron trap levels in Gd3Al2Ga3O12:Ce crystals using a mid-infrared free-electron laser (2018)
  • Author(s): Kitaura Mamoru、Zen Heishun、Kamada Kei、Kurosawa Shunsuke、Watanabe Shinta、Ohnishi Akimasa、Hara Kazuhiko
  • Journal Title: Applied Physics Letters Volume: 112 Issue: 3 Pages: 031112-031112
  • DOI: 10.1063/1.5008632
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Shallow electron traps formed by Gd2+ ions adjacent to oxygen vacancies in cerium-doped Gd3Al2Ga3O12 crystals (2018)
  • Author(s): Kitaura Mamoru、Watanabe Shinta、Kamada Kei、Jin Kim Kyoung、Yoshino Masao、Kurosawa Shunsuke、Yagihashi Toru、Ohnishi Akimasa、Hara Kazuhiko
  • Journal Title: Applied Physics Letters Volume: 113 Issue: 4 Pages: 041906-041906
  • DOI: 10.1063/1.5043218
  • Peer Reviewed
• [Journal Article] Effects of Ca/Sr ratio control on optical and scintillation properties of Eu-doped Li(Ca,Sr)AlF 6 single crystals (2018)
  • Author(s): Yokota Yuui、Tanaka Chieko、Kurosawa Shunsuke、Yamaji Akihiro、Ohashi Yuji、Kamada Kei、Nikl Martin、Yoshikawa Akira
  • Journal Title: Journal of Crystal Growth Volume: 490 Pages: 71-76
  • DOI: 10.1016/j.jcrysgro.2018.03.022
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Use of YAP(Ce) in the development of high spatial resolution radiation imaging detectors (2018)
  • Author(s): Yamamoto Seiichi、Kamada Kei、Yoshikawa Akira
  • Journal Title: Radiation Measurements Volume: 119 Pages: 184-191
  • DOI: 10.1016/j.radmeas.2018.11.001
  • Peer Reviewed
• [Journal Article] Development of ultrahigh resolution radiation imaging detector using 1 mm channel size Si-PM array combined with 0.2 mm × 0.2 mm pixelated GAGG plate (2018)
  • Author(s): Yamamoto,S.; Kataoka,J.; Fukuchi,T.; Kamada,K.; Yoshikawa,A
  • Journal Title: Journal of Instrumentation Volume: 13 Issue: 05 Pages: P05028-P05028
  • DOI: 10.1088/1748-0221/13/05/p05028
  • Peer Reviewed / Open Access
• [Journal Article] Ultrahigh resolution radiation imaging system using an optical fiber structure scintillator plate (2018)
  • Author(s): Yamamoto Seiichi、Kamada Kei、Yoshikawa Akira
  • Journal Title: Scientific Reports Volume: 8 Issue: 1 Pages: 1-10
  • DOI: 10.1038/s41598-018-21500-z
  • Peer Reviewed / Open Access
• [Journal Article] Studies on sub-millimeter LYSO:Ce, Ce:GAGG, and a new Ce:GFAG block detector for PET using digital silicon photomultiplier (2018)
  • Author(s): Ullah Muhammad Nasir、Pratiwi Eva、Park Jin Ho、Yamamoto Seiichi、Kamada Kei、Yoshikawa Akira、Yeom Jung-Yeol
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 911 Pages: 115-122
  • DOI: 10.1016/j.nima.2018.09.029
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Shape-controlled crystal growth of Fe-Ga alloys to apply a magnetostrictive vibration energy harvester (2018)
  • Author(s): Ito Masahiko、Kamada Kei、Yoshikawa Akira、Kawamata Toru、Fujieda Shun、Suzuki Shigeru、Minamitani Tamotsu、Ueno Toshiyuki
  • Journal Title: Journal of Alloys and Compounds Volume: 731 Pages: 898-902
  • DOI: 10.1016/j.jallcom.2017.10.109
  • Peer Reviewed
• [Journal Article] Crystal growth and temperature dependence of light output of Ce-doped (Gd, La, Y) 2 Si 2 O 7 single crystals (2018)
  • Author(s): Horiai Takahiko、Kurosawa Shunsuke、Murakami Rikito、Shoji Yasuhiro、Pejchal Jan、Yamaji Akihiro、Ohashi Yuji、Kamada Kei、Yokota Yuui、Ishizu Tomohiro、Ohishi Yasuo、Nakaya Taisuke、Yoshikawa Akira
  • Journal Title: Journal of Crystal Growth Volume: 486 Pages: 173-177
  • DOI: 10.1016/j.jcrysgro.2018.01.016
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of Ga content on luminescence and defects formation processes in Gd 3 (Ga,Al) 5 O 12 :Ce single crystals (2018)
  • Author(s): Grigorjeva L.、Kamada K.、Nikl M.、Yoshikawa A.、Zazubovich S.、Zolotarjovs A.
  • Journal Title: Opt. Mat. Volume: 75 Pages: 331-336
  • DOI: 10.1016/j.optmat.2017.10.054
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• [Journal Article] Measurement of non-equilibrium carriers dynamics in Ce-doped YAG, LuAG and GAGG crystals with and without Mg-codoping (2018)
  • Author(s): Lucchini M.T.、Buganov O.、Auffray E.、Bohacek P.、Korjik M.、Kozlov D.、Nargelas S.、Nikl M.、Tikhomirov S.、Tamulaitis G.、Vaitkevicius A.、Kamada K.、Yoshikawa A.
  • Journal Title: J. Lumin. Volume: 194 Pages: 1-7
  • DOI: 10.1016/j.jlumin.2017.10.005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Luminescence and scintillation characteristics of (Gd x Y 3-x )Al 2 Ga 3 O 12 :Ce (x?=?1,2,3) single crystals (2018)
  • Author(s): Chewpraditkul Warut、Pattanaboonmee Nakarin、Sakthong Ongsa、Chewpraditkul Weerapong、Szczesniak Tomasz、Moszynski Marek、Kamada Kei、Yoshikawa Akira、Nikl Martin
  • Journal Title: Opt. Mat. Volume: 76 Pages: 162-168
  • DOI: 10.1016/j.optmat.2017.12.025
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Crystal growth and scintillation properties of Pr-doped SrI 2 single crystals (2018)
  • Author(s): Yokota Yuui、Ito Tomoki、Yoshino Masao、Yamaji Akihiro、Ohashi Yuji、Kurosawa Shunsuke、Kamada Kei、Yoshikawa Akira
  • Journal Title: Journal of Crystal Growth Volume: 487 Pages: 126-130
  • DOI: 10.1016/j.jcrysgro.2018.02.025
  • Peer Reviewed
• [Journal Article] Mg,Ce co-doped Lu2Gd1(Ga,Al)5O12 by micro-pulling down method and their luminescence properties (2018)
  • Author(s): Kei Kamada1,2, Hiroaki Yamaguchi3, Masao Yoshino3, Shunsuke Kurosawa1, Yasuhiro Shoji2,3, Yuui Yokota1, Yuji Ohashi1, Jan Pejchal4, Martin Nikl4 and Akira Yoshikawa1,2,3
  • Journal Title: Japanese journal of applied physics Volume: 57 Issue: 4S Pages: 04FJ06-04FJ06
  • DOI: 10.7567/jjap.57.04fj06
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Growth and scintillation properties of Eu and Ce doped LiSrI3 single crystals (2017)
  • Author(s): Kamada Kei、Yoshino Masao、Murakami Rikito、Chiba Hiroyuki、Yamaji Akihiro、Shoji Yasuhiro、Kurosawa Shunsuke、Yokota Yuui、Ohashi Yuji、Kochurikhin Vladimir V.、Yoshikawa Akira
  • Journal Title: Journal of Materials Science: Materials in Electronics Volume: 28 Issue: 17 Pages: 13157-13160
  • DOI: 10.1007/s10854-017-7150-9
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Growth and scintillation properties of Eu doped LiSrI 3 /LiI eutectics (2017)
  • Author(s): Kamada Kei、Chiba Hiroyuki、Yoshino Masao、Yamaji Akihiro、Shoji Yasuhiro、Kurosawa Shunsuke、Yokota Yuui、Ohashi Yuji、Yoshikawa Akira
  • Journal Title: Optical Materials Volume: 68 Pages: 70-74
  • DOI: 10.1016/j.optmat.2017.05.010
  • Peer Reviewed
• [Journal Article] Energy location of Ce3+ 4f level and majority carrier type in Gd3Al2Ga3O12:Ce crystals studied by surface photovoltage spectroscopy (2017)
  • Author(s): Kitaura Mamoru、Azuma Junpei、Ishizaki Manabu、Kamada Kei、Kurosawa Shunsuke、Watanabe Shinta、Ohnishi Akimasa、Hara Kazuhiko
  • Journal Title: Applyied Phisics letter Volume: 110 Issue: 25 Pages: 251101-251101
  • DOI: 10.1063/1.4987141
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of the growth technique on cerium bromide single crystal by Halide-micro-pulling-down method (2017)
  • Author(s): Ito Tomoki、Yokota Yuui、Kurosawa Shunsuke、Kamada Kei、Ohashi Yuji、Yoshikawa Akira
  • Journal Title: Cryst. Res. Tech. Volume: 52 Issue: 6 Pages: 1600401-1600401
  • DOI: 10.1002/crat.201600401
  • Peer Reviewed
• [Journal Article] Development of high resolution phoswich depth-of-interaction block detectors utilizing Mg co-doped new scintillators (2017)
  • Author(s): Kobayashi Takahiro、Yamamoto Seiichi、Yeom Jung-Yeol、Kamada Kei、Yoshikawa Akira
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 875 Pages: 111-118
  • DOI: 10.1016/j.nima.2017.08.030
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Engineering of Eu dopant segregation in colquiriite-type fluoride single crystal scintillators (2017)
  • Author(s): Yokota Yuui、Yamaji Akihiro、Kurosawa Shunsuke、Ohashi Yuji、Kamada Kei、Yoshikawa Akira
  • Journal Title: AIP Adv. Volume: 7 Issue: 12 Pages: 125312-125312
  • DOI: 10.1063/1.5006996
  • Peer Reviewed
• [Journal Article] The current mode Time-over-Threshold ASIC for a MPPC module in a TOF-PET system (2017)
  • Author(s): T. Orita, A. Koyama, M. Yoshino, K. Kamada, A. Yoshikawa, K. Shimazoe, H. Sugawara
  • Journal Title: Nuclear Instruments and Methods in Physics A Volume: 印刷中 Pages: 303-308
  • DOI: 10.1016/j.nima.2017.11.097
  • Peer Reviewed
• [Journal Article] Effects of Mg-codoping on luminescence and scintillation properties of Ce doped Lu3(Ga,Al)5O12 single crystals (2017)
  • Author(s): Hiroaki Yamaguchi, Kei Kamada, Jan Pejchal, Shunsuke Kurosawa, Yasuhiro Shoji, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
  • Journal Title: Optical Materials Volume: 65 Pages: 60-65
  • DOI: 10.1016/j.optmat.2016.08.030
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 2 inch size Czochralski growth and scintillation properties of Li+ co-doped Ce:Gd3Ga3Al2O12 (2017)
  • Author(s): Kei Kamada, Yasuhiro Shoji, Vladimir V. Kochurikhin, Masao Yoshino, Satoshi Okumura, Seiichi Yamamoto, Jung Yeol Yeom, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Martin Nikl, Masao Yoshino, Akira Yoshikawa
  • Journal Title: Optical Materials Volume: 65 Pages: 52-55
  • DOI: 10.1016/j.optmat.2016.09.005
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Basic performance of Mg co-doped new scintillator used for TOF-DOI-PET systems (2017)
  • Author(s): Takahiro Kobayashi, Seiichi Yamamoto, Satoshi Okumura, Jung Yeol Yeom, Kei Kamada, Akira Yoshikawa
  • Journal Title: Nuclear Instruments and Methods in Physics A Volume: 842 Pages: 14-19
  • DOI: 10.1016/j.nima.2016.10.032
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Effects of dopant distribution improvement on optical and scintillation properties for Ce-doped garnet-type single crystals (2017)
  • Author(s): Yuui Yokota, Tetsuo Kudo, Yuji Ohashi, Shunsuke Kurosawa; Kei Kamada; Zhong Zeng; Yoshiyuki Kawazoe; Akira Yoshikawa
  • Journal Title: Journal of Materials Science: Materials in Electronics Volume: - Issue: 10 Pages: 1-6
  • DOI: 10.1007/s10854-017-6696-x
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mg co-doping effects on Ce doped Y3(Ga,Al)5O12scintillator (2017)
  • Author(s): Kei Kamada, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota1, Yuji Ohashi and Akira Yoshikawa
  • Journal Title: IOP Conf. Ser.: Mater. Sci. Eng Volume: 169 Pages: 12013-12013
  • DOI: 10.1088/1757-899x/169/1/012013
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Timing capabilities of garnet crystals for detection of high energy charged particles (2017)
  • Author(s): M.T. Lucchini, S. Gundacker, P. Lecoq, A. Benaglia, M. Nikl, K. Kamada, A. Yoshikawa, E. Auffray
  • Journal Title: Nuclear Instruments and Methods in Physics A Volume: - Pages: 1-9
  • DOI: 10.1016/j.nima.2017.02.008
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Growth and scintillation properties of 3 inch diameter Ce doped Gd3Ga3Al2O12 scintillation single crystal (2016)
  • Author(s): Kei Kamada, Yasuhiro Shoji, Vladimir V. Kochurikhin, Satoshi Okumura, Seiichi. Yamamoto, Aya Nagura, Jung Yeol Yeom, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Martin Nikl, Akira Yoshikawa
  • Journal Title: Journal of crystal growth Volume: 452 Pages: 162-165
  • DOI: 10.1016/j.jcrysgro.2016.04.037
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Growth and Scintillation Properties of Li and Ce co-doped Lu3Al5O12 scintillator (2016)
  • Author(s): Kei Kamada, Martin Nikl, Shunsuke Kurosawa, Alena Beitlerova, Aya Nagura, Yasuhiro Shoji, Jan Pejchal, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa
  • Journal Title: Journal of crystal growth Volume: 452 Pages: 85-88
  • DOI: 10.1016/j.jcrysgro.2016.04.036
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Growth of Shape-controlled Ce:Y3Al5O12 Scintillator Crystal and their Scintillation Properties (2016)
  • Author(s): Yuui Yokota, Shunsuke Kurosawa, Yuji Ohasi, Kei Kamada, Akira Yoshikawa
  • Journal Title: Journal of crystal growth Volume: 452 Pages: 69-72
  • DOI: 10.1016/j.jcrysgro.2016.02.041
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Luminescence quenching and scintillation response in the Ce3+ doped GdxY3-xAl5O12 (x = 0.75, 1, 1.25, 1.5, 1.75, 2) single crystals (2016)
  • Author(s): K. Bartosiewicz, V. Babin, K. Kamada, A. Yoshikawa, J.A. Mares, A. Beitlerova, M. Nikl
  • Journal Title: Optical Materials Volume: 63 Pages: 134-142
  • DOI: 10.1016/j.optmat.2016.05.041
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Probing shallow electron traps in cerium doped Gd3Al2Ga3O12 scintillators by UV-induced absorption spectroscopy (2016)
  • Author(s): Mamoru Kitaura, Kei Kamada, Shunsuke Kurosawa, Junpei Azuma, Akimasa Ohnishi, and Kazuhiko Hara
  • Journal Title: Applied Physics Express Volume: 9 Issue: 7 Pages: 072602-072602
  • DOI: 10.7567/apex.9.072602
  • NAID: 210000137977
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Co-doping effects on luminescence and scintillation properties of Ce doped (Lu,Gd)3(Ga,Al)5O12 scintillator (2016)
  • Author(s): Hiroaki Yamaguchi, Kei Kamada, Shunsuke Kurosawa, Jan Pejchal, Yasuhiro Shoji, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
  • Journal Title: Optical Materials Volume: 61 Pages: 129-133
  • DOI: 10.1016/j.optmat.2016.05.025
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Large Size Czochralski Growth and Scintillation Properties of Mg2+ Co-doped Ce :Gd3Ga3Al2O12 (2016)
  • Author(s): Kei Kamada, Yasuhiro Shoji, Vladimir V. Kochurikhin, Aya Nagura, Satoshi Okumura, Seiichi Yamamoto, Jung Yeol Yeom, Shunsuke Kurosawa, Jan Pejchal, Yuui Yokota, Yuji Ohashi, Martin Nikl, Masao Yoshino, and Akira Yoshikawa
  • Journal Title: IEEE Transactions on Nuclear Science Volume: 63 Pages: 443-447
  • DOI: 10.1016/j.jcrysgro.2016.11.026
  • Peer Reviewed / Int'l Joint Research
• [Presentation] シンチレータ結晶の魅力 (2019)
  • Author(s): 鎌田圭
  • Organizer: 関東核医学画像処理研究会2019
  • Invited
• [Presentation] 鉄-アルミニウム系合金結晶の形状制御作製と磁気特性評価 (2019)
  • Author(s): 鎌田 圭, 村上 力輝斗, 荒川 元孝, 南谷 保, 上野 敏幸, 庄子 育宏, 山路 晃弘, 吉野 将生, 黒澤 俊介, 横田 有為, 大橋 雄二, 吉川 彰
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] CeBr3シンチレータ単結晶の大型化とアッセンブリ技術の開発 (2019)
  • Author(s): 鎌田 圭, 吉野 将生, 庄子 育宏, 山路 晃弘, 黒澤 俊介, 横田 有為, 大橋 雄二, 島添 健次, 高橋 美和子, 羽場 宏光, 百瀬 敏光, 高橋 浩之, 吉川彰
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] Mo and W co-doping effects on Ce doped garnet scintillators (2018)
  • Author(s): Kei Kamada, Kyoung Jin Kim, Masao Yoshino, Yasuhiro Shoji, Vladimir V. Kochurikhin, Aya Nagura, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Martin Nikl, Akira Yoshikawa
  • Organizer: The 5th International Conference on the Physics of Optical Materials and Devices
  • Int'l Joint Research
• [Presentation] Scintillation properties of undoped and Eu-doped Ca(Br,I)2 single crystals (2018)
  • Author(s): Kei Kamada, Takashi Iida, Yuki Furuya, Masao Yoshino4, Kyoung Jin Kim, Yasuhiko Shoji, Rikito Murakami, Akihiro Yamaji, Shunsuke Kurosawa, Yuji Ohashi, Yuui Yokota, and Akira Yoshikawa
  • Organizer: 10th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation
  • Int'l Joint Research
• [Presentation] Development of growth technique for Tb doped GdAlO3/α-Al2O3 eutectic scintillator (2018)
  • Author(s): Kei Kamada, Hiroaki Yamaguchi, Akihiro Yamaji, Masao Yoshino, Shunsuke Kurosawa, Yasuhiro Shoji, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
  • Organizer: Sixth European Conference on Crystal Growth
  • Int'l Joint Research
• [Presentation] Crystal growth and scintillation properties of Eu doped Ca(BrxI1-x)2 (2018)
  • Author(s): K. Kamada, T. Iida, K. Kim, M. Yoshino, R. Murakami, Y. Furuya, A. Yamaji, S. Kurosawa, Y. Yokota, Y. Ohashi, A. Yoshikawa
  • Organizer: 2018 IEEE Nuclear science Symposium and Medical Imaging Conference
  • Int'l Joint Research
• [Presentation] Edge defined Film Fed Growth法によるCe添加YAlO3単結晶作製技術の開発 (2018)
  • Author(s): 鎌田 圭、古滝 敏郎、宮崎 真行、吉野 将生、山路 晃弘、黒澤 俊介、庄子 育宏、横田 有為、大橋 雄二、吉川 彰
  • Organizer: 第79回応用物理学会 秋季学術講演会
• [Presentation] EFG法による酸化物シンチレータ単結晶の形状制御育成 (2018)
  • Author(s): 鎌田圭、古滝敏郎、斎藤弘倫、 堀越文弥、宮崎真行、吉野将生、 山路晃広、黒澤俊介、庄子育宏、 横田有為、大橋雄二、吉川彰
  • Organizer: 第47回結晶成長国内会議
• [Presentation] Moルツボを用いたEdge defined Film Fed Growth法によるシンチレータ単結晶作製技術の開発 (2018)
  • Author(s): 鎌田 圭, 古滝 敏郎, 宮崎 真行, 吉野 将生, 山路 晃弘, 黒澤 俊介, 庄子 育宏, 横田 有為, 大橋 雄二, 吉川 彰
  • Organizer: 第65回応用物理学会春季学術講演会
• [Presentation] Czochralski Growth And Scintillation Properties of Ce Doped Gadolinium Scandium Aluminium Garnet Single Crystals (2017)
  • Author(s): Kei Kamada, Vladimir Kochurikhin, Shunsuke Kurosawa, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa
  • Organizer: 21st American Conference on Crystal Growth and Epitaxy (ACCGE-21)
  • Int'l Joint Research
• [Presentation] Shaped crystal growth of novel oxide scintillators by the edge defined film fed growth method (2017)
  • Author(s): Kei Kamada, Toshiro Kotaki, Masayuki Miyazaki, Yasuhiro Shoji, Akihiro Yamaji, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
  • Organizer: 14th International conference on Scintillating Materials and their Applications
  • Int'l Joint Research
• [Presentation] Growth of large size Tb doped GdAlO3/a-Al2O3 eutectic by micro pulling down method for X-ray phase imaging. (2017)
  • Author(s): Kei Kamada, Hiroaki Yamaguchi, Akihiro Yamaji, Masao Yoshino, Shunsuke Kurosawa, Yasuhiro Shoji, Yuui Yokota,Yuji Ohashi, Akira Yoshikawa
  • Organizer: The7th Asian Conference On Crystal Growth and Crystal Technology (CGCT-7)
  • Int'l Joint Research / Invited
• [Presentation] Development of X-ray Talbot-Lau imaging scanner using the large area Tb:GdAlO3/Al2O3 eutectic scintillator plate (2017)
  • Author(s): Kamada, H. Yamaguchi, A. Yamaji, S. Kurosawa, Y. Shoji, Y. Yokota, Y. Ohashi, A. Yoshikawa
  • Organizer: 2017 the IEEE Nuclear Science Symposium / the IEEE Medical Imaging Conference
  • Int'l Joint Research
• [Presentation] Bulk Single Crystal Growth of Ca(F, Cl, Br, I)2 Scintillators (2017)
  • Author(s): K. Kamada, T. Iida, T. Ohata, M. Yoshino, S. Hayasaka, Y. Shoji, S. Sakuragi, S. Kurosawa, Y. Yokota, Y. Ohashi, A. Yoshikawa
  • Organizer: 2017 the IEEE Nuclear Science Symposium / the IEEE Medical Imaging Conference
  • Int'l Joint Research
• [Presentation] Melt growth of Eu doped ZnAl2O4 single crystals by micro-pulling down method and their luminescence properties (2017)
  • Author(s): ei Kamada, R. Murakami, M. Yoshino, Y. Shoji, V.V. Kochurikhin, A. Yamaji, S. Kurosawa, Y. Ohashi, Y. Yokota, A. Yoshikawa
  • Organizer: 7th International Workshop on PHOTOLUMINESCENCE IN RARE EARTHS : PHOTONIC MATERIALS AND DEVICES (PRE'17)
  • Int'l Joint Research
• [Presentation] Ce添加LaBr3/AEBr2(AE=Mg, Ca, Sr, Ba)共晶体シンチレータの作製と特性評価 (2017)
  • Author(s): 鎌田 圭, 古谷 優貴, 山路 晃広, 庄子 育宏,黒澤 俊介, 横田 有為, 大橋 雄二, 吉川 彰
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] アルカリ金属共添加Ce:Gd3(Ga,Al)5O12のシンチレータ特性均一性制御と大型単結晶作製技術の開発 (2017)
  • Author(s): 鎌田 圭, 庄子 育宏, Vladimir V.Kochurikhin, 吉野 将生, 村上 力輝斗, 黒澤 俊介, 山路 晃広, 横田 有為, 大橋 雄二, 吉川彰
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] Ca(BrxI1-x)2シンチレータ (2017)
  • Author(s): 鎌田圭
  • Organizer: Scintillator for Medical, Astroparticle and environmental Radiation Technologies (SMART2017)
  • Invited
• [Presentation] Mg Co-Doping Effects on Multi Component Garnet of Ce:(Lu,Gd,Y)3(Ga,Al)5O12 Single Crystal Scintillators (2016)
  • Author(s): K. Kamada, H. Chiba, Y. Shoji, S. Kurosawa, Y. Yokota, Y. Ohashi, A. Yoshikawa
  • Organizer: 2016 the IEEE Nuclear Science Symposium / the IEEE Medical Imaging Conference
  • Place of Presentation: Strasbourg, France
  • Year and Date: 2016-10-29
  • Int'l Joint Research
• [Presentation] Luminescence and dosimeter properties of Mg and Ce co-doped Gd3(Ga,Al)5O12 single crystals (2016)
  • Author(s): Kei Kamada1, Shunsuke Kurosawa, Mamoru Kitaura, Aya Nagura, Yasuhiro Shoji, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
  • Organizer: 18th International Conference on Solid State Dosimetry
  • Place of Presentation: Munich, Germany
  • Year and Date: 2016-07-03
  • Int'l Joint Research
• [Presentation] Czochralski growth and luminescence properties of Ce:Gd3(Sc, Al)5O12 scintillator (2016)
  • Author(s): Kei Kamada, Yasuhiro Shoji, Vladimir V. Kochurikhin, Shunsuke Kurosawa, Yuji Ohashi, Yuui Yokota, and Akira Yoshikawa
  • Organizer: 7th International Conference on Optical, Optoelectronic and Photonic Materials and Applications
  • Place of Presentation: Montreal, Canada
  • Year and Date: 2016-06-13
  • Int'l Joint Research
• [Patent(Industrial Property Rights)] 蛍光体 (2019)
  • Inventor(s): 鎌田 圭、吉川 彰、横田 有為、黒澤 俊介
  • Industrial Property Rights Holder: 鎌田 圭、吉川 彰、横田 有為、黒澤 俊介
  • Industrial Property Rights Type: 特許
  • Filing Date: 2019
  • Overseas
• [Patent(Industrial Property Rights)] 蛍光体 (2018)
  • Inventor(s): 鎌田 圭、吉川 彰、黒澤 俊介、横田 有為
  • Industrial Property Rights Holder: 鎌田 圭、吉川 彰、黒澤 俊介、横田 有為
  • Industrial Property Rights Type: 特許
  • Filing Date: 2018
• [Patent(Industrial Property Rights)] 蛍光体 (2018)
  • Inventor(s): 鎌田 圭、吉川 彰、横田 有為、黒澤 俊介、 金 敬鎮、等
  • Industrial Property Rights Holder: 鎌田 圭、吉川 彰、横田 有為、黒澤 俊介、 金 敬鎮、等
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2018-037900
  • Filing Date: 2018
• [Patent(Industrial Property Rights)] 発光体及び発光体の製造方法 (2017)
  • Inventor(s): 古滝 敏郎、斎藤 弘倫、堀越 文弥、宮崎 真行、 鎌田 圭、等
  • Industrial Property Rights Holder: 古滝 敏郎、斎藤 弘倫、堀越 文弥、宮崎 真行、 鎌田 圭、等
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-180019
  • Filing Date: 2017
• [Patent(Industrial Property Rights)] 放射線像撮影装置 (2017)
  • Inventor(s): 島添 健次、吉野 将生、鎌田 圭、吉川
  • Industrial Property Rights Holder: 島添 健次、吉野 将生、鎌田 圭、吉川
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-251106
  • Filing Date: 2017
• [Patent(Industrial Property Rights)] 結晶材料、放射線検出器、非破壊検査装置、および撮像装置 (2017)
  • Inventor(s): 吉川 彰、横田 有為、高杉 樹、鎌田 圭、黒澤 俊介、等
  • Industrial Property Rights Holder: 吉川 彰、横田 有為、高杉 樹、鎌田 圭、黒澤 俊介、等
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-170685
  • Filing Date: 2017
• [Patent(Industrial Property Rights)] 高周波発生装置、加熱・溶融装置、および結晶作製装置 (2017)
  • Inventor(s): 吉川 彰、鎌田 圭、等
  • Industrial Property Rights Holder: 吉川 彰、鎌田 圭、等
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-091580
  • Filing Date: 2017