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Creation of high-performance scintillator and semi-conductor crystals by fusion of fields

Research Project

Project/Area Number 21KK0082
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionTohoku University

Principal Investigator

Yuui Yokota  東北大学, 金属材料研究所, 准教授 (60517671)

Co-Investigator(Kenkyū-buntansha) 豊田 智史  東北大学, 未来科学技術共同研究センター, 准教授 (20529656)
吉野 将生  東北大学, 未来科学技術共同研究センター, 助教 (30789938)
Project Period (FY) 2021-10-07 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2023: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2022: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Keywordsシンチレータ / 単結晶 / 共晶体 / 高融点 / ハロゲン化物 / ナノ構造化
Outline of Research at the Start

研究代表が独自開発した高速結晶製造技術と国際共同研究の海外連携先(チェコ物理研)が有する高度光学材料評価技術と光学メカニズム解明、若手研究者が有する放射線物理に基づいた高度デバイス設計技術を融合させることで、次世代の高度医療機器や環境測定機器に搭載される高特性シンチレータ単結晶の大規模材料探索とデバイス化を実現する。研究期間内に高融点酸化物・ハロゲン化物ナノ構造化シンチレータ結晶材料において10種類以上の新材料を発見し、その中で次世代の高度医療機器や環境測定機に繋がる高特性新規結晶材料を新たに創出する。

Outline of Final Research Achievements

By advanced melt-growth technologies, we have developed eutectic scintillator crystals using self-assembly at the eutectic composition and oxide scintillator single crystals with high melting points. Several new crystals could be developed by the material research. The mechanism of luminescence was elucidated. As for the eutectic scintillator crystals, we succeeded in line imaging in an imaging system with a resolution of less than 1 μm. In the oxide scintillator single crystals with high melting point, we developed the scintillator single crystal with ultra high density of 9.7 g/cm3, which is far superior to existing materials.

Academic Significance and Societal Importance of the Research Achievements

未探索領域であった高融点の酸化物材料のシンチレータとハロゲン化物シンチレータの共晶体結晶に関して材料探索および物性解明を行ったことで、既存材料を凌駕する高密度シンチレータを開発することができ、既存材料の代替によるPbフリー化やより効率的な高エネルギー放射線の計測が期待される。開発した共晶体ハロゲン化物シンチレータ結晶においても、その作製と評価を行い、空間分解能に優れた放射線検出器の実現に向けた材料開発を進めることができた。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (32 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (18 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results) Book (1 results) Patent(Industrial Property Rights) (2 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] チェコ物理研(チェコ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] IP of CAS(チェコ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] IKZ(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] IP of CAS(チェコ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Crystal growth, luminescence, and scintillation properties of Er-doped La<sub>2</sub>Hf<sub>2</sub>O<sub>7</sub> single crystal2024

    • Author(s)
      Hayashi Naomoto、Yokota Yuui、Horiai Takahiko、Yamanoi Kohei、Yoshino Masao、Yamaji Akihiro、Murakami Rikito、Hanada Takashi、Sato Hiroki、Ohashi Yuji、Kurosawa Shunsuke、Kamada Kei、Sarukura Nobuhiko、Yoshikawa Akira
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 63 Issue: 3 Pages: 03SP15-03SP15

    • DOI

      10.35848/1347-4065/ad1e97

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Growth of Mg2Si thermoelectric eutectics by unidirectional solidification2024

    • Author(s)
      Hayashi Naomoto、Yokota Yuui、Horiai Takahiko、Yoshino Masao、Yamaji Akihiro、Murakami Rikito、Hanada Takashi、Sato Hiroki、Ohashi Yuji、Kurosawa Shunsuke、Kamada Kei、Yoshikawa Akira
    • Journal Title

      Journal of Crystal Growth

      Volume: 627 Pages: 127533-127533

    • DOI

      10.1016/j.jcrysgro.2023.127533

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optical and scintillation properties of Pr3+-doped (La, Y)2Si2O7 single crystals2024

    • Author(s)
      Abe Yuka、Horiai Takahiko、Pejchal Jan、Yokota Yuui、Yoshino Masao、Murakami Rikito、Hanada Takashi、Yamaji Akihiro、Sato Hiroki、Ohashi Yuji、Kurosawa Shunsuke、Kamada Kei、Yoshikawa Akira、Nikl Martin
    • Journal Title

      Optical Materials: X

      Volume: 22 Pages: 100318-100318

    • DOI

      10.1016/j.omx.2024.100318

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relationship between crystal structure and acoustic physical properties of Ca3B(Ga,Al)3Si2O14 [B =?Nb, Ta] piezoelectric single crystals2023

    • Author(s)
      Yokota Yuui、Ohashi Yuji、Horiai Takahiko、Yoshikawa Akira
    • Journal Title

      Materials Today Communications

      Volume: 37 Pages: 107506-107506

    • DOI

      10.1016/j.mtcomm.2023.107506

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of chemical composition control of colquiriite-type neutron scintillator single crystals2023

    • Author(s)
      Yokota Yuui、Horiai Takahiko、Yoshikawa Akira
    • Journal Title

      Journal of Solid State Chemistry

      Volume: 324 Pages: 124127-124127

    • DOI

      10.1016/j.jssc.2023.124127

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development and x-ray imaging performance of Tb-doped GdAlO<sub>3</sub>-<i>α</i>Al<sub>2</sub>O<sub>3</sub> submicron-diameter phase-separated scintillator fibers2023

    • Author(s)
      Yoshino M.、Kamada K.、Yamamoto S.、Yajima R.、Sasaki R.、Sagisaka M.、Kataoka J.、Horiai T.、Yokota Y.、Yoshikawa A.
    • Journal Title

      AIP Advances

      Volume: 13 Issue: 2 Pages: 025364-025364

    • DOI

      10.1063/5.0136069

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Crystal growth and optical properties of Ce-doped (Y, Lu)AlO<sub>3</sub> single crystal2022

    • Author(s)
      Horiai Takahiko、Pejchal Jan、Paterek Juraj、Kucerkova Romana、Yokota Yuui、Yoshikawa Akira、Nikl Martin
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 7 Pages: 072002-072002

    • DOI

      10.35848/1347-4065/ac7271

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] X線イメージング用GAGG:Ce単結晶シンチレータプレートの特性評価2024

    • Author(s)
      吉野 将生、山本 誠一、矢島 隆雅、鎌田 圭、越川 七星、片岡 淳、横田 有為、吉川 彰
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] シンチレータ単結晶材料のこれまでの開発と最近の動向2023

    • Author(s)
      横田有為
    • Organizer
      第27回結晶工学セミナー バルク結晶成長の基礎と応用
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Functional crystals with eutectic morphology -Scintillator and thermoelectric material-2023

    • Author(s)
      Yuui Yokota
    • Organizer
      International Workshop on Recent Advances in Thermoelectric Materials & Device Development
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Advanced Melt-Growth Method for Shape-Controlled Functional Single Crystals2023

    • Author(s)
      Yuui Yokota
    • Organizer
      International Conference on Materials Science, Engineering & Technology (ICMSET)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Innovative crystal growth method and functional optical single crystals2023

    • Author(s)
      Yuui Yokota
    • Organizer
      Joint Conference International Congress and Expo on Optics, Photonics and Lasers (EUROPL2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 育成雰囲気がCe3+添加 (Gd, La)2Si2O7単結晶のシンチレーション特性へ及ぼす影響2023

    • Author(s)
      阿部 柚佳、堀合 毅彦、横田 有為、吉野 将生、村上 力輝斗、花田 貴、山路 晃広、佐藤 浩樹、大橋 雄二、黒澤 俊介、鎌田 圭、吉川 彰
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Pr3+添加(La,Y)2Si2O7バルク単結晶の光学およびシンチレーション特性2023

    • Author(s)
      阿部 柚佳、堀合 毅彦、横田 有為、吉野 将生、村上 力輝斗、花田 貴、山路 晃広、佐藤 浩樹、大橋 雄二、黒澤 俊介、鎌田 圭、吉川 彰
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Ce添加GdScO3へのY置換による結晶構造および光学特性の影響2023

    • Author(s)
      堀合毅彦,横田有為,吉野将生,Talgat Inerbaev,川添良幸,吉川彰
    • Organizer
      第52回結晶成長国内会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] Wるつぼを使用したマイクロ引き下げ法によるEu3+添加(Y,Lu)ScO3の結晶育成2023

    • Author(s)
      阿部 柚佳、堀合 毅彦、横田 有為、吉野 将生、村上 力輝斗、花田 貴、山路 晃広、佐藤 浩樹、大橋 雄二、黒澤 俊介、鎌田 圭、吉川 彰
    • Organizer
      第52回結晶成長国内会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] Crystal growth of Eu-doped (Y, Lu)ScO3 by micro-pulling-down method using W crucible2023

    • Author(s)
      Yuka Abe, Takahiko Horiai, Yuui Yokota, Masao Yoshino, Rikito Murakami, Takashi Hanada, Akihiro Yamaji, Hiroki Sato, Yuji Ohashi, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa
    • Organizer
      Development of Materials Science in Research and Education
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crystal growth and optical characterization of Ce-doped mixed rare-earth sesquioxide single crystals for scintillator applications2023

    • Author(s)
      Takahiko Horiai, Yuui Yokota, Masao Yoshino, Akira Yoshikawa
    • Organizer
      Development of Materials Science in Research and Education
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth of La2Zr2O7 and La2Hf2O7 Single Crystals with High Melting Point by Novel Growth Method and their Luminescent Properties2022

    • Author(s)
      Yuui Yokota, Takahiko Horiai, Naomoto Hayashi, Masao Yoshino, Akira Yoshikawa
    • Organizer
      The 6th International Conference on the Physics of Optical Materials and Devices (ICOM2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 2200℃を超える高融点酸化物の単結晶育成技術開発2022

    • Author(s)
      横田有為, 堀合毅彦, 林直志, 吉川彰
    • Organizer
      第16回日本フラックス成長研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] W坩堝を用いたマイクロ引き下げ法による高融点酸化物単結晶の結晶作製技術開発2022

    • Author(s)
      横田有為, 須田貴裕, 堀合毅彦, 吉野将生, 吉川彰
    • Organizer
      2022年第69回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Crystal Growth of Ce-doped (Gd,Y)ScO3 Scintillators by Micro-Pulling-Down Method and Their Optical Properties2022

    • Author(s)
      Takahiko Horiai, Christo Guguschev, Yuui Yokota, Masao Yoshino, Jan Pejchal, Akira Yoshikawa
    • Organizer
      The 6th International Conference on the Physics of Optical Materials and Devices (ICOM2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Er添加La2Hf2O7の結晶育成と光学特性2022

    • Author(s)
      林直志、横田有為、堀合毅彦、山ノ井航平、吉野将生、山路晃広、村上力輝斗、花田貴、佐藤浩樹、豊田智史、大橋雄二、黒澤 俊介、鎌田圭、猿倉信彦、吉川彰
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Ce添加(Gd,Y)ScO3の単結晶育成および光学特性2022

    • Author(s)
      堀合毅彦、Guguschev Christo、Ganschow Steffen、吉野将生、横田有為、吉川彰
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Crystal growth and optical properties of Er-doped La2Hf2O7 by micro-pulling-down method2022

    • Author(s)
      Naomoto Hayashi, Yuui Yokota, Takahiko Horiai, c, Masao Yoshino, Akihiro Yamaji, Rikito Murakami, Takashi Hanada, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa
    • Organizer
      The 6th International Conference on the Physics of Optical Materials and Devices (ICOM2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Book] 液相からの結晶成長入門-育成技術と評価方法-2021

    • Author(s)
      日本フラックス成長研究会、吉川 彰、横田 有為、我田 元
    • Total Pages
      216
    • Publisher
      日刊工業新聞社
    • ISBN
      9784526081774
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 結晶材料、シンチレータ、および放射線検出器2023

    • Inventor(s)
      横田有為、須田貴裕、堀合毅彦、吉野将生、鎌田圭、吉川彰
    • Industrial Property Rights Holder
      横田有為、須田貴裕、堀合毅彦、吉野将生、鎌田圭、吉川彰
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 結晶材料、シンチレータ、および放射線検出器2022

    • Inventor(s)
      横田有為、須田貴裕、堀合毅彦、吉野将生、鎌田圭、吉川彰
    • Industrial Property Rights Holder
      横田有為、須田貴裕、堀合毅彦、吉野将生、鎌田圭、吉川彰
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-092879
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report

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Published: 2021-10-22   Modified: 2025-01-30  

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