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Breaking of the World record of light yield for Eu:SrI2 scintillator by control of valence using co-dopant

Research Project

Project/Area Number 25600130
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field General applied physics
Research InstitutionTohoku University

Principal Investigator

YOSHIKAWA Akira  東北大学, 金属材料研究所, 教授 (50292264)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsハロゲン化物 / シンチレータ / 単結晶 / ガンマ線シンチレータ / シンチレータ単結晶
Outline of Final Research Achievements

Eu:SrI2 with high light yield and energy resolution have been investigated as a next-generation scintillator. We developed the novel crystal growth method for Eu:SrI2 single crystals and the crystals could be grown. However, the I vacancy in the crystal which is generated during crystal growth deteriorate the scintillation properties. Therefore, in this study, we grew trivalent cations (La, Gd, Lu) co-doped Eu:SrI2 single crystals and their scintillation properties were investigated.
La co-doped Eu:SrI2 crystals included maximum concentration of co-dopant. However, light yield of La co-doped Eu:SrI2 crystals decreased and the decrease of light yield was considered to be due to the decrease of light around 435 nm by an increase of emission around 500 nm.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (8 results)

All 2014 2013

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 3 results) Presentation (5 results) (of which Invited: 1 results)

  • [Journal Article] Effects of La, Gd, or Lu Co-doping on Crystal Growth and Scintillation Properties of Eu:SrI2 Single Crystals2014

    • Author(s)
      Kei Nishimoto, Yuui Yokota, Shunsuke Kurosawa, Jan Pejchal, Kei Kamada, Valery Chani, Akira Yoshikawa
    • Journal Title

      Journal of Crystal Growth

      Volume: 401 Pages: 484-488

    • DOI

      10.1016/j.jcrysgro.2014.02.022

    • Related Report
      2014 Annual Research Report 2013 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Eu Concentration Dependence on Scintillation Properties of Eu doped SrI2 Single Crystals Grown by Modified Micro-Pulling-Down Method2014

    • Author(s)
      Kei Nishimoto, Yuui Yokota, Shunsuke Kurosawa, Kei Kamada, Yutaka Fujimoto, Takahiro Kojima, Fumio Nitanda, Yasunori Furukawa, Akira Yoshikawa
    • Journal Title

      Optical Materials

      Volume: 36 Issue: 12 Pages: 1946-1949

    • DOI

      10.1016/j.optmat.2014.02.026

    • Related Report
      2014 Annual Research Report 2013 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Growth of Eu:SrI2 Bulk Crystals and their Scintillation Properties2014

    • Author(s)
      Yuui Yokota, Shunsuke Kurosawa, Kei Nishimoto, Kei Kamada, Akira Yoshikawa
    • Journal Title

      Journal of Crystal Growth

      Volume: 401 Pages: 343-346

    • DOI

      10.1016/j.jcrysgro.2014.02.031

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Effects of codoping on Scintillation Properties of Eu:SrI2 Single Crystals2013

    • Author(s)
      Kei Nishimoto, Yuui Yokota, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa Yoshikawa
    • Organizer
      ICCGE-17
    • Place of Presentation
      Warsaw, Poland
    • Related Report
      2013 Research-status Report
  • [Presentation] Crystal Growth of Eu doped SrI2 Scintillator and their Scintillation Properties2013

    • Author(s)
      Yuui Yokota, Kei Nishimoto, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa
    • Organizer
      ISLNOM-6
    • Place of Presentation
      Shanghai, China
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] Eu Concentration Dependence on Scintillation Properties of Eu doped SrI2 Single Crystals Grown by Modified Micro-Pulling-Down Method2013

    • Author(s)
      Kei Nishimoto, Yuui Yokota, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa
    • Organizer
      ISLNOM-6
    • Place of Presentation
      Shanghai, China
    • Related Report
      2013 Research-status Report
  • [Presentation] Scintillation Properties of rare-earth co-doped Eu:SrI2 Single Crystals Grown by the Moisture Controlled Micro-Pulling-Down Method2013

    • Author(s)
      Kei Nishimoto, Yuui Yokota, Shunsuke Kurosawa, Kei Kamada and Akira Yoshikawa
    • Organizer
      2013 IEEE NSS/MIC/RTSD
    • Place of Presentation
      Gangnam, Seoul, Republic of Korea
    • Related Report
      2013 Research-status Report
  • [Presentation] Recent study on scintillation materials - oxide and halide crystal2013

    • Author(s)
      Akira Yoshikawa, Shunsuke Kurosawa, Yuui Yokota, Kei Kamada, Jan Pejchal, Yasuhiro Shoji, Hisakazu Nagato, Shoki Hayasaka, Akihiro Yamaji, Akira Suzuki, Shotoro Suzuki, Mafuyu Seki, Nishimoto Kei, Tetsuo Kudo, Kosuke Hishinuma
    • Organizer
      IWIRM9
    • Place of Presentation
      Oarai, Japan
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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