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Study of the history of the Universe using high-light-yield scintillators

Research Project

Project/Area Number 18H01222
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionUniversity of Tsukuba

Principal Investigator

Iida Takashi  筑波大学, 数理物質系, 助教 (40722905)

Co-Investigator(Kenkyū-buntansha) 小川 泉  福井大学, 学術研究院工学系部門, 准教授 (20294142)
吉野 将生  東北大学, 金属材料研究所, 助教 (30789938)
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) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2020: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2018: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywordsニュートリノ / 暗黒物質 / 無機シンチレータ / ヨウ化カルシウム / 低温特性 / 波形弁別能 / 二重ベータ崩壊 / 粒子識別 / 波形弁別
Outline of Final Research Achievements

We have developed a calcium iodide (CaI2 ) scintillator and aim to launch the sensitive dark matter search and double beta decay search experiment using it in the future. In order to increase the sensitivity of experiments, three pillars are generally important: low threshold and high resolution, large size, and low background (BG). We have succeeded in producing CaI2 crystals with a luminous intensity 2.7 times higher than that of NaI(Tl), demonstrating that low threshold and high resolution can be achieved. As for the larger size crystal, a dedicated CaI2 furnace was set up, and 2-inch size crystals were developed. We also conducted basic research on low BG technology using waveform discrimination method, and demonstrated very high particle discrimination ability of CaI2.

Academic Significance and Societal Importance of the Research Achievements

本研究では、暗黒物質探索や二重ベータ崩壊研究といった基礎物理の研究に利用可能な大発光量のCaI2シンチレータ開発に取り組んだ。これらの研究を行うためには、低閾値・高分解能、大型、 低バックグラウンドの検出器が必要となる。本研究により、大型結晶の育成と低バックグラウンド技術の確立に成功した。この新たなシンチレータは、我々の目指す基礎物理実験のみならず、エネルギーや医療といった実用的な分野でも利用できる可能性がある。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (21 results)

All 2021 2020 2019 2018

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (15 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results)

  • [Journal Article] The energy calibration system for CANDLES using (n,γ) reaction2021

    • Author(s)
      Iida T.、Mizukoshi K.、Ohata T.、et al (CANDLES Collaboration)
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 986 Pages: 164727-164727

    • DOI

      10.1016/j.nima.2020.164727

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] R&D of new high-performance scintillator including double beta decay nuclei2020

    • Author(s)
      T. Iida, K. Kamada, M. Yoshino, K. J. Kim, S. Kurosawa and A. Yoshikawa
    • Journal Title

      Proceeding of 2019 IEEE NSS/MIC

      Volume: 1 Pages: 1-3

    • DOI

      10.1109/nss/mic42101.2019.9059845

    • Related Report
      2020 Annual Research Report
  • [Journal Article] High-light-yield calcium iodide (CaI2) scintillator for astroparticle physics2020

    • Author(s)
      Iida Takashi、Kamada Kei、Yoshino Masao、Kim Kyoung Jin、Ichimura Koichi、Yoshikawa Akira
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 958 Pages: 162629-162629

    • DOI

      10.1016/j.nima.2019.162629

    • NAID

      120007132747

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Crystal growth and scintillation properties of Eu-doped Ca(BrxI1-x)2 crystals2019

    • Author(s)
      Kamada Kei、Iida Takashi、Furuya Yuki、Kim Kyoung Jin、Yoshino Masao、Murakami Rikito、Shoji Yasuhiro、Kochurikhin Vladimir V.、Yamaj Akihiro、Kurosawa Shunsuke、Ohashi Yuji、Yokota Yuui、Yoshikawa Akira
    • Journal Title

      Radiation Measurements

      Volume: 127 Pages: 106139-106139

    • DOI

      10.1016/j.radmeas.2019.106139

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Pulse-shape discrimination potential of new scintillator material: La-GPS:Ce2019

    • Author(s)
      K. Mizukoshi, T. Iida, I. Ogawa, K. Shimizu, S. Kurosawa, K. Kamada, M. Yoshino and A. Yoshikawa
    • Journal Title

      Journal of Instrumentation

      Volume: 14 Issue: 06 Pages: P06037-P06037

    • DOI

      10.1088/1748-0221/14/06/p06037

    • NAID

      120007133392

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 二重ベータ崩壊探索実験のための新規シンチレータ開発 ~ Development of new scintillator for wdouble beta decay search ~2019

    • Author(s)
      Takashi Iida, Kei Kamada, Kyoung Jin Kim, Shunsue Kurosawa, Keita Mizukoshi, Izumi Ogawa, Kensei Shimizu, Masao Yoshino, Akira Yoshikawa
    • Journal Title

      Proceedings of the 33th Workshop on Radiation Detectors and Their Uses

      Volume: 1 Pages: 42-50

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Lecture on Neutrino-less double beta decay2020

    • Author(s)
      Takashi Iida
    • Organizer
      Vietnam School on Neutrinos (VSON) 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 20.Development of calcium iodide (CaI2) scintillator for the study of double beta decay of 48Ca2019

    • Author(s)
      Takashi Iida, Kei Kamada, Masao Yoshino, Kyoung Jin Kim, Akira Yoshikawa
    • Organizer
      15th International Conference on Scintillating Materials and their Applications (SCINT2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 22.R&D of new high-performance scintillators including double beta decay nuclei2019

    • Author(s)
      Takashi Iida, Kei Kamada, Masao Yoshino, Kyoung Jin Kim, Shunsuke Kurosawa, Akira Yoshikawa,
    • Organizer
      IEEE NSS-MIC 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 宇宙史研究のためのCaI2シンチレータ開発の現状III ~波形弁別能の研究~2019

    • Author(s)
      飯田崇史、鎌田圭、吉野将生、K. J. Kim
    • Organizer
      日本物理学会 秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Particle identification capability of Ca(Br, I)2 scintillators for low background experiments2019

    • Author(s)
      Masao Yoshino, Takashi Iida, Kei Kamada, Kyoung Jin Kim, and Akira Yoshikawa
    • Organizer
      Topics in Astroparticle and Underground Physics (TAUP2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 無機シンチレータを用いた160Gdと96Zrの二重ベータ崩壊の探索2019

    • Author(s)
      飯田崇史、吉野将生、水越彗太
    • Organizer
      Scintillator for Medical, Astroparticle and environmental Radiation Technologies (SMART2019)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Pulse-shape discrimination potential of Ce:La-GPS and its property in low temperature2019

    • Author(s)
      K. Mizukoshi, T.Iida, I. Ogawa, K. Shimizu, S. Kurosawa, K. Kamada, M. Yoshino and A. Yoshikawa
    • Organizer
      15th International Conference on Scintillating Materials and their Applications (SCINT2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High light yield calcium iodide (CaI2) detector for astroparticle physics2019

    • Author(s)
      Takashi Iida, Kei Kamada, Masao Yoshino, Kyoung Jin Kim
    • Organizer
      The 15th Vienna Conference on Instrumentation (VCI2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 新規シンチレータによるニュートリノ物理2018

    • Author(s)
      飯田崇史
    • Organizer
      Scintillator for Medical, Astroparticle and Environmental Radiation Techniques II (SMART2018)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 新規高性能シンチレータによる宇宙史研究2018

    • Author(s)
      飯田崇史
    • Organizer
      関西学院大学理工学部講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 二重ベータ崩壊探索実験のための新規シンチレータ開発2018

    • Author(s)
      飯田崇史、鎌田圭、吉野将生、Kyoung Jin Kim
    • Organizer
      第33回「放射線検出器とその応用」研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 宇宙史研究のためのCaI2シンチレータ開発の現状II2018

    • Author(s)
      飯田崇史、鎌田圭、吉野将生、K.J.Kim
    • Organizer
      日本物理学会 秋季大会 信州大学
    • Related Report
      2018 Annual Research Report
  • [Presentation] Scintillation properties of undoped and Eu-doped Ca(Br,I)2 single crystals2018

    • Author(s)
      Kei Kamada, Takashi Iida, Yuki Furuya, Masao Yoshino, 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 (LumDeTr '18)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crystal growth and scintillation properties of Eu doped Ca(BrxI1-x)22018

    • 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
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CaI2シンチレーターの特性測定2018

    • Author(s)
      高橋光太郎
    • Organizer
      Scintillator for Medical, Astroparticle and environmental Radiation Technologies (SMART2019)
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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