• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of positron age-momentum correlation measurement using ultra-short pulsed gamma rays and promotion of utilization research

Research Project

Project/Area Number 21H03740
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 80040:Quantum beam science-related
Research InstitutionInstitute for Molecular Science

Principal Investigator

Taira Yoshitaka  分子科学研究所, 極端紫外光研究施設, 准教授 (60635803)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Keywordsガンマ線 / トムソン散乱 / コンプトン散乱 / 陽電子消滅 / 超短パルスガンマ線 / 逆トムソン散乱 / 逆コンプトン散乱 / 陽電子 / 寿命運動量相関測定法
Outline of Research at the Start

ガンマ線誘起陽電子消滅寿命測定法は、バルク材料中に存在するナノ欠陥など陽電子捕獲サイトの種類と大きさや濃度を非破壊で分析できる強力なツールである。本研究では、本測定法をガンマ線誘起寿命運動量相関測定法へと進化させ、陽電子捕獲サイトとその周囲の元素同定も同時に行える究極的な測定技術を実現する。ガンマ線を用いることで従来法で顕著であるバックグラウンドを2桁近く小さくでき、試料内cm深部の測定や高温高圧など過酷環境での測定が実現できるという利点がある。研究期間内には、蓄光体の陽イオン空孔分析、金属酸化物の酸素空孔の分析、高温高圧水中のヒドロキシルラジカル分析といった新規研究を推進する。

Outline of Final Research Achievements

In this study, a positron age momentum correlation measurement using ultrashort pulsed gamma-rays (GiAMOC), which was originally developed by the principal investigator at the synchrotron radiation facility UVSOR, was developed. The maximum energy of the ultrashort pulsed gamma-rays is 6.6 MeV and the pulse width is 5 ps. The conventional positron age momentum correlation measurement is a complicated measurement system with analog modules, but in this study, a simple measurement system with a digital oscilloscope was successfully constructed. The measurement of multiple samples clearly showed that the energy spread of annihilation gamma rays changes with time, demonstrating the usefulness of GiAMOC.

Academic Significance and Societal Importance of the Research Achievements

陽電子消滅測定法は、結晶を構成する原子の一部が存在しない単原子空孔型欠陥や高分子中のsub-nm~数nm程度の微小空隙の測定を行える強力な手法である。本研究では、陽電子消滅測定法の一つであるGiAMOCの開発を行った。GiAMOCを用いることで、これまで困難であった厚さ数cmのバルク試料の測定や高温高圧など特殊環境下の試料の測定を行う事ができるようになる。

Report

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

    (19 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (16 results) (of which Int'l Joint Research: 7 results,  Invited: 4 results)

  • [Journal Article] UVSOR-IIIにおけるガンマ線誘起陽電子消滅分光法の開発2023

    • Author(s)
      平義隆
    • Journal Title

      陽電子科学

      Volume: 20 Pages: 3-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of gamma-ray-induced positron age-momentum correlation measurement2022

    • Author(s)
      Taira Yoshitaka、Yamamoto Ryohei、Sugita Kento、Okano Yasuaki、Hirade Tetsuya、Namizaki Shogo、Ogawa Toshio、Adachi Yoshitaka
    • Journal Title

      Review of Scientific Instruments

      Volume: 93 Issue: 11 Pages: 113304-113304

    • DOI

      10.1063/5.0105238

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ガンマ線誘起陽電子消滅分光法の開発2021

    • Author(s)
      Y. Taira, K. Sugita, R. Yamamoto, Y. Okano, M. Fujimoto, T. Hirade
    • Journal Title

      Proceedings of the 18th Annual Meeting of Particle Accelerator Society of Japan

      Volume: - Pages: 138-140

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Presentation] Development of gamma-ray-induced positron annihilation spectroscopy at UVSOR-III2023

    • Author(s)
      Y. Taira, Y. Okano, T. Hirade, A. Yabuuchi
    • Organizer
      16th International Workshop on Slow Positron Beam Techniques & Applications (SloPos-16)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gamma-ray-induced positron annihilation spectroscopy at UVSOR-III BL1U2023

    • Author(s)
      Y. Taira, Y. Okano, T. Hirade
    • Organizer
      The 14th International Particle Accelerator Conference (IPAC’23)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] UVSOR における超短パルスガンマ線を用いた陽電子消滅分光法の開発2023

    • Author(s)
      平義隆
    • Organizer
      京都大学複合原子力科学研究所専門研究会「陽電子科学とその理工学への応用」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] UVSORにおけるガンマ線源開発と利用研究の現状2023

    • Author(s)
      平義隆
    • Organizer
      第30回FELとHigh-Power Radiation研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development of gamma ray induced positron annihilation spectroscopy2022

    • Author(s)
      Y. Taira, K. Sugita, Y. Okano, T. Hirade
    • Organizer
      Conference on Laser and Synchrotron Radiation Combination Experiment 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gamma ray induced positron annihilation spectroscopy at UVSOR-III2022

    • Author(s)
      Y. Taira, K. Sugita, Y. Okano, T. Hirade
    • Organizer
      19th International Conference on Positron Annihilation
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ultra-short pulsed gamma rays and their application to material science2022

    • Author(s)
      Y. Taira, K. Sugita, Y. Okano, T. Hirade
    • Organizer
      Asia-Oceania Conference on Synchrotron Radiation Instrumentation 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] UVSOR-IIIにおけるガンマ線誘起陽電子消滅分光法の開発2022

    • Author(s)
      平義隆、杉田健人、岡野泰彬、平出哲也
    • Organizer
      第59回アイソトープ・放射線研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高エネルギーガンマ線を用いた陽電子消滅分光法2022

    • Author(s)
      平義隆
    • Organizer
      第14回陽電子科学研究交流会
    • Related Report
      2022 Annual Research Report
  • [Presentation] UVSOR-IIIにおけるガンマ線源開発と利用研究2022

    • Author(s)
      平義隆、杉田健人、岡野泰彬、平出哲也、遠藤駿典、全炳俊、静間俊行
    • Organizer
      第19回日本加速器学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Gamma ray-induced positron annihilation spectroscopy using ultra-short pulsed gamma-rays generated by inverse Thomson scattering2022

    • Author(s)
      Y. Taira, R. Yamamoto, Y. Okano, T. Hirade, K. Sugita
    • Organizer
      14th International Conference on Synchrotron Radiation Instrumentation
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Positron annihilation spectroscopy using ultra-short pulsed laser Thomson scattered gamma-rays2021

    • Author(s)
      Y. Taira, M. Fujimoto, Y. Okano, M. Kitaura, T. Hirade
    • Organizer
      3rd International Conference on Nuclear Photonics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ガンマ線誘起陽電子消滅分光法の開発2021

    • Author(s)
      平義隆、杉田健人、山本涼平、岡野泰彬、藤本将輝、平出哲也
    • Organizer
      第18回日本加速器学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] UVSOR-III におけるガンマ線誘起陽電子消滅分光法の開発2021

    • Author(s)
      平義隆、杉田健人、山本涼平、岡野泰彬、平出哲也
    • Organizer
      第64回放射線化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高エネルギー電子ビームを用いた新規ガンマ線源開発と利用研究2021

    • Author(s)
      平義隆
    • Organizer
      電気学会 調査専門委員会 「放射線技術を利用した微量分析およびイメージング技術」
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] ガンマ線誘起陽電子消滅分光法の開発2021

    • Author(s)
      平義隆、杉田健人、山本涼平、岡野泰彬、平出哲也
    • Organizer
      京都大学複合原子力科学研究所専門研究会 「陽電子科学とその理工学への応用」
    • Related Report
      2021 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi