Developement of high-melting-point organic crystals for neutron scintillators

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K14135
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 30010:Crystal engineering-related
• Research Institution: Tohoku University
• Principal Investigator: Yamaji Akihiro 東北大学, 金属材料研究所, 助教 (20779722)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 有機結晶 / 結晶成長 / シンチレータ / 中性子検出

Outline of Final Research Achievements

Organic crystals have been grown and developed for neutron scintillator. In this study, we have grown organic crystals with crystal structure of benzene rings and evaluated their scintillation properties. We have developed organic crystals for neutron scintillators with high melting temperatures higher than 200°C and fast decay times.Large size crystals with a diameter of up to 2inch for detector applications have been grown and neutron imaging test was performed by using the grown crystlas.

Free Research Field

結晶工学

Academic Significance and Societal Importance of the Research Achievements

中性子で発光するシンチレータとして有機物結晶の育成を行い、系統的に探索することで、有機物結晶の結晶構造と発光特性の関連性を明らかにする。これにより、材料設計の指針が構築できると予想されている。有望な材料が見つかれば、セキュリティ（爆発物検査等）や資源探査、高エネルギー物理など幅広い分野への寄与が期待できる。