Synthesis of organic-inorganic hybrid materials for radiation detection based on the control of higher order structure

2021 Fiscal Year Final Research Report

• Project/Area Number: 18H03890
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 31:Nuclear engineering, earth resources engineering, energy engineering, and related fields
• Research Institution: Tohoku University
• Principal Investigator: Koshimizu Masanori 東北大学, 工学研究科, 准教授 (40374962)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Keywords: シンチレータ / 線量計 / ラジオクロミズム / 有機無機ハイブリッド / 放射光

Outline of Final Research Achievements

We developed phosphors based on organic-inorganic hybrid materials to be applied to radiation detection. We focused on materials design from a viewpoint of higher order structure to optimize the energy transfer efficiency or secondary electron transportation as well as the surroundings of optically active sites. We have developed novel scintillators for real-time radiation detection and thermally stimulated luminescence materials for dosimetry. In particular, organic-inorganic hybrid scintillators developed in this study exhibited excellent properties, which exceeded those of commercially available materials.

Free Research Field

放射線工学

Academic Significance and Societal Importance of the Research Achievements

有機無機ハイブリッド材料に基づく蛍光体について、放射線計測に応用すべく、材料開発を進めた。特に、光学的に活性なサイトの周囲のみでなく、長距離でのエネルギー移動過程や二次電子の輸送過程などを考慮し、高次構造を設計した上で材料開発を進めた。リアルタイム放射線計測に用いられるシンチレータや、線量計測に用いられる熱蛍光体の開発を進めた。特にシンチレータ開発では、高エネルギー光子検出に用いられる市販品を顕著に凌駕する性能を達成した。