Study of nuclear reaction data in particle beam therapy

2019 Fiscal Year Final Research Report

• Project/Area Number: 15K19822
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Radiation science
• Research Institution: Meiji University (2018-2019); Rikkyo University (2015-2017)
• Principal Investigator: Horaguchi Takuma 明治大学, 商学部, 特任准教授 (10444069)
• Project Period (FY): 2015-04-01 – 2020-03-31
• Keywords: 放射線 / 原子核 / 反応断面積 / 粒子線治療 / モンテカルロシミュレーション

Outline of Final Research Achievements

Evaluate the effect of the accuracy of nuclear reaction data on On-Line PET, which is a method for extracting the irradiation field using positron-emitting nuclides generated during proton beam therapy, and the dose calculation of normal cells by secondary neutrons in particle beam therapy. We confirmed the importance of accuracy of nuclear reaction data. Furthermore, we advanced the development of a detector for nuclear reaction data measurement. From the initial plan, we improved the multi-channel readout method using multiple MPPCs with the aim of downsizing the entire detector including the power supply and readout circuit and generalizing the detector itself. The situation around the research subject has changed from the beginning of the research, and we plan to continue development as a versatile detector.

Free Research Field

放射線科学

Academic Significance and Societal Importance of the Research Achievements

粒子線治療における原子核反応データの整備が十分でないことを指摘し、現状の原子核反応データの測定精度が、粒子線治療における二次中性子による正常細胞への被ばく量評価及び陽子線治療における放射性核種を利用した照射野抽出精度に少なからず影響を与えることを確認した。更に、不足する原子核反応データを測定するための検出器開発を進めた。