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2022 Fiscal Year Final Research Report

Study on Production of Low Toxicity Boron Preparation for Neutron Capture Therapy

Research Project

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Project/Area Number 20K03922
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 14030:Applied plasma science-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Sakakita Hajime  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究部門付 (90357088)

Co-Investigator(Kenkyū-buntansha) 板垣 宏知  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究員 (00793184)
清水 鉄司  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究グループ長 (70803881)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsレーザーアブレーション / プラズマ / 内包フラーレン / ボロン / X線吸収微細構造計測 / 超伝導検出器
Outline of Final Research Achievements

X-ray absorption fine structure measurements were performed at the High Energy Accelerator Research Organization to develop a method for the measurement of boron endohedral fullerenes (B@C60). Electron yield and fluorescence yield measurements were performed at beamline PF-BL-7A to measure the energy spectra. As a result, a signal around 194.8 eV which expects to be boron in the sample, was measured. Furthermore, measurements were made at beamline PF-BL-11A using a superconducting detector, and nitrogen signal was obtained by the X-ray fluorescence measurement. The absorption spectrum measurement of boron by the fluorescence yield method showed a peak around 192 eV. Although the possibility of an evaluation method for B@C60 was found, a comparative study of the energy spectral shape with numerical analysis is considered important to identify B@C60.

Free Research Field

プラズマ理工学

Academic Significance and Societal Importance of the Research Achievements

約100 eVのエネルギーを持つ粒子を多く生成するレーザーアブレーション条件の探索、及びX線吸収微細構造計測を用いたB@C60の計測法の開拓などの学術的意義がある。中性子捕捉療法用ボロン製剤のボロンの特質に由来する毒性が課題となっている。これに対して、生体親和性の良い炭素フラーレンにボロン原子を内包化させることで毒性を低減する手法が開発されることで、低毒性な製剤生成につながるという社会的意義がある。

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Published: 2024-01-30   Modified: 2025-01-30  

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