Systematic measurement and database construction of residual activities induced by low energy charged particle

• Project/Area Number: 17K07010
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Kyoto University
• Principal Investigator: Hiroshi Yashima 京都大学, 複合原子力科学研究所, 助教 (40378972)
• Co-Investigator(Kenkyū-buntansha): 萩原 雅之 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 放射光科学研究センター, 併任 (10450363)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
• Keywords: 誘導放射能 / 放射化断面積

Outline of Final Research Achievements

The decommissioning of old accelerator facilities requires activation cross section data to estimate the residual activities induced in the accelerator components. But experimental data of activation cross section are very scarce for low energy (lower than several tens MeV) heavy ions which were required for decommissioning of accelerator facilities such as tandem accelerator and cyclotron. We therefore irradiated heavy ions onto a Cu target to obtain experimental data of residual radioactivities for low energy heavy ions. The obtained experimental data were compared with evaluated results of database and calculated results of calculation code. The present results will be useful as benchmark data to evaluate nuclear data, investigate the accuracy of calculation codes.

Academic Significance and Societal Importance of the Research Achievements

加速器施設の廃止措置において、発生する廃棄物中の生成放射能量評価が必要となる。最近では、計算で放射化量とその範囲を見積もり、実測値でその妥当性を確認することが求められているが、特に重イオン入射反応については実験データが乏しく断面積データライブラリや計算コードも十分に検証されていない。本研究で得られた重イオン入射反応についての系統的測定結果や断面積データライブラリや計算コードの妥当性確認結果は放射化断面積のデータベースを整備する上で有用であると考える。

Research Products

• [Journal Article] Excitation Function Measurements of Alpha-Induced Reaction on Natural Copper and Titanium Up To 46 MeV (2021)
  • Author(s): Yashima Hiroshi、Hagiwara Masayuki、Sanami Toshiya、Yonai Shunsuke
  • Journal Title: Springer Proceedings in Physics Volume: 254 Pages: 251-253
  • DOI: 10.1007/978-3-030-58082-7_32
  • ISBN: 9783030580810, 9783030580827
  • Peer Reviewed
• [Presentation] Excitation functions for neon-induced reactions on copper up to 180 MeV (2019)
  • Author(s): H. Yashima et al.
  • Organizer: the 2nd International Conference on Radioanalytical and Nuclear Chemistry (RANC 2019).
  • Int'l Joint Research
• [Presentation] Induced activity measurements in Cu target for Ne and C ions (2019)
  • Author(s): H. Yashima et al.
  • Organizer: the 3rd International Conference on Dosimetry and its Applications (ICDA-3)
  • Int'l Joint Research
• [Presentation] MEASUREMENTS OF THE ALPHA-INDUCED ACTIVATION CROSS SECTIONS FOR CU (2018)
  • Author(s): H. Yashima et al.
  • Organizer: 11th Methods and Application of Radioanalytical Chemistry (MARC-XI)
  • Int'l Joint Research
• [Presentation] Excitation function measurements of alpha-induced reaction on natural copper and titanium up to 46 MeV (2018)
  • Author(s): H. Yashima et al.
  • Organizer: 6th International Workshop on Compound-Nuclear Reactions and Related Topic
  • Int'l Joint Research
• [Presentation] 炭素イオン入射による銅ターゲット中の誘導放射能分布の測定 (2018)
  • Author(s): 八島浩他
  • Organizer: 日本原子力学会2018年春の年会