Microscopic studies on the demagnetization effect on permanent magnets induced by radiations from accelerators

• Project/Area Number: 19540291
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyoto University
• Principal Investigator: TANIGAKI Minoru Kyoto University, 原子炉実験所, 助教 (90314294)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 加速器放射線 / 放射線損傷 / 減磁 / 超微細相互作用 / 希土類磁性体 / 核磁気モーメント

Research Abstract

To investigate the mechanism on the demagnetization of permanent magnets caused by radiations (mainly neutrons) from accelerators, the degrees of demagnetization were measured for neutrons of various energies produced by a nuclear reactor and accelerators. The microscopic studies on the changes of electromagnetic structures inside the magnet caused by radiations are also performed by using radioactive nuclei as probes. Additionally, developments on the unstable nuclei as probes and the techniques on radioactive beam are performed.

Research Products

• [Journal Article] Half-Life and Magnetic Moment of the First Excited State in 132I (2009)
  • Author(s): M. Tanigaki, S. Izumi, H. Ouchi, A. Sasaki, Y. Miyashita, N. Sato, S. Hoshino, K. Shimada, T. Wakui, T. Shinozuka, Y. Ohkubo
  • Journal Title: Phys. Rev. C 80 Pages: 34304-34304
• [Journal Article] Half-Life and magnetic moment of the first excited state in ^<132>I (2009)
  • Author(s): M.Tanigaki, S.Izumi, H.Ouchi, et al.
  • Journal Title: Physical Review C 80 Pages: 0343041-6
  • Peer Reviewed
• [Journal Article] Observation of Local Fields at 111Cd (←111In)Sites in Aluminum-Doped ZnO (2008)
  • Author(s): W. Sato, Y. Komeno, M. Tanigaki, A. Taniguchi, S. Kawata, Y.
  • Journal Title: J. Phys. Soc. Jpn. 77
  • NAID: 130005436143
  • Peer Reviewed
• [Journal Article] Magnetic properties of rare-earth permanent magnets under a high radiation environment (2008)
  • Author(s): M. Tanigaki
  • Journal Title: Hyperfine Interactions H20年2月掲載決定受理
  • Peer Reviewed
• [Journal Article] Magnetic Properties of Rare-Earth Permanent Magnets under a High Radiation Environmen (2007)
  • Author(s): M. Tanigaki, K. Takamiya, Y. Komeno, A. Taniguchi, Y. Ohkubo
  • Journal Title: 176 Pages: 125-128
• [Presentation] Current Status of KURRI (2010)
  • Author(s): M. Tanigaki
  • Organizer: International Workshop on "Physics with Stopped and Slow Radioisotope Beams (SSRI)"
  • Place of Presentation: 東京工業大学
  • Year and Date: 2010-03-01
• [Presentation] Half-Life and magnetic moment of the first excited state in 132I (2009)
  • Author(s): S. Izumi, M. Tanigaki, H. Ouchi, A. Sasaki, Y. Miyashita, N. Sato, S. Hoshino, K. Shimada, T. Wakui, T. Shinozuka, Y. Ohkubo
  • Organizer: 第3回日米物理学会合同核物理分科会
  • Place of Presentation: アメリカ・ハワイ州・ワイコロア
  • Year and Date: 2009-10-15
• [Presentation] Half-Life and magnetic moment of the first excited state in ^<132>I (2009)
  • Author(s): S.Izumi
  • Organizer: 第3回日米物理学会合同核物理分科会
  • Place of Presentation: Waikoloa, Hawaii, USA
  • Year and Date: 2009-10-15
• [Presentation] TDPACによる物性研究とプローブ核の開発 (2008)
  • Author(s): 谷垣実
  • Organizer: 第5回 停止・低速不安定核ビームを用いた核分光研究会
  • Place of Presentation: 大阪大学
• [Presentation] 摂動角相関法による核モーメント測定 (2008)
  • Author(s): 谷垣実
  • Organizer: RCNP 研究会「RCNPにおける不安定核の研究〜RCNPビームラインの可能性を探る〜」
  • Place of Presentation: 大阪大学
• [Presentation] Magnetic properties of rare-earth permanent magnets under a high radiation environment (2007)
  • Author(s): M. Tanigaki
  • Organizer: HFI+NQI 2007
  • Place of Presentation: Foz do Iguacu, Brazil
  • Year and Date: 2007-08-09
• [Remarks] 京都大学学術情報レポジトリ
  • URL: http://repository.kulib.kyoto-u.ac.jp/d