2009 Fiscal Year Final Research Report

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

Research Project

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
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
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.