2013 Fiscal Year Final Research Report
NMR study of aging process of self-radiation damage in minor actinide dioxides
| Project/Area Number |
23686137
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear engineering
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
TOKUNAGA Yo 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 先端基礎研究センター, 研究主幹 (00354902)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | マイナーアクチニド酸化物 / 核磁気共鳴 / 自己照射損傷 / 磁気相転移 |
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| Research Abstract |
Aging process of self-radiation damage in minor actinide dioxides has been investigated microscopically by means of 17O NMR. In 243AmO2, we have observed a rapid change of the NMR line shape over the short time interval of one month. The result demonstrates that the self-radiation damage rapidly increases the numbers of defect at low temperatures, and further, that the electronic ground state of the system is highly sensitive to the disorder. The NMR data have also revealed short-range, spin-glass-like character for the magnetic transition in this system.
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