| Project/Area Number |
25400319
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Tokyo Gakugei University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
SATO KIMINORI 東京学芸大学, 教育学部, 准教授 (00401448)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 地質環境 / 物質移行 / オングストローム空間 / ポジトロニウム / マトリックス拡散 |
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| Outline of Final Research Achievements |
In the present work, the matrix diffusion of Cs for saponite layered mineral is studied directly probing angstrom-scale pores by positronium annihilation spectroscopy. The diffusion coefficient of 2×10-7 [cm2s-1] is conventionally evaluated from the distance-dependent data of Cs concentration obtained by atomic absorption spectrometry, which corresponds to the diffusion constant trough open spaces with a wide variety of size. On the contrary, the distance-dependent data of Angstrom-scale open space probed by positronium revealed the matrix diffusion constant of 3×10-8 [cm2s-1], which is one order of magnitude lower than that of conventional diffusion.
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