2015 Fiscal Year Final Research Report
Study of matrix diffusion in geological environment
| 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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| 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 |
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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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| Free Research Field |
岩石鉱物学
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