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Diffusion Measurements on Crystalline Rock Matrix

Published online by Cambridge University Press:  15 February 2011

Kari Hartikainen ,
A. HautojÄrvi ,
H. Pietarila  and
J. Timonen
Kari Hartikainen
Affiliation:
University of Jyväskylä, Department of Physics, P.O.Box 35, FTN–40351 Jyväskylä, Finland;
A. HautojÄrvi
Affiliation:
VTT/Energy, P.O.Box 1604, FIN–02044 VTT, Finland.
H. Pietarila
Affiliation:
University of Jyväskylä, Department of Physics, P.O.Box 35, FTN–40351 Jyväskylä, Finland;
J. Timonen
Affiliation:
University of Jyväskylä, Department of Physics, P.O.Box 35, FTN–40351 Jyväskylä, Finland;
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Abstract

A new gas flow technique is introduced such that experiments on very long samples are possible. This new technique together with increased accuracy of the measurements, allows the observation of power law tails in the break-through curves. Dispersion in these experiments can be controlled in great detail, and therefore the power law tails can be used to determine very accurately the parameters relevant in matrix diffusion. Results for rock and metal samples are shown, and they are fitted with model calculations which include both dispersion and matrix diffusion. The introduced technique, which is designed for ordinary drill cores, is suitable for scanning a large number of samples in a very short time.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 435
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. Väätäinen, K., Timonen, J. and Hautojärvi, A., pp. 851–856 in Scientific Basis for Nuclear Waste Management XVI, edited by Interrante, C.G. and Pabalan, R.T. (Materials Research Society, Vol. 294, Pittsburgh, 1993).Google Scholar
2. Hartikainen, K., Väätäinen, K., Hautojärvi, A. and Timonen, J., pp. 821–826 in Scientific Basis for Nuclear Waste Management XVII, edited by Barkatt, A. and Van Konynenburg, R.A. (Materials Research Society, Vol. 333, Pittsburgh, 1994).Google Scholar
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