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Science 8 July 1977:
Vol. 197. no. 4299, pp. 157 - 159
DOI: 10.1126/science.197.4299.157
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Articles

Transmutation Products May Influence Radiotracer Diffusion Rates in an Ionic Solid

G. C. T. WEI 1 and B. J. WUENSCH 1

1 Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge 02139

An inherent aspect of radiotracer diffusion is that agr, beta+, or beta– emission produces a daughter element of different ionization state. This process must either cause a change in the vacancy concentrations or create space charge, depending on the effectiveness of the internal sources or sinks. Four coupled equations established to model the kinetics, when solved by numerical methods, predict that the apparent tracer diffusion rate may easily be in error by a factor of 2 or 3 and, under certain conditions, by as much as an order of magnitude.

Submitted on October 5, 1976
Revised on February 4, 1977


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Comparison of Radioactive and Stable Tl+ Diffusion in Potassium Chloride: Demonstration of a Transmutation Effect.
G. C. T. WEI and B. J. WUENSCH (1977)
Science 197, 159-161
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