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Effect of Noncollimated Radiation on Surface Activity Methods for the Determination of Diffusion Coefficients in Solids

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Abstract

The contributions of radiations arriving at a diffusion specimen surface, including angles other than 90°, have been evaluated for a number of counting geometries. Modifications are proposed for the Steigman, Shockley, and Nix equation for the surface activity method, the Gruzin equation for the residual activity method, and the Gatos and Kurtz equation for autoradiography on an oblique section through the diffusion zone. The theoretical equations for absorption of a divergent beam from a plane source as detected at a point counter have been shown to agree with experimental results for extended counters under not very restricted conditions. MnKα radiation from Fe55 was used to obtain a monochromatic source of X-rays.

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References

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Author information

Authors and Affiliations

  1. James Forrestal Research Center, Princeton University, USA

    R. H. Condit (Assistant in Research)

  2. Princeton University, Princeton, N. J, USA

    C. E. Birchenall (Member AIME, Associate Professor of Chemistry)

Authors
  1. R. H. Condit
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  2. C. E. Birchenall
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Additional information

R. H. CONDIT, formerly Graduate Student Princeton University

TP 4301E. Manuscript, June 14, 1955. Cleveland Meeting, October 1956.

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Condit, R.H., Birchenall, C.E. Effect of Noncollimated Radiation on Surface Activity Methods for the Determination of Diffusion Coefficients in Solids. JOM 8, 1341–1344 (1956). https://doi.org/10.1007/BF03377880

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  • DOI: https://doi.org/10.1007/BF03377880

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