Boron Autoradiography with the Electron Microscope


HERE we report an improvement to an autoradiographic technique1 for determining the spatial distribution in a solid of boron present at parts per million concentrations. The conventional technique is based on recording damage tracks produced by the products of the 10B(n,α)7Li reaction in cellulose acetobutyrate (CAB) and made visible in the optical microscope by etching in hot alkali solution. The technique using optical microscopy has a resolution of 1–2 microns and is sufficiently sensitive to show the distribution of about 0.5 p.p.m. of natural boron.

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  1. 1

    Hughes, J. D. H., and Rogers, G. T., J. Inst. Metals, 95, 200 (1967).

  2. 2

    Hughes, J. D. H. (in the press).

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HUGHES, J., DEWEY, M. & BRIERS, G. Boron Autoradiography with the Electron Microscope. Nature 223, 498–499 (1969).

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