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Determination of traces of phosphorus in gallium arsenide by radiochemical neutron activation analysis

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Abstract

A radiochemical separation procedure has been developed to determine traces of phosphorus in gallium arsenide. In this procedure the indicator nuclide32P is separated from all other long-lived activation products in high purity. The resulting eluate is sufficiently pure to allow β-counting. Because of the high β-energy of32P (1710 keV) the activity can be measured via the Cerenkov effect, whereas most radionuclides, because they have essentially lower β-energies, are discriminated by this technique, so that the selectivity of the measurement of32P is improved considerably. A detection limit of 1 ng/g was achieved when using samples of 50 mg, a thermal neutron flux of ϕth=1·1013n·cm−2·s−1, an irradiation time of 36 hours and a measuring time of 1 hour.

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Authors and Affiliations

  1. Central Division of Chemical Analysis (ZCH), Research Center Jülich Gmbh (KFA), P.O. Box 1913, D-5170, Jülich, (Germany)

    G. Küppers & G. Erdtmann

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  1. G. Küppers
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  2. G. Erdtmann
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Küppers, G., Erdtmann, G. Determination of traces of phosphorus in gallium arsenide by radiochemical neutron activation analysis. Journal of Radioanalytical and Nuclear Chemistry, Articles 168, 457–464 (1993). https://doi.org/10.1007/BF02040526

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  • DOI: https://doi.org/10.1007/BF02040526

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