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    Activity and activation cross section.

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    A cobalt foil, 1 cm diameter x 0.1 mm thick, is irradiated in a mean thermal flux of
    10^11 n/cm^2-s for a period of 7 days. If the activation cross section is 36 barns and if the density of cobalt is 8.9 g/cm^3, what is the activity (Bq) at the end of the
    irradiation period?

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    Solution Summary

    The activation cross section in barns for Cobalt and the thermal flux is given and the activity is calculated.