Question: Assuming detector efficiency of (2 %), find the counts recorded by the detector for a gold foil irradiated in a thermal flux of (1.0 times

Assuming detector efficiency of $2 \%$, find the counts recorded by the detector for a gold foil irradiated in a thermal flux of $1.0 \times 10^{9} \mathrm{n} / \mathrm{cm}^{2} / \mathrm{s}$ for $1 \mathrm{~h}$. Assume that the cooling time is $20 \mathrm{~h}$. Flux perturbation factor can be assumed to be unity.

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