Using the direct correlation between peak area counts and neutron beamintensity, we irradiated cadmium foils of fixed mass on the marked positions on thesample holder. For consistency, we also recorded the peak area counts for H and Bpeaks. These counts are from neutron capture by shielding materials and substantialvariations should not be expected. Since H and B are from the shielding materials, theconstancy in counts per seconds in between irradiations is expected. The changes incounts at the Cd peak energy of 558 keV correlates with changes in neutron fluence rateas a function of position. The dram vial used for this investigation is shown in Fig. 3-10.
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