Abstract

The differential energy albedo has been measured for five different shield materials (aluminium, concrete, iron, tin and lead) for 1250 keV photons obtained from radioactive 60Co, at angular steps of 10°, using a proportional response photon counter. The total energy albedo has been calculated from the measured differential energy albedo by numerical integration. We find that the application of such a counter not only eliminates tedious efficiency corrections needed in conventional counting systems, but also improves the accuracy of the measurements.

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