Calculation for gamma ray buildup factor for aluminium, graphite and lead

摘要

The purpose of this work was to investigate and quantify the linear attenuation coefficient and the buildup factor for different materials. The linear attenuation coefficient of absorber materials such as graphite was (0.097 cm~(‒1)), whereas it was observed (0.136 cm~(‒1)) for aluminium, and lead was (0.596 cm~(‒1)). By using the gamma radiation energies emitted from~(60)Co source with 1332 keV, experimental and theoretical values are in a good agreement. Attenuation coefficient was measured by using counts of good geometry and bad geometry. The result shows that the linear attenuation is higher for lead and better radiation shielding compared with graphite and aluminium. Furthermore, buildup factor decreases with increasing thickness of the absorber material.