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Question: 5 10 points a calculate the thickness of shielding material...

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5. (10 points) a) Calculate the thickness of shielding material needed to block out 99.5% of b) What thickness of copper is needed to block out 99.5% of incident radiation c) What thickness of air is needed to block out 99.5% of incident radiation d) What thickness of water is needed to block out 25% of incident radiation incident radiation for a material with a linear attenuation coefficient of μ with an energy of 60 keV? with an energy of 60 keV? with an energy of 40 keV? with an energy of 40 keV? e) What thickness of lead is needed to block out 90% of incident radiation Table of mass attenuation coefficients and densities for selected materials. Mass Attenuation Density Coefficient (cm /a) (a/cm Material air water copper lead 40 keV60 keV 0.2485 0.18750.001225 0.2683 0.2059 4.862 14.36 1.593 5.021 8.96 11.34

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