A 60Co source with activity 2.6 * 10-4 Ci is embedded in a
Chapter 43, Problem 43.63(choose chapter or problem)
A 60Co source with activity 2.6 * 10-4 Ci is embedded in a tumor that has mass 0.200 kg. The source emits g photons with average energy 1.25 MeV. Half the photons are absorbed in the tumor, and half escape. (a) What energy is delivered to the tumor per second? (b) What absorbed dose (in rad) is delivered per second? (c) What equivalent dose (in rem) is delivered per second if the RBE for these g rays is 0.70? (d) What exposure time is required for an equivalent dose of 200 rem?
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