A 70-kg worker is accidentally exposed for 2.0 minutes to a 21-mCi source of beta radiation from a sample of strontium-90. (a) What is the activity of the radiation source in cps? (b) Suppose that each beta particle has an energy of 0.547 MeV (1 MeV = 1.609 x 10-13 J) and 45% of the radiation is absorbed. Assuming that the absorbed radiation is spread over the person’s entire body, calculate the absorbed dose in rads and in grays. (c) If the beta particles has an RBE of 1.0, what is the effective absorbed dose in mrem and in sieverts?

A 70-kg worker is accidentally exposed for 2.0 minutes to a 21-mCi source of beta radiation from a sample of strontium-90. (a) What is the activity of the radiation source in cps? (b) Suppose that each beta particle has an energy of 0.547 MeV (1 MeV = 1.609 x 10-13 J) and 45% of the radiation is absorbed. Assuming that the absorbed radiation is spread over the person’s entire body, calculate the absorbed dose in rads and in grays. (c) If the beta particles has an RBE of 1.0, what is the effective absorbed dose in mrem and in sieverts?