Question

Problem 5:   The annual radiation dose from ¹⁴C in our bodies is 0.01 mSv/y. Each ¹⁴C decay emits a β^– averaging 0.0750 MeV.

Taking the fraction of ¹⁴C to be 1.3 × 10^–12 of normal ¹²C, and assuming the body is 13% carbon, estimate the fraction of the decay energy absorbed. (The rest escapes, exposing those close to you.) You can assume the relative biological effectiveness is 1, and recall the half-life of Carbon-14 is 5730 yrs.

Answer 1

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