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32.3 Exercise 8

Avg difficulty 2.5

Naturally occurring 40K^{\text{40}} \text{K} is listed as responsible for 16 mrem/y of background radiation. Calculate the mass of 40K^{\text{40}} \text{K} that must be inside the 55-kg body of a woman to produce this dose. Each 40K^{\text{40}} \text{K} decay emits a 1.32-MeV β\beta, and 50% of the energy is absorbed inside the body.

OpenStax College Physics 2e, 32.3 Therapeutic Uses of Ionizing Radiation, exercise 8

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.