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Back to 32.2 Biological Effects of Ionizing Radiation

32.2 Exercise 14

Avg difficulty 2.5

One half the γ\gamma rays from 99mTc^{\text{99m}} \text{Tc} are absorbed by a 0.170-mm-thick lead shielding. Half of the γ\gamma rays that pass through the first layer of lead are absorbed in a second layer of equal thickness. What thickness of lead will absorb all but one in 1000 of these γ\gamma rays?

OpenStax College Physics 2e, 32.2 Biological Effects of Ionizing Radiation, exercise 14

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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.