Physics · May / June 2023 · Paper 12 · Question 22
5054Half-life
Which radioactive isotope can be used for measuring cracks or flaws in metal components?
- Aamericium-241, an alpha emitter with a half-life of 432 years
- Bcobalt-60, a gamma emitter with a half-life of 5 years
- Cradium-223, an alpha emitter with a half-life of 11 days
- Dbarium-137, a gamma emitter with a half-life of 3 minutes
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Correct answer: B. cobalt-60, a gamma emitter with a half-life of 5 years
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