O-LevelPhysicsNuclear Physics5054/12 · May/June 2023 · Q221 Mark
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
✓ Correct answer
B: cobalt-60, a gamma emitter with a half-life of 5 years
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