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O-LevelPhysicsNuclear Physics5054/12 · Oct/Nov 2019 · Q391 Mark

Radioactive substances are used as tracers in medical examinations. A liquid tracer is injected into a patient. A detector 20 cm above the patient shows where the radioactive substance is in the body. What is the best radioactive substance to use?

Aan alpha-particle emitter with a half-life of a few hours
Ban alpha-particle emitter with a half-life of a few years
Cgamma ray emitter with a half-life of a few hours
Dgamma ray emitter with a half-life of a few years

✓ Correct answer

C: gamma ray emitter with a half-life of a few hours

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About this question

Topic
Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, Oct/Nov 2019 Paper 1 Variant 2, question 39.

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