Physics · May / June 2017 · Paper 21 · Question 8
5054
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The question as text
A doctor has the choice of two isotopes, 131 53I and 125 53I, to inject into a patient. These isotopes emit radiation from deep inside the body. The radiation is detected outside the body and provides information to help the doctor find out what is wrong with the patient. The isotope 131 53I decays into a stable isotope of xenon by emitting a beta-particle (β) and a gamma ray (γ).
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8(a)[1]
8(b)[2]
8(c)[2]
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