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← ScienceIn Positron Emission Tomography (PET), which outcome arises when fluorine-18 isotopes decay?
A)Annihilation produces detectable gamma photons✓
B)Fluorine converts to stable oxygen-16
C)Electron capture forms metastable cobalt-57
D)Internal conversion emits characteristic X-rays
💡 Explanation
Positron emission causes the annihilation of the positron with an electron, therefore producing two gamma photons detected by the PET scanner, rather than decaying into oxygen or cobalt isotopes because those require different decay pathways.
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