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← ScienceWhich outcome results when isotope concentration decays in scintillator?
A)Decreased excitation photon production efficacy✓
B)Increased Cherenkov radiation dominance
C)Elevated detector background noise floor
D)Reduced photomultiplier tube electron avalanche
💡 Explanation
Excitation photon production decreases during isotopic decay because there are fewer radioactive atoms available to interact and excite, thus reducing scintillation efficiency. Therefore, photon production declines and efficacy will reduce, rather than options relating to background events which may instead increase slowly.
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