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← ScienceWhich outcome occurs when a Cesium-137 source nears depletion?
A)Gamma emission rate declines steadily✓
B)Half-life of Cesium shortens drastically
C)Beta decay path becomes dominant
D)Neutron flux increases proportionally
💡 Explanation
Gamma emission rate decreases because radioactive decay follows first-order kinetics; therefore fewer Cesium-137 atoms remain to undergo beta decay followed by gamma emission, rather than changes to inherent decay parameters or emission pathways.
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