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Which 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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