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Which outcome occurs when a Cesium-137 source experiences excessive self-shielding?

A)Apparent decay rate decreases
B)Gamma emission spectrum shifts
C)Half-life value is shortened
D)Source material spontaneously heats

💡 Explanation

Gamma rays emitted from the interior of the cesium-137 undergo increased self-absorption via Compton scattering; therefore, apparent decay rate decreases, rather than changes to half-life or overheating, because isotope characteristics are unchanged by flux.

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