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Which consequence results during long-term radioactive source encapsulation failure?

A)Daughter isotope half-life dominance increases
B)Shielding material becomes neutron transparent
C)Decay heat capacity asymptotically increases
D)Gamma emission band becomes narrower

💡 Explanation

Following encapsulation failure, the rate of daughter product accumulation increases; therefore, the relative proportion of the radioactive daughter relative to parent isotopes increases due to beta-minus decay, which results in a decay shift, rather than altered physics.

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