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← ScienceWhich 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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