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← ScienceWhich outcome results when electron-positron annihilation occurs near a massive nucleus?
A)Kinetic energy remains minimal overall.
B)Gamma rays exhibit Doppler shifting.
C)Pair production efficiency increases sharply.✓
D)Beta decay becomes significantly suppressed.
💡 Explanation
Pair production creates new particles because the gamma ray energy near the nucleus converts into mass via pair production. Therefore, pair production becomes more efficient rather than Doppler shifting, because that requires an increase in kinetic energies.
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