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← ScienceWhich risk is increased when americium-241 inside smoke detectors accumulates alpha decay products?
A)Compromised sensor calibration✓
B)Reduced alpha particle penetration
C)Elevated detector temperature
D)Increased ionization chamber resistance
💡 Explanation
Alpha decay forms helium, which can deposit on the sensor, creating dielectric layers. Because this alters the electric field distribution, the sensor loses calibration, therefore, requiring more frequent sensitivity adjustments, rather than enhanced particle penetration as in other decay modes.
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