Definition of alpha track
: designed to measure and record radon levels by creating a graphic record of the alpha particles that are emitted as radon undergoes radioactive decay
alpha track detectors Detection of radon in the home can be accomplished with charcoal canisters, ion detectors, and alpha track monitors available from most health departments or extension agents …— Kathryn Hilgenkamp, Environmental Health: Ecological Perspectives, 2005
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Merriam-Webster unabridged
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Time Traveler for alpha track
The first known use of alpha track was circa 1949
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