Spectrum isotopes library

Rn-222

Radon-222
Natural
α, β radiation

Half-life: 3,8 days

Main emission lines: —

Decay chain: Ra-226

Related lines:  47keV, 78keV, 242keV, 295keV, 351keV, 609keV, 1120keV, 1760keV, 2200keV

Where detected

Decay product of uranium thorium or radium. Always present with gamma-emitting decay products. The spectrum is almost identical to that of Radium-226 or natural uranium.

Radium-226

Radium-226 can be found in the form of paint based on it: tumblers, clocks, military hand instruments until the 60s. Such paint often crumbles and is dangerous if ingested. Radium, a byproduct of uranium decay, itself decays into radon-222, a dangerous gas for humans. More than half of a person's lifetime radiation dose comes from radon.

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