Most Important Radionuclide: Radon-222
Source: Decay product of radium-226 in the decay series of uranium-238
Half-Life: 3.8 days
Specific Activity: 160,000 Ci/gm
Decay Mode: Alpha
Critical Organ: Lung
Internal Toxicity: High
Annual Limit on Intake: 0.1 mCi
Radiation Energy (MeV): Alpha 5.49 (100%) + daughters;
See "Estimating the burden of lung cancer in Canada attributed to occupational radon exposure using a novel exposure assessment method." [
PMID 32232555]
[See Glossary for references.] See "Radiation, ionizing."