Gamma ray
OverviewSourcesHistory of discoveryPropertiesApplicationsHealth effectsUnits of measurement and exposureDistinction from X-rays
Natural sources of gamma rays on Earth include gamma decay from naturally occurring radioisotopes such as potassium-40, and also as a secondary radiation from various atmospheric interactions with cosmic ray particles. Natural terrestrial sources that produce gamma rays include lightning strikes and terrestrial gamma-ray flashes, which produce high energy emissions from natural high-energy voltages. Gamma ra
