longer than one hour (including those that are stable), given in list of nuclides. List of commercially available radionuclides This list covers common isotopes, most of which are available in very small quantities to the general public in most countries. Others that are not publicly accessible are traded commercially in industrial, medical, and scientific fields and are subject to government regulation. Gamma emission only Beta emission only Alpha emission only Multiple radiation emitters See also List of nuclides shows all radionuclides with half-life > 1 hour Hyperaccumulators table – 3 Radioactivity in biology Radiometric dating Radionuclide cisternogram Uses of radioactivity in oil and gas wells Notes References Further reading External links EPA – Radionuclides – EPA's Radiation Protection Program: Information. FDA – Radionuclides – FDA's Radiation Protection Program: Information. Interactive Chart of Nuclides – A chart of all nuclides National Isotope Development Center – U.S. Government source of radionuclides – production, research, development, distribution, and information The Live Chart of Nuclides – IAEA Radionuclides production simulator – IAEA Radioactivity Isotopes Nuclear physics Nuclear chemistry