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- Radionuclide abstract "A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable. This excess energy can either create and emit from the nucleus new radiation (gamma radiation), or a new particle (alpha particle or beta particle); or transfer this excess energy to one of its electrons, causing it to be ejected (conversion electron). During this process, the radionuclide is said to undergo radioactive decay. These emissions constitute ionizing radiation. The unstable nucleus is more stable following the emission, but sometimes will undergo further decay. Radioactive decay is a random process at the level of single atoms: it is impossible to predict when one particular atom will decay. However, for a collection of atoms of a single element the decay rate, and thus the half-life (t1/2) for that collection can be calculated from their measured decay constants. The duration of the half-lives of radioactive atoms have no known limits; the time range is over 55 orders of magnitude. Radionuclides both occur naturally and are artificially made using nuclear reactors, cyclotrons, particle accelerators or radionuclide generators. There are about 650 radionuclides with half-lives longer than 60 minutes (see list of nuclides). Of these, 34 are primordial radionuclides that existed before the creation of the solar system, and there are another 50 radionuclides detectable in nature as daughters of these, or produced naturally on Earth by cosmic radiation. More than 2400 radionuclides have half-lives less than 60 minutes. Most of these are only produced artificially, and have very short half-lives. For comparison, there are about 254 stable nuclides.All chemical elements have radionuclides. Even the lightest element, hydrogen, has a well-known radionuclide, tritium. Elements heavier than lead, and the elements technetium and promethium, exist only as radionuclides.Radionuclides can have both beneficial and harmful effects on living organisms. Radionuclides with suitable half-lives are used in nuclear medicine for both diagnosis and treatment. An imaging tracer made with radionuclides is called a radioactive tracer. A pharmaceutical drug made with radionuclides is called a radiopharmaceutical.".
- Radionuclide wikiPageExternalLink inf56.html.
- Radionuclide wikiPageExternalLink chart.
- Radionuclide wikiPageExternalLink isotopes.gov.
- Radionuclide wikiPageExternalLink livechart.
- Radionuclide wikiPageExternalLink index.html.
- Radionuclide wikiPageExternalLink level98.
- Radionuclide wikiPageID "37245".
- Radionuclide wikiPageLength "22632".
- Radionuclide wikiPageOutDegree "154".
- Radionuclide wikiPageRevisionID "678299324".
- Radionuclide wikiPageWikiLink Acute_radiation_syndrome.
- Radionuclide wikiPageWikiLink Alpha_particle.
- Radionuclide wikiPageWikiLink Americium-241.
- Radionuclide wikiPageWikiLink Americium_dioxide.
- Radionuclide wikiPageWikiLink Amino_acid.
- Radionuclide wikiPageWikiLink Archaeology.
- Radionuclide wikiPageWikiLink Atom.
- Radionuclide wikiPageWikiLink Barium-133.
- Radionuclide wikiPageWikiLink Beta_decay.
- Radionuclide wikiPageWikiLink Beta_particle.
- Radionuclide wikiPageWikiLink Biochemistry.
- Radionuclide wikiPageWikiLink Biology.
- Radionuclide wikiPageWikiLink Bismuth.
- Radionuclide wikiPageWikiLink Cadmium-109.
- Radionuclide wikiPageWikiLink Caesium-137.
- Radionuclide wikiPageWikiLink Calcium.
- Radionuclide wikiPageWikiLink Carbon.
- Radionuclide wikiPageWikiLink Carbon-14.
- Radionuclide wikiPageWikiLink Carbon_dioxide.
- Radionuclide wikiPageWikiLink Category:Isotopes.
- Radionuclide wikiPageWikiLink Category:Nuclear_chemistry.
- Radionuclide wikiPageWikiLink Category:Nuclear_physics.
- Radionuclide wikiPageWikiLink Category:Radioactivity.
- Radionuclide wikiPageWikiLink Chemical_element.
- Radionuclide wikiPageWikiLink Cherenkov_luminescence_imaging.
- Radionuclide wikiPageWikiLink Cobalt-57.
- Radionuclide wikiPageWikiLink Cobalt-60.
- Radionuclide wikiPageWikiLink Conversion_electron.
- Radionuclide wikiPageWikiLink Cosmic_ray.
- Radionuclide wikiPageWikiLink Cosmic_rays.
- Radionuclide wikiPageWikiLink Cosmogenic.
- Radionuclide wikiPageWikiLink Cyclotron.
- Radionuclide wikiPageWikiLink DNA_replication.
- Radionuclide wikiPageWikiLink Decay_constant.
- Radionuclide wikiPageWikiLink Ecology.
- Radionuclide wikiPageWikiLink Electron.
- Radionuclide wikiPageWikiLink Electronvolt.
- Radionuclide wikiPageWikiLink Environmental_radioactivity.
- Radionuclide wikiPageWikiLink Europium.
- Radionuclide wikiPageWikiLink Europium-152.
- Radionuclide wikiPageWikiLink Exponential_decay.
- Radionuclide wikiPageWikiLink Fluorine-18.
- Radionuclide wikiPageWikiLink Food_preservation.
- Radionuclide wikiPageWikiLink Gadolinium-153.
- Radionuclide wikiPageWikiLink Gamma_radiation.
- Radionuclide wikiPageWikiLink Gamma_ray.
- Radionuclide wikiPageWikiLink Geiger_counter.
- Radionuclide wikiPageWikiLink Genetics.
- Radionuclide wikiPageWikiLink Geology.
- Radionuclide wikiPageWikiLink Haematopoiesis.
- Radionuclide wikiPageWikiLink Half-life.
- Radionuclide wikiPageWikiLink Half-live.
- Radionuclide wikiPageWikiLink Hemopoietic.
- Radionuclide wikiPageWikiLink Hydrogen.
- Radionuclide wikiPageWikiLink Hyperaccumulators_table_–_3.
- Radionuclide wikiPageWikiLink Industry.
- Radionuclide wikiPageWikiLink Internal_conversion.
- Radionuclide wikiPageWikiLink Ion.
- Radionuclide wikiPageWikiLink Ionization_chamber.
- Radionuclide wikiPageWikiLink Ionizing_radiation.
- Radionuclide wikiPageWikiLink Iridium-192.
- Radionuclide wikiPageWikiLink Isotope_lists.
- Radionuclide wikiPageWikiLink Isotope_separation.
- Radionuclide wikiPageWikiLink Isotopes_of_americium.
- Radionuclide wikiPageWikiLink Isotopes_of_barium.
- Radionuclide wikiPageWikiLink Isotopes_of_cadmium.
- Radionuclide wikiPageWikiLink Isotopes_of_cobalt.
- Radionuclide wikiPageWikiLink Isotopes_of_europium.
- Radionuclide wikiPageWikiLink Isotopes_of_gadolinium.
- Radionuclide wikiPageWikiLink Isotopes_of_iridium.
- Radionuclide wikiPageWikiLink Isotopes_of_manganese.
- Radionuclide wikiPageWikiLink Isotopes_of_molybdenum.
- Radionuclide wikiPageWikiLink Isotopes_of_neptunium.
- Radionuclide wikiPageWikiLink Isotopes_of_niobium.
- Radionuclide wikiPageWikiLink Isotopes_of_polonium.
- Radionuclide wikiPageWikiLink Isotopes_of_rubidium.
- Radionuclide wikiPageWikiLink Isotopes_of_sodium.
- Radionuclide wikiPageWikiLink Isotopes_of_thallium.
- Radionuclide wikiPageWikiLink Isotopes_of_zinc.
- Radionuclide wikiPageWikiLink Lead.
- Radionuclide wikiPageWikiLink List_of_nuclides.
- Radionuclide wikiPageWikiLink Manganese-54.
- Radionuclide wikiPageWikiLink Mining.
- Radionuclide wikiPageWikiLink Molybdenum-99.
- Radionuclide wikiPageWikiLink Neptunium-237.
- Radionuclide wikiPageWikiLink Neutron.
- Radionuclide wikiPageWikiLink Neutron_capture.
- Radionuclide wikiPageWikiLink Neutron_cross-section.
- Radionuclide wikiPageWikiLink Neutron_cross_section.