radioisotope

Decaying atomic variant

A radioisotope is an unstable form of a chemical element that emits radiation as it decays.

Radioisotopes occur naturally or are produced artificially for use in medicine, research, and industry: The scan uses a radioisotope to track blood flow.

Carbon-14 dating relies on the predictable decay of that radioisotope in organic material.

medical

technetium-99m

Metastable medical radioisotope

  • iodine-131Radioactive halogen isotope
  • PETNuclear medicine imaging
  • SPECTGamma-emitting radiotracer imaging method

tracer · diagnosis · therapy · oncology · thyroid · imaging · molecular · diagnostic · radiolabeling · brachytherapy

dating

carbon-14

Radioactive isotope for dating

half-life · geochronology · archaeology · paleontology · fossils · stratigraphy · calibration · chronometry · sample · artifact

decay

half-life

Period for fifty-percent reduction

  • alphaFirst Greek letter
  • betaGreek alphabet's second letter
  • gammaGreek alphabet's third

unstable · stable · daughter · parent · transmutation · neutron · positron · electron · antineutrino · ionizing

production

cyclotron

Spiral-path particle accelerator

purification · generator · transmutation · radiochemistry · shielding

nuclear

uranium-235

Fissile nuclear isotope

neutron · enrichment · breeder · moderator · coolant · reprocessing · proliferation · fallout · centrifuge · yellowcake

power

strontium-90

Radioactive isotope from fission

Pioneer · Cassini · Curiosity · generator · heat · watt · longevity · remote · battery · conversion

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radioisotopes

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Used worldwide · Timeless · Rated G