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Copper (29 Cu) has two stable isotopes, 63 Cu and 65 Cu, along with 28 radioisotopes. The most stable radioisotope is 67 Cu with a half-life of 61.83 hours. Most of the others have half-lives under a minute. Unstable copper isotopes with atomic masses below 63 tend to undergo β + decay, while isotopes with atomic masses above 65 tend to ...
This page lists radioactive nuclides by their half-life.
Copper-64 (64 Cu) is a positron and beta emitting isotope of copper, with applications for molecular radiotherapy and positron emission tomography. Its unusually long half-life (12.7-hours) for a positron-emitting isotope makes it increasingly useful when attached to various ligands , for PET and PET-CT scanning.
used in radioisotope thermoelectric generators (RTGs) and radioisotope heater units as an energy source for spacecraft Plutonium-239: 94: 145: 24,110 y: α: 5245 Synthetic: used for most modern nuclear weapons Americium-241: 95: 146: 432 y: α: 5486 Synthetic: used in household smoke detectors as an ionising agent Californium-252: 98: 154: 2.64 ...
Radiometric dating, radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon, ...
Primordial radioisotopes are easily detected with half-lives as short as 700 million years (e.g., 235 U). This is the present limit of detection, [ citation needed ] as shorter-lived nuclides have not yet been detected undisputedly in nature except when recently produced, such as decay products or cosmic ray spallation.
Radioisotopes of hydrogen, carbon, phosphorus, sulfur, and iodine have been used extensively to trace the path of biochemical reactions. A radioactive tracer can also be used to track the distribution of a substance within a natural system such as a cell or tissue , [ 1 ] or as a flow tracer to track fluid flow .
Naturally occurring radioactive materials (NORM) and technologically enhanced naturally occurring radioactive materials (TENORM) consist of materials, usually industrial wastes or by-products enriched with radioactive elements found in the environment, such as uranium, thorium and potassium and any of their decay products, such as radium and radon. [1]