radioactive half-life


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radioactive half-life

See half-life.
References in periodicals archive ?
The radioactive half-life of plutonium contaminated waste is 27,000 years and the Government estimates it will soon have 500,000 tonnes of higher level nuclear waste it has no home for, even if it never builds another nuclear power station.
Iodine-131 has a radioactive half-life of only about eight days, however, and the risk of harmful exposure decreased rapidly after each bomb test.
The term "depleted uranium" is misleading, however, because this material, which contains the highly toxic U-238 isotope, has a radioactive half-life of at least 4.
As an example of how the method would work, consider technetium-99, with a radioactive half-life of 210,000 years.
Previous PET imaging studies of amyloid plaque have involved the use of 11C-labeled radiopharmaceuticals which have a very short useful lifetime due to the short (20 minute) radioactive half-life of 11C.