Strontium-90 () is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.91years. It undergoes β decay into with a decay energy of 0.546MeV. has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents.
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Strontium-90 () is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.91years. It undergoes β decay into with a decay energy of 0.546MeV. has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents.
==Radioactivity== Naturally occurring strontium () is nonradioactive and nontoxic at levels normally found in the environment, but is a radiation hazard. undergoes β decay with a half-life of 28.91years and a decay energy of 0.546MeV distributed to an electron, an antineutrino, and the yttrium isotope , which in turn undergoes β decay with a half-life of 64.05hours and a decay energy of 2.28MeV distributed to an electron, an antineutrino, and occasionally a gamma ray, leaving stable . The gamma-emitting branches are so weak that for most purposes and can be considered pure beta particle emitters.
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