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Naturally occurring strontium is nonradioactive and nontoxic at levels normally found in the environment, but 90 Sr is a radiation hazard. [4] 90 Sr undergoes β − decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an antineutrino, and the yttrium isotope 90 Y, which in turn undergoes β − decay with a half-life of 64 hours and a decay energy ...
Strontium-90 is a radioactive fission product produced by nuclear reactors used in nuclear power. It is a major component of high level radioactivity of nuclear waste and spent nuclear fuel . Its 29-year half life is short enough that its decay heat has been used to power arctic lighthouses, but long enough that it can take hundreds of years to ...
This is a list of radioactive nuclides (sometimes also called isotopes), ... strontium-90: 28.79 909 curium-243: 29.1 920 caesium-137: 30.17 952 10 9 seconds ...
In addition to the four stable isotopes, thirty-two unstable isotopes of strontium are known to exist, ranging from 73 Sr to 108 Sr. Radioactive isotopes of strontium primarily decay into the neighbouring elements yttrium (89 Sr and heavier isotopes, via beta minus decay) and rubidium (85 Sr, 83 Sr and lighter isotopes, via positron emission or ...
Strontium-90 is a commonly used beta emitter used in industrial sources. It decays to yttrium-90, which is itself a beta emitter. It is also used as a thermal power source in radioisotope thermoelectric generator (RTG) power packs. These use heat produced by radioactive decay of strontium-90 to generate heat, which can be converted to ...
In 2008 it conducted a study that found radiation, then publicly documented for the first time in 2023 the detection of radiation involving levels of radium-226 and strontium-90.
According to Irish scientist Kathleen Lonsdale, in the mid-1950s or earlier it was known that strontium 90 is taken up particularly easily by children, that it causes bone tumors, and that "according to the British and American official reports, some children in both countries have already accumulated a measurable amount of radioactive strontium in their bodies."
With the conclusion from Project GABRIEL that radioactive isotope Strontium-90 (Sr-90) represented the most serious threat to human health from nuclear fallout, Project SUNSHINE sought to measure the global dispersion of Sr-90 by measuring its concentration in the tissues and bones of the dead.