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Strontium-90
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<p>Strontium-90 (90Sr) is a <a href="/facts/Radioactive/Ya6FVjt4">radioactive</a> <a href="/facts/Isotopes_of_strontium/ljDHPVaV">isotope of strontium</a> produced by <a href="/facts/Nuclear_fission/LfkIylvm">nuclear fission</a>, with a <a href="/facts/Half-life/kGVH8BAB">half-life</a> of 28.79 years. It undergoes <a href="/facts/Beta_decay/vxTBlckp">β− decay</a> into <a href="/facts/Yttrium-90/psD38nkq">yttrium-90</a>, with a <a href="/facts/Decay_energy/g4wDGC8r">decay energy</a> of 0.546 MeV. Strontium-90 has applications in medicine and industry and is an <a href="/facts/Isotope/KD9B1y6o">isotope</a> of concern in <a href="/facts/Nuclear_fallout/I1kJkLKt">fallout</a> from <a href="/facts/Nuclear_weapons/QVdBcMdm">nuclear weapons</a>, <a href="/facts/Nuclear_weapons_testing/s2srGDFP">nuclear weapons testing</a>, and <a href="/facts/Nuclear_accidents/Sqcvbk0e">nuclear accidents</a>. </p>