Strontium-90

Strontium-90, 90Sr
Strontium-90 test source in tin
General
Symbol90Sr
Namesstrontium-90, 90Sr, Sr-90
Protons (Z)38
Neutrons (N)52
Nuclide data
Natural abundancesyn
Half-life (t1/2)28.79 years
Isotope mass89.9077279(16)[1] Da
Decay products90Y
Decay modes
Decay modeDecay energy (MeV)
Beta decay0.546
Isotopes of strontium
Complete table of nuclides

Strontium-90 (90
Sr
) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.8 years. It undergoes β decay into yttrium-90, with a decay energy of 0.546 MeV.[2] Strontium-90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents.[3]

  1. ^ Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references". Chinese Physics C. 45 (3): 030003. doi:10.1088/1674-1137/abddaf.
  2. ^ "Table of Isotopes decay data". Lund University. Archived from the original on 18 May 2023. Retrieved 13 October 2014.
  3. ^ "Strontium | Radiation Protection | US EPA". EPA. 24 April 2012. Archived from the original on 11 May 2012. Retrieved 18 June 2012.