_in_tin.jpg) Strontium-90 test source in tin | |
| General | |
|---|---|
| Symbol | 90Sr |
| Names | strontium-90, 90Sr, Sr-90 |
| Protons (Z) | 38 |
| Neutrons (N) | 52 |
| Nuclide data | |
| Natural abundance | syn |
| Half-life (t1/2) | 28.79 years |
| Isotope mass | 89.9077279(16)[1] Da |
| Decay products | 90Y |
| Decay modes | |
| Decay mode | Decay energy (MeV) |
| Beta decay | 0.546 |
| 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]
- ^ 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.
- ^ "Table of Isotopes decay data". Lund University. Archived from the original on 18 May 2023. Retrieved 13 October 2014.
- ^ "Strontium | Radiation Protection | US EPA". EPA. 24 April 2012. Archived from the original on 11 May 2012. Retrieved 18 June 2012.