Strontium-90
 Strontium-90 test source in tin | |
| General | |
|---|---|
| Symbol | 90Sr |
| Names | strontium-90 |
| Protons (Z) | 38 |
| Neutrons (N) | 52 |
| Nuclide data | |
| Natural abundance | syn |
| Half-life (t1/2) | 28.91 years |
| Isotope mass | 89.907728 Da |
| Decay products | 90Y |
| Decay modes | |
| Decay mode | Decay energy (MeV) |
| Beta decay | 0.546 |
| Isotopes of strontium Complete table of nuclides | |
Strontium-90 (90Sr) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.91 years. It undergoes β− decay into 90Y (yttrium-90) with a decay energy of 546 keV. 90Sr has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents.