| General | |
|---|---|
| Symbol | 147Sm |
| Names | Samarium-147 |
| Protons (Z) | 62 |
| Neutrons (N) | 85 |
| Nuclide data | |
| Natural abundance | 15.00% |
| Half-life (t1/2) | 1.07×1011 years |
| Isotope mass | 146.9148979(26) Da |
| Spin | 7/2− |
| Parent isotopes | 147Pm (β−) 151Gd (α) |
| Decay products | 143Nd |
| Decay modes | |
| Decay mode | Decay energy (MeV) |
| α | 2.3113[1] |
| Isotopes of samarium Complete table of nuclides | |
Samarium-147 (147Sm or Sm-147) is an isotope of samarium, making up 15% of natural samarium. It is an extremely long-lived radioisotope, with a half-life of 1.07×1011 years, and an alpha emitter, the only significant one outside the heavy decay chains from thorium and uranium.
- ^ 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.
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