Samarium-147
| General | |
|---|---|
| Symbol | 147Sm |
| Names | Samarium-147 |
| Protons (Z) | 62 |
| Neutrons (N) | 85 |
| Nuclide data | |
| Natural abundance | 15.00% |
| Half-life (t1/2) | 1.06×1011 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 |
| 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 1.06×1011 years, although measurements have ranged from 1.05×1011 to 1.17×1011 years. It is mainly used in radiometric dating.