Physical Characteristics of Common Radionuclides Used in Radiotherapy (89)
| Radionuclide | Half-life (h) | Maximum energy | Maximum particle range in soft tissue (mm) |
| 177L | 162 | β (498 keV), γ (208 keV) | 2 |
| 90Y | 64 | β (2,250 keV) | 11 |
| 131I | 193 | β (610 keV), γ (362 keV) | 2.9 |
| 225Ac | 240 | α (6 MeV) | No clear range because of successive α-emissions |