Decay Characteristics of 177Lu and 161Tb (5)
| Characteristic | 177Lu | 161Tb |
|---|---|---|
| Half-life (d) | 6.647 | 6.906 |
| Type of decay (%) | β− (100%) | β− (100%) |
| β particles mean energy (keV) | 133.3 | 154.3 |
| Daughter | 177Hf (stable) | 161Dy (stable) |
| Conversion electrons (keV per decay) | 13.52 | 39.28 |
| Conversion electron energy range (keV) | 6.2–206.3 (weighted average, 87) | 3.3–98.3 (weighted average, 28) |
| Auger electrons (keV per decay) | 1.13 | 8.94 |
| Auger electron energy range (keV) | 0.01–61.7 (weighted average, 1) | 0.018–50.9 (weighted average, 0.8) |
| Total electron energy per decay (keV) | 147.9 | 202.5 |
| γ for imaging: energy in keV (% abundance) | 208 (11%); 113 (6.4%) | 75 (10.2%) |
| Photon X and γ (total energy per decay in keV) | 35.1 | 36.35 |