Input interpretation
Fm-259 Rf-261 | mean lifetime
Results
Fm-259 | 2.2 seconds (1.71 to 2.63 s) Rf-261 | 94 seconds (70 to 120 s)
Units
Decay properties
| Fm-259 | Rf-261 half-life | 1.5 s (1.18 to 1.82 s) | 65 s (50 to 80 s) mean lifetime | 2.2 s (1.71 to 2.62 s) | 94 s (70 to 120 s) decay constant | 0.45 per second | 0.011 per second specific activity | 1.1×10^9 TBq/g | 2.5×10^7 TBq/g width | 3×10^-16 eV | 4.9×10^-18 eV decay modes | SF (spontaneous fission) | α (alpha emission) | SF (spontaneous fission) final decay products | | Tl-205 (60%) | Pb-207 (4×10^-10%)