Input interpretation
Ac-209 Kr-69 | half-life
Results
Ac-209 | 100 ms (milliseconds) (-8 to 210 ms) Kr-69 | 32 ms (milliseconds) (20 to 46 ms)
Units
Relative values
| visual | ratios | | comparisons Kr-69 | | 0.32 | 1 | 68% smaller Ac-209 | | 1 | 3.1 | 210% larger
Decay properties
| Ac-209 | Kr-69 half-life | 100 ms (0 to 200 ms) | 32 ms (20 to 46 ms) mean lifetime | 144 ms (-8 to 290 ms) | 46 ms (31.1 to 61.2 ms) decay constant | 6.93 per second | 22 per second specific activity | 2×10^10 TBq/g | 1.9×10^11 TBq/g width | 3.16×10^-15 eV | 1.4×10^-14 eV decay modes | α (alpha emission) | β^+ (positron emission) | β^+ (positron emission) | β^+p (positron + delayed proton) final decay products | Au-197 (70%) | Hg-201 (29%) | Tl-205 (1%) | Ir-193 (7×10^-5%) | Os-189 (7×10^-12%) | Zn-68 (0%)