Input interpretation
Ac-221 Gd-136 | half-life
Results
Ac-221 | 52 ms (milliseconds) (49.3 to 54.7 ms) Gd-136 | 200 ns (nanoseconds) (1.98×10^-7 to ∞ s)
Units
Relative values
| visual | ratios | | comparisons Gd-136 | | 3.8×10^-6 | 1 | 99.99962% smaller Ac-221 | | 1 | 260000 | 2.6×10^7% larger
Decay properties
| Ac-221 | Gd-136 half-life | 52 ms (49.4 to 54.6 ms) | 200 ns (1.99×10^-7 to ∞ s) mean lifetime | 75 ms (71.3 to 78.7 ms) | 289 ns (2.85×10^-7 to ∞ s) decay constant | 13 per second | 3.47×10^6 per second specific activity | 3.6×10^10 TBq/g | 1.54×10^16 TBq/g width | 8.8×10^-15 eV | 1.58×10^-9 eV decay modes | α (alpha emission) | β^+ (positron emission) final decay products | Tl-205 (100%) | Ba-135 (0%) | Ba-136 (0%) | Ce-136 (0%)