Input interpretation
Th-224 Ac-221 | half-life
Results
Th-224 | 810 ms (milliseconds) (700 to 920 ms) Ac-221 | 52 ms (milliseconds) (49.3 to 54.7 ms)
Units
Relative values
| visual | ratios | | comparisons Ac-221 | | 0.064 | 1 | 93.6% smaller Th-224 | | 1 | 16 | 1500% larger
Decay properties
| Th-224 | Ac-221 half-life | 810 ms (700 to 920 ms) | 52 ms (49.4 to 54.6 ms) mean lifetime | 1.17 s (1 to 1.34 s) | 75 ms (71.3 to 78.7 ms) decay constant | 0.856 per second | 13 per second specific activity | 2.3×10^9 TBq/g | 3.6×10^10 TBq/g width | 3.9×10^-16 eV | 8.8×10^-15 eV decay modes | α (alpha emission) | 2β^+ (double beta decay) | α (alpha emission) final decay products | Pb-208 (100%) | Pb-206 (0%) | Tl-205 (100%)