Input interpretation
Ac-208 Pb-181 | half-life
Results
Ac-208 | 95 ms (milliseconds) (60 to 130 ms) Pb-181 | 45 ms (milliseconds) (21 to 74 ms)
Units
Relative values
| visual | ratios | | comparisons Pb-181 | | 0.47 | 1 | 53% smaller Ac-208 | | 1 | 2.1 | 110% larger
Decay properties
| Ac-208 | Pb-181 half-life | 95 ms (70 to 130 ms) | 45 ms (21 to 73 ms) mean lifetime | 140 ms (90 to 190 ms) | 65 ms (35.1 to 95.1 ms) decay constant | 7.3 per second | 15 per second specific activity | 2.1×10^10 TBq/g | 5.1×10^10 TBq/g width | 3.3×10^-15 eV | 1×10^-14 eV decay modes | α (alpha emission) | β^+ (positron emission) | α (alpha emission) | β^+ (positron emission) final decay products | Hg-196 (60%) | Hg-200 (40%) | Pb-204 (0.05%) | Pt-192 (6×10^-4%) | Pb-208 (4×10^-8%) | Os-188 (3×10^-11%) | Os-184 (7×10^-18%) | Hf-176 (0%) | Hf-180 (0%) | Pt-196 (0%) | W-180 (0%) | W-184 (0%) | Tm-169 (60%) | Yb-173 (26%) | Ho-165 (8%) | Dy-161 (0.02%) | Gd-157 (2×10^-5%) | Eu-153 (5×10^-8%) | Sm-149 (4×10^-8%) | Nd-145 (9×10^-9%) | Pr-141 (2×10^-17%) | Hf-176 (0%) | Hf-177 (0%) | Hf-180 (0%) | Ta-181 (0%) | W-180 (0%)