Input interpretation
Ac-227 Ac-223 | half-life
Results
Ac-227 | 21.772 years (21.763 to 21.781 yr) Ac-223 | 126 seconds (120 to 132 s)
Units
Relative values
| visual | ratios | | comparisons Ac-223 | | 1.84×10^-7 | 1 | 99.9999816% smaller Ac-227 | | 1 | 5.45 million | 5.45×10^8% larger
Decay properties
| Ac-227 | Ac-223 half-life | 21.772 yr (21.764 to 21.78 yr) | 126 s (120 to 132 s) mean lifetime | 31.41 yr (31.398 to 31.423 yr) | 182 s (171 to 193 s) decay constant | 1.0095×10^-9 per second | 0.0055 per second specific activity | 2.6779 TBq/g | 1.49×10^7 TBq/g width | 4.6055×10^-25 eV | 2.51×10^-18 eV decay modes | β^- (electron emission) | α (alpha emission) | α (alpha emission) | ϵ (electron capture) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-207 (100%) | Tl-205 (9×10^-10%)