Input interpretation
Ac-231 U-237 | decay constant
Results
Ac-231 | 0.00154 per second U-237 | 1.19×10^-6 per second
Relative values
| visual | ratios | | comparisons U-237 | | 7.7×10^-4 | 1 | 99.923% smaller Ac-231 | | 1 | 1290 | 129000% larger
Decay properties
| Ac-231 | U-237 half-life | 7.5 min (7.32 to 7.68 min) | 6.75 days (6.733 to 6.767 days) mean lifetime | 10.8 min (10.6 to 11.1 min) | 9.73 days (9.716 to 9.76 days) decay constant | 0.00154 per second | 1.19×10^-6 per second specific activity | 4.01×10^6 TBq/g | 3020 TBq/g width | 1×10^-18 eV | 7.82×10^-22 eV decay modes | β^- (electron emission) | β^- (electron emission) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-208 (1×10^-12%) | Tl-205 (100%) | Pb-207 (7×10^-10%)