Input interpretation
Ac-231 U-237 | decay modes
Results
Ac-231 | β^- (electron emission) U-237 | β^- (electron emission)
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%)
Decay modes
Ac-231
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 2.1 MeV (megaelectronvolts) daughter nuclide | Th-231
U-237
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 518.6 keV (kiloelectronvolts) daughter nuclide | Np-237