Input interpretation
Cm-240 | decay modes
Result
α (alpha emission) | ϵ (electron capture) | SF (spontaneous fission)
Decay properties
half-life | 27 days (25.6 to 28.4 days) mean lifetime | 39 days (37.2 to 43 days) decay constant | 2.9×10^-7 per second specific activity | 740 TBq/g (terabecquerels per gram) width | 2×10^-22 eV (electronvolts) decay modes | α (alpha emission) | ϵ (electron capture) | SF (spontaneous fission) final decay products | Pb-208 (100%) | Pb-206 (4×10^-9%) | Hg-204 (5×10^-12%) | Pb-204 (0%) | Hg-200 (0%)
Decay modes
decay mode | α (alpha emission) branching ratio | 100% Q-value | 6.3978 MeV (megaelectronvolts) daughter nuclide | Pu-236 decay mode | ϵ (electron capture) branching ratio | 0.5% Q-value | 213.6 keV (kiloelectronvolts) daughter nuclide | Am-240 decay mode | SF (spontaneous fission) branching ratio | 3.9×10^-6%