Input interpretation
Np-235 | decay modes
Result
ϵ (electron capture) | α (alpha emission)
Decay properties
half-life | 396.1 days (394.85 to 397.35 days) mean lifetime | 571.4 days (1.5608 to 1.5705 yr) decay constant | 2.026×10^-8 per second specific activity | 51.9 TBq/g (terabecquerels per gram) width | 1.333×10^-23 eV (electronvolts) decay modes | ϵ (electron capture) | α (alpha emission) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-206 (8×10^-10%) | Pb-208 (1×10^-12%)
Decay modes
decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 124.214 keV (kiloelectronvolts) daughter nuclide | U-235 decay mode | α (alpha emission) branching ratio | 0.0026% Q-value | 5.19403 MeV (megaelectronvolts) daughter nuclide | Pa-231