Input interpretation
Db-256 (dubnium-256) | Es-250 (einsteinium-250)
Decay properties
| Db-256 | Es-250 half-life | 1.6 s (1 to 2.7 s) | 8.6 h (8.39 to 8.8 h) mean lifetime | 2.3 s (1 to 4.1 s) | 12 h (12 to 12.7 h) decay constant | 0.43 per second | 2.2×10^-5 per second specific activity | 1×10^9 TBq/g | 54000 TBq/g width | 2×10^-16 eV | 1.5×10^-20 eV decay modes | β^+ (positron emission) | SF (spontaneous fission) | α (alpha emission) | β^+ (positron emission) | α (alpha emission) final decay products | Pb-208 (0.08%) | Pb-206 (3×10^-12%) | Hg-204 (4×10^-15%) | Pb-204 (0%) | Hg-200 (0%) | Pb-206 (100%) | Tl-205 (2×10^-6%) | Pb-208 (2.5×10^-9%) | W-184 (9×10^-12%) | Yb-168 (5×10^-27%) | Er-164 (4×10^-27%) | Dy-160 (2×10^-28%) | Dy-156 (1×10^-30%) | Sm-144 (1×10^-31%) | Ce-140 (1×10^-32%) | Dy-164 (0%) | Er-168 (0%) | Gd-156 (0%) | Hf-176 (0%) | Hf-180 (0%) | Sm-152 (0%) | Yb-172 (0%)
Decay modes
Db-256
decay mode | β^+ (positron emission) branching ratio | 36% Q-value | 5.462 MeV (megaelectronvolts) daughter nuclide | Rf-256 decay mode | SF (spontaneous fission) decay mode | α (alpha emission) Q-value | 9.457 MeV (megaelectronvolts) daughter nuclide | Lr-252
Es-250
decay mode | β^+ (positron emission) branching ratio | 97% Q-value | 1.033 MeV (megaelectronvolts) daughter nuclide | Cf-250 decay mode | α (alpha emission) Q-value | 6.833 MeV (megaelectronvolts) daughter nuclide | Bk-246
Radiation shielding
Radiation shielding
Decay chain
Db-256
Decay chain Db-256
Es-250
Decay chain Es-250
Mass properties
| Db-256 | Es-250 atomic number (Z) | 105 | 99 mass number (A) | 256 | 250 neutron number | 151 | 151 atomic mass | 256.108127 u (unified atomic mass units) | 250.078612 u (unified atomic mass units) mass excess | 100.72 MeV (megaelectronvolts) | 73.227 MeV (megaelectronvolts) binding energy per nucleon | 7.357 MeV (megaelectronvolts) | 7.469 MeV (megaelectronvolts)
Mass properties