Am-243 vs Ir-166

Am-243 (americium-243) | Ir-166 (iridium-166)

| Am-243 | Ir-166 half-life | 7390 yr (7326 to 7425 yr) | 10.5 ms (8.18 to 12.72 ms) mean lifetime | 10700 yr (10570 to 10710 yr) | 15.1 ms (11.96 to 18.34 ms) decay constant | 2.98×10^-12 per second | 66.2 per second specific activity | 7.37 GBq/g | 2.4×10^11 TBq/g width | 1.96×10^-27 eV | 4.35×10^-14 eV decay modes | α (alpha emission) | SF (spontaneous fission) | α (alpha emission) | p (proton emission) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-206 (8×10^-10%) | Pb-208 (1×10^-12%) | Sm-149 (1%) | Nd-145 (0.2%) | Sm-144 (0.09%) | Ce-140 (2×10^-5%) | Pr-141 (6×10^-10%) | Dy-158 (0%) | Dy-161 (0%) | Dy-162 (0%) | Er-162 (0%) | Eu-153 (0%) | Gd-154 (0%) | Gd-157 (0%) | Gd-158 (0%) | Ho-165 (0%) | Nd-142 (0%) | Sm-150 (0%) | Sm-152 (0%)

decay mode | α (alpha emission) branching ratio | 100% Q-value | 5.43881 MeV (megaelectronvolts) daughter nuclide | Np-239 decay mode | SF (spontaneous fission) branching ratio | 3.7×10^-9%

decay mode | α (alpha emission) branching ratio | 93% Q-value | 6.72425 MeV (megaelectronvolts) daughter nuclide | Re-162 decay mode | p (proton emission) branching ratio | 7% Q-value | 1.152 MeV (megaelectronvolts) daughter nuclide | Os-165

| Am-243 lead | 16.7 µm water | 42.7 µm air | 38.9 mm

Decay chain Am-243

Decay chain Ir-166

| Am-243 | Ir-166 atomic number (Z) | 95 | 77 mass number (A) | 243 | 166 neutron number | 148 | 89 atomic mass | 243.06138108 u (unified atomic mass units) | 165.985824 u (unified atomic mass units) mass excess | 57.176109 MeV (megaelectronvolts) | -13.205 MeV (megaelectronvolts) binding energy per nucleon | 7.530169 MeV (megaelectronvolts) | 7.788 MeV (megaelectronvolts)

Mass properties