decay modes of U-238 vs U-235

U-238 U-235 | decay modes

U-238 | α (alpha emission) | SF (spontaneous fission) | 2β^- (double beta decay) U-235 | α (alpha emission) | SF (spontaneous fission) | ^28Mg (cluster emission) | ^25Ne (cluster emission) | ^20Ne (cluster emission)

| U-238 | U-235 half-life | 4.47 Gyr (4.464 to 4.4745 Gyr) | 0.704 Gyr (702.2 to 706.6 Myr) mean lifetime | 6.45 Gyr (6.4453 to 6.4552 Gyr) | 1.02 Gyr (1.014 to 1.019 Gyr) decay constant | 4.916×10^-18 per second | 3.12×10^-17 per second specific activity | 12.44 kBq/g | 79.8 kBq/g width | 3.236×10^-33 eV | 2.05×10^-32 eV decay modes | α (alpha emission) | SF (spontaneous fission) | 2β^- (double beta decay) | α (alpha emission) | SF (spontaneous fission) | ^28Mg (cluster emission) | ^25Ne (cluster emission) | ^20Ne (cluster emission) final decay products | Pb-206 (100%) | Tl-205 (1.9×10^-6%) | Pb-208 (2.6×10^-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%) | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-206 (8×10^-10%) | Pb-208 (1×10^-12%)

decay mode | α (alpha emission) branching ratio | 100% Q-value | 4.26975 MeV (megaelectronvolts) daughter nuclide | Th-234 decay mode | SF (spontaneous fission) branching ratio | 5.45×10^-5% decay mode | 2β^- (double beta decay) branching ratio | 2.2×10^-10% Q-value | 1.1442 MeV (megaelectronvolts) daughter nuclide | Pu-238

decay mode | α (alpha emission) branching ratio | 100% Q-value | 4.67826 MeV (megaelectronvolts) daughter nuclide | Th-231 decay mode | SF (spontaneous fission) branching ratio | 7×10^-9% decay mode | ^28Mg (cluster emission) branching ratio | 8×10^-10% daughter nuclide | Hg-207 decay mode | ^25Ne (cluster emission) branching ratio | 8×10^-10% daughter nuclide | Pb-210 decay mode | ^20Ne (cluster emission) branching ratio | 8×10^-10% daughter nuclide | Pb-215