Input interpretation
U-235 (uranium-235) | U-234 (uranium-234) | U-232 (uranium-232)
Natural abundance
U-235 | U-234 | U-232 0.7204% | 0.0054% | 0%
Decay properties
| U-235 | U-234 | U-232 half-life | 0.704 Gyr (702.2 to 706.6 Myr) | 0.2455 Myr (-4 to 4 Myr) | 68.8 yr (68.46 to 69.42 yr) mean lifetime | 1.02 Gyr (1.014 to 1.019 Gyr) | 0.3542 Myr (-8 to 8 Myr) | 99.6 yr (98.81 to 100.1 yr) decay constant | 3.12×10^-17 per second | 8.953×10^-14 per second | 3.18×10^-10 per second specific activity | 79.8 kBq/g | 230.4 MBq/g | 827 GBq/g width | 2.05×10^-32 eV | 4.084×10^-29 eV | 2.1×10^-25 eV decay modes | α (alpha emission) | SF (spontaneous fission) | ^28Mg (cluster emission) | ^25Ne (cluster emission) | ^20Ne (cluster emission) | α (alpha emission) | SF (spontaneous fission) | ^28Mg (cluster emission) | ^24Ne +^26Ne (double cluster emission) | α (alpha emission) | ^24Ne (cluster emission) | ^28Mg (cluster emission) | SF (spontaneous fission) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-206 (8×10^-10%) | Pb-208 (1×10^-12%) | Pb-206 (100%) | Tl-205 (1.9×10^-6%) | Pb-208 (2.6×10^-9%) | W-184 (9×10^-12%) | Hf-180 (0%) | Pb-208 (100%) | Pb-206 (4×10^-9%) | Hg-204 (5×10^-12%) | Pb-204 (0%) | Hg-200 (0%)
Biological properties
| U-235 biological half-life | 15 days biological lifetime | 22 days effective half-life | 15 days effective lifetime | 22 days
Decay modes
U-235
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
U-234
decay mode | α (alpha emission) branching ratio | 100% Q-value | 4.85773 MeV (megaelectronvolts) daughter nuclide | Th-230 decay mode | SF (spontaneous fission) branching ratio | 1.73×10^-9% decay mode | ^28Mg (cluster emission) branching ratio | 1.4×10^-11% daughter nuclide | Hg-206 decay mode | ^24Ne +^26Ne (double cluster emission) branching ratio | 9×10^-12% daughter nuclide | Hf-184
U-232
decay mode | α (alpha emission) branching ratio | 100% Q-value | 5.41363 MeV (megaelectronvolts) daughter nuclide | Th-228 decay mode | ^24Ne (cluster emission) branching ratio | 8.9×10^-10% daughter nuclide | Pb-208 decay mode | ^28Mg (cluster emission) branching ratio | 5×10^-12% daughter nuclide | Hg-204 decay mode | SF (spontaneous fission) branching ratio | 1×10^-12%
Radiation shielding
| U-235 | U-234 | U-232 lead | 13.8 µm | 14.5 µm | 16.6 µm water | 34 µm | 36 µm | 42.4 µm air | 31 mm | 32.8 mm | 38.6 mm
Decay chain
U-235
Decay chain U-235
U-234
Decay chain U-234
U-232
Decay chain U-232
Mass properties
| atomic number (Z) | mass number (A) | neutron number U-235 | 92 | 235 | 143 U-234 | 92 | 234 | 142 U-232 | 92 | 232 | 140 | atomic mass | mass excess | binding energy per nucleon U-235 | 235.043929918 u (unified atomic mass units) | 40.920456 MeV (megaelectronvolts) | 7.590907 MeV (megaelectronvolts) U-234 | 234.040952088 u (unified atomic mass units) | 38.146625 MeV (megaelectronvolts) | 7.600708 MeV (megaelectronvolts) U-232 | 232.037156152 u (unified atomic mass units) | 34.610734 MeV (megaelectronvolts) | 7.611892 MeV (megaelectronvolts)
Mass properties