Input interpretation
Pu-240 (plutonium-240) | Hs-271 (hassium-271)
Decay properties
| Pu-240 | Hs-271 half-life | 6561 yr (6540 to 6580 yr) | 40 s mean lifetime | 9466 yr (9430 to 9500 yr) | 58 s decay constant | 3.35×10^-12 per second | 0.017 per second specific activity | 8.404 GBq/g | 3.8×10^7 TBq/g width | 1.528×10^-27 eV | 1.1×10^-17 eV decay modes | α (alpha emission) | SF (spontaneous fission) | ^34Si (cluster emission) | α (alpha emission) | SF (spontaneous fission) final decay products | Pb-208 (100%) | Pb-206 (4×10^-9%) | Pb-204 (0%) | Hg-200 (0%) | Hg-204 (0%) | Pb-206 (0%) | Pb-207 (0%) | Pb-208 (0%) | Tl-205 (0%)
Decay modes
Pu-240
decay mode | α (alpha emission) branching ratio | 100% Q-value | 5.25575 MeV (megaelectronvolts) daughter nuclide | U-236 decay mode | SF (spontaneous fission) branching ratio | 5.7×10^-6% decay mode | ^34Si (cluster emission) branching ratio | 1.3×10^-13% daughter nuclide | Hg-206
Hs-271
decay mode | α (alpha emission) Q-value | 9.9 MeV (megaelectronvolts) daughter nuclide | Sg-267 decay mode | SF (spontaneous fission)
Radiation shielding
| Pu-240 lead | 16 µm water | 40.5 µm air | 36.9 mm
Decay chain
Pu-240
Decay chain Pu-240
Hs-271
Decay chain Hs-271
Mass properties
| Pu-240 | Hs-271 atomic number (Z) | 94 | 108 mass number (A) | 240 | 271 neutron number | 146 | 163 atomic mass | 240.053813545 u (unified atomic mass units) | 271.137657 u (unified atomic mass units) mass excess | 50.126995 MeV (megaelectronvolts) | 128.226 MeV (megaelectronvolts) binding energy per nucleon | 7.556036 MeV (megaelectronvolts) | 7.286 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Pu-240 spin parity J^π | 0^+ (atomic boson) magnetic moment | 0 μ_N
Quantum properties