Input interpretation
Pu-241 (plutonium-241) | Pm-146 (promethium-146)
Decay properties
| Pu-241 | Pm-146 half-life | 14.29 yr (14.28 to 14.3 yr) | 5.53 yr (5.4 to 5.7 yr) mean lifetime | 20.616 yr (20.59 to 20.64 yr) | 7.98 yr (7.7 to 8.2 yr) decay constant | 1.5381×10^-9 per second | 3.97×10^-9 per second specific activity | 3.8425 TBq/g | 16.4 TBq/g width | 7.0168×10^-25 eV | 1.81×10^-24 eV decay modes | β^- (electron emission) | α (alpha emission) | SF (spontaneous fission) | ϵ (electron capture) | β^- (electron emission) final decay products | Tl-205 (100%) | Pb-207 (7×10^-10%) | Nd-146 (66%) | Nd-142 (34%) | Ba-138 (0%) | Ce-142 (0%)
Decay modes
Pu-241
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 20.783 keV (kiloelectronvolts) daughter nuclide | Am-241 decay mode | α (alpha emission) branching ratio | 0.00245% Q-value | 5.14 MeV (megaelectronvolts) daughter nuclide | U-237 decay mode | SF (spontaneous fission) branching ratio | 2.4×10^-14%
Pm-146
decay mode | ϵ (electron capture) branching ratio | 66% Q-value | 1.47117 MeV (megaelectronvolts) daughter nuclide | Nd-146 decay mode | β^- (electron emission) branching ratio | 34% Q-value | 1.542 MeV (megaelectronvolts) daughter nuclide | Sm-146
Radiation shielding
| Pu-241 lead | 2.19 µm portland concrete | 4.97 µm water | 9.17 µm air | 8.21 mm
Decay chain
Pu-241
Decay chain Pu-241
Pm-146
Decay chain Pm-146
Mass properties
| Pu-241 | Pm-146 atomic number (Z) | 94 | 61 mass number (A) | 241 | 146 neutron number | 147 | 85 atomic mass | 241.056851456 u (unified atomic mass units) | 145.914696305 u (unified atomic mass units) mass excess | 52.956791 MeV (megaelectronvolts) | -79.45988 MeV (megaelectronvolts) binding energy per nucleon | 7.546432 MeV (megaelectronvolts) | 8.288692 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Pu-241 | Pm-146 spin parity J^π | 5/2^+ (atomic fermion) | 3^- (atomic fermion) magnetic moment | -0.683 μ_N | (unknown) electric quadrupole moment | 5.6 eb (electron barns) | (unknown)
Quantum properties