Input interpretation
Zr-81 (zirconium-81) | Cu-56 (copper-56)
Decay properties
| Zr-81 | Cu-56 half-life | 5.5 s (5.03 to 5.97 s) | 93 ms (82 to 104 ms) mean lifetime | 7.9 s (7.31 to 8.6 s) | 130 ms (128 to 140 ms) decay constant | 0.13 per second | 7.7 per second specific activity | 9.4×10^8 TBq/g | 8.3×10^10 TBq/g width | 8.3×10^-17 eV | 4.9×10^-15 eV decay modes | β^+ (positron emission) | β^+p (positron + delayed proton) | β^+ (positron emission) | β^+p (positron + delayed proton) final decay products | Br-81 (100%) | Kr-80 (0.12%) | Fe-56 (100%) | Mn-55 (0.4%)
Decay modes
Zr-81
decay mode | β^+ (positron emission) branching ratio | 100% Q-value | 6.507 MeV (megaelectronvolts) daughter nuclide | Y-81 decay mode | β^+p (positron + delayed proton) branching ratio | 0.12% daughter nuclide | Sr-80
Cu-56
decay mode | β^+ (positron emission) branching ratio | 100% Q-value | 14.281 MeV (megaelectronvolts) daughter nuclide | Ni-56 decay mode | β^+p (positron + delayed proton) branching ratio | 0.4% daughter nuclide | Co-55
Radiation shielding
Radiation shielding
Decay chain
Zr-81
Decay chain Zr-81
Cu-56
Decay chain Cu-56
Mass properties
| Zr-81 | Cu-56 atomic number (Z) | 40 | 29 mass number (A) | 81 | 56 neutron number | 41 | 27 atomic mass | 80.937210026 u (unified atomic mass units) | 55.95856 u (unified atomic mass units) mass excess | -58.488484 MeV (megaelectronvolts) | -38.601 MeV (megaelectronvolts) binding energy per nucleon | 8.407053 MeV (megaelectronvolts) | 8.355 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Zr-81 | Cu-56 spin parity J^π | 3/2^- (atomic fermion) | 4^+ (atomic fermion)
Quantum properties