Input interpretation
Ir-189 (iridium-189) | Er-158 (erbium-158)
Decay properties
| Ir-189 | Er-158 half-life | 13.2 days (13.09 to 13.31 days) | 137.3 min (133.7 to 141.1 min) mean lifetime | 19.1 days (18.88 to 19.2 days) | 198 min (192.99 to 203.51 min) decay constant | 6.06×10^-7 per second | 8.4×10^-5 per second specific activity | 1930 TBq/g | 320000 TBq/g width | 4×10^-22 eV | 5.53×10^-20 eV decay modes | ϵ (electron capture) | ϵ (electron capture) final decay products | Os-189 (100%) | Dy-158 (100%) | Gd-154 (0) | Gd-158 (0) | Nd-142 (0) | Sm-150 (0)
Decay modes
Ir-189
decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 532.3 keV (kiloelectronvolts) daughter nuclide | Os-189
Er-158
decay mode | ϵ (electron capture) branching ratio | 100% Q-value | 887.2 keV (kiloelectronvolts) daughter nuclide | Ho-158
Radiation shielding
Radiation shielding
Decay chain
Ir-189
Decay chain Ir-189
Er-158
Decay chain Er-158
Mass properties
| Ir-189 | Er-158 atomic number (Z) | 77 | 68 mass number (A) | 189 | 158 neutron number | 112 | 90 atomic mass | 188.958718935 u (unified atomic mass units) | 157.929893474 u (unified atomic mass units) mass excess | -38.453064 MeV (megaelectronvolts) | -65.303809 MeV (megaelectronvolts) binding energy per nucleon | 7.956039 MeV (megaelectronvolts) | 8.147926 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Ir-189 | Er-158 spin parity J^π | 3/2^+ (atomic boson) | 0^+ (atomic boson) magnetic moment | 0.13 μ_N | 0 μ_N electric quadrupole moment | 1.04 eb (electron barns) | (unknown)
Quantum properties