Input interpretation
Ir-189 (iridium-189)
Decay properties
half-life | 13.2 days (13.09 to 13.31 days) mean lifetime | 19.1 days (18.88 to 19.2 days) decay constant | 6.06×10^-7 per second specific activity | 1930 TBq/g (terabecquerels per gram) width | 4×10^-22 eV (electronvolts) decay modes | ϵ (electron capture) final decay products | Os-189 (100%)
Decay mode
decay mode | ϵ (electron capture) Q-value | 532.3 keV (kiloelectronvolts) daughter nuclide | Os-189
Decay chain
Decay chain
Mass properties
atomic number (Z) | 77 mass number (A) | 189 neutron number | 112 atomic mass | 188.958718935 u (unified atomic mass units) mass excess | -38.453064 MeV (megaelectronvolts) binding energy per nucleon | 7.956039 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 3/2^+ (atomic boson) magnetic moment | 0.13 μ_N electric quadrupole moment | 1.04 eb (electron barns)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 94.34 keV (kiloelectronvolts) | 1/2^+ | 1.14×10^-8 seconds | 4×10^-8 eV (electronvolts) 113.832 keV (kiloelectronvolts) | 5/2^+ | 7.6×10^-11 seconds | 6×10^-6 eV (electronvolts) 176.53 keV (kiloelectronvolts) | 3/2^+ | 2.2×10^-11 seconds | 2.1×10^-5 eV (electronvolts) 300.5 keV (kiloelectronvolts) | 7/2^+ | 2×10^-11 seconds | 2.3×10^-5 eV (electronvolts) 317.68 keV (kiloelectronvolts) | 5/2^+ | (unknown) | (unknown) 372.17 keV (kiloelectronvolts) | 11/2^- | 0.0133 seconds | 3.43×10^-14 eV (electronvolts) 453.93 keV (kiloelectronvolts) | 9/2^+ | (unknown) | (unknown) 464.8 keV (kiloelectronvolts) | 7/2^+ | (unknown) | (unknown) 539.74 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 563.76 keV (kiloelectronvolts) | 7/2^- or 9/2^- (uncertain) | (unknown) | (unknown)