Input interpretation
Ir-174 (iridium-174)
Decay properties
half-life | 7.9 seconds (6.4 to 9.4 s) mean lifetime | 11 seconds (10.5 to 12.3 s) decay constant | 0.091 per second specific activity | 3.1×10^8 TBq/g (terabecquerels per gram) width | 5.8×10^-17 eV (electronvolts) decay modes | β^+ (positron emission) | α (alpha emission) final decay products | Yb-170 (100%) | Er-166 (0.005%) | Yb-174 (0%)
Decay modes
decay mode | β^+ (positron emission) branching ratio | 99.5% Q-value | 8.1054 MeV (megaelectronvolts) daughter nuclide | Os-174 decay mode | α (alpha emission) branching ratio | 0.5% Q-value | 5.6241 MeV (megaelectronvolts) daughter nuclide | Re-170
Decay chain
Decay chain
Mass properties
atomic number (Z) | 77 mass number (A) | 174 neutron number | 97 atomic mass | 173.966861045 u (unified atomic mass units) mass excess | -30.868738 MeV (megaelectronvolts) binding energy per nucleon | 7.902513 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 3^+ (atomic fermion)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 193 keV (kiloelectronvolts) | 7^+ | 4.9 seconds | 9.3×10^-17 eV (electronvolts)