Input interpretation
Ir-170 (iridium-170) | Ra-203 (radium-203)
Decay properties
| Ir-170 | Ra-203 half-life | 870 ms (0.73 to 1.07 s) | 31 ms (8 to 51 ms) mean lifetime | 1.26 s (1.05 to 1.55 s) | 45 ms (10 to 77 ms) decay constant | 0.797 per second | 22 per second specific activity | 2.82×10^9 TBq/g | 6.6×10^10 TBq/g width | 3.63×10^-16 eV | 1×10^-14 eV decay modes | β^+ (positron emission) | α (alpha emission) | α (alpha emission) | β^+ (positron emission) final decay products | Yb-170 (86%) | Er-166 (9%) | Er-162 (0.0029%) | Dy-158 (2×10^-7%) | Nd-142 (5×10^-12%) | Dy-162 (0%) | Gd-154 (0%) | Gd-158 (0%) | Sm-150 (0%) | Pt-195 (29%) | Os-187 (0.009%) | W-183 (3×10^-7%) | Hf-179 (1×10^-10%) | Ir-191 (0%) | Hg-199 (0%) | Tl-203 (0%)
Decay modes
Ir-170
decay mode | β^+ (positron emission) branching ratio | 94.8% Q-value | 9.586 MeV (megaelectronvolts) daughter nuclide | Os-170 decay mode | α (alpha emission) branching ratio | 5.2% Q-value | 6.105 MeV (megaelectronvolts) daughter nuclide | Re-166
Ra-203
decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.7296 MeV (megaelectronvolts) daughter nuclide | Rn-199 decay mode | β^+ (positron emission) Q-value | 6.753 MeV (megaelectronvolts) daughter nuclide | Fr-203
Radiation shielding
| Ir-170 lead | 26.6 µm water | 74.2 µm air | 67.5 mm
Decay chain
Ir-170
Decay chain Ir-170
Ra-203
Decay chain Ra-203
Mass properties
| Ir-170 | Ra-203 atomic number (Z) | 77 | 88 mass number (A) | 170 | 203 neutron number | 93 | 115 atomic mass | 169.974965 u (unified atomic mass units) | 203.009271619 u (unified atomic mass units) mass excess | -23.32 MeV (megaelectronvolts) | 8.636458 MeV (megaelectronvolts) binding energy per nucleon | 7.854 MeV (megaelectronvolts) | 7.689628 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Ir-170 | Ra-203 spin parity J^π | 3^- (atomic fermion) | 3/2^- (atomic fermion)
Quantum properties