Input interpretation
Sb-137 (antimony-137) | Rh-117 (rhodium-117)
Decay properties
| Sb-137 | Rh-117 half-life | 450 ms (399.4 to 500.6 ms) | 440 ms (399.4 to 480.6 ms) mean lifetime | 649 ms (576.6 to 722.1 ms) | 635 ms (576.6 to 693.3 ms) decay constant | 1.54 per second | 1.57 per second specific activity | 6.78×10^9 TBq/g | 8.11×10^9 TBq/g width | 1.01×10^-15 eV | 1.04×10^-15 eV decay modes | β^- (electron emission) | β^-n (electron + delayed neutron) | β^- (electron emission) final decay products | Xe-136 (50%) | Ba-137 (50%) | Ba-135 (0.64%) | Ba-136 (0) | Sn-117 (100%)
Decay modes
Sb-137
decay mode | β^- (electron emission) branching ratio | 51% Q-value | 9.303 MeV (megaelectronvolts) daughter nuclide | Te-137 decay mode | β^-n (electron + delayed neutron) branching ratio | 49% Q-value | 6.096 MeV (megaelectronvolts) daughter nuclide | Te-136
Rh-117
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 7.581 MeV (megaelectronvolts) daughter nuclide | Pd-117
Radiation shielding
| Sb-137 lead | 4.45 mm portland concrete | 19 mm water | 38.3 mm air | 31.7 m
Decay chain
Sb-137
Decay chain Sb-137
Rh-117
Decay chain Rh-117
Mass properties
| Sb-137 | Rh-117 atomic number (Z) | 51 | 45 mass number (A) | 137 | 117 neutron number | 86 | 72 atomic mass | 136.93531 u (unified atomic mass units) | 116.92598 u (unified atomic mass units) mass excess | -60.258 MeV (megaelectronvolts) | -68.949 MeV (megaelectronvolts) binding energy per nucleon | 8.22 MeV (megaelectronvolts) | 8.36 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Sb-137 | Rh-117 spin parity J^π | 7/2^+ (atomic boson) | 7/2^+ (atomic boson)
Quantum properties