Input interpretation
Cs-114 (cesium-114) | At-197 (astatine-197)
Decay properties
| Cs-114 | At-197 half-life | 570 ms (549.4 to 590.6 ms) | 388 ms (376 to 400 ms) mean lifetime | 822 ms (792.7 to 852 ms) | 559.8 ms (542 to 578 ms) decay constant | 1.22 per second | 1.786 per second specific activity | 6.43×10^9 TBq/g | 5.461×10^9 TBq/g width | 8×10^-16 eV | 8.15×10^-16 eV decay modes | β^+ (positron emission) | β^+p (positron + delayed proton) | β^+α (positron + delayed α) | α (alpha emission) | α (alpha emission) | β^+ (positron emission) final decay products | Sn-114 (90%) | In-113 (9%) | Cd-110 (0.2%) | Cd-106 (0.0033%) | Ag-109 (0.002%) | Pd-106 (0%) | Os-189 (3.4%) | Au-197 (2.2%) | Ir-193 (2×10^-6%) | Re-185 (2×10^-6%) | Ta-181 (5×10^-11%)
Decay modes
Cs-114
decay mode | β^+ (positron emission) branching ratio | 91% Q-value | 11.525 MeV (megaelectronvolts) daughter nuclide | Xe-114 decay mode | β^+p (positron + delayed proton) branching ratio | 8.7% daughter nuclide | I-113 decay mode | β^+α (positron + delayed α) branching ratio | 0.19% daughter nuclide | Te-110 decay mode | α (alpha emission) branching ratio | 0.018% Q-value | 3.357 MeV (megaelectronvolts) daughter nuclide | I-110
At-197
decay mode | α (alpha emission) branching ratio | 96% Q-value | 7.1038 MeV (megaelectronvolts) daughter nuclide | Bi-193 decay mode | β^+ (positron emission) branching ratio | 4% Q-value | 5.9916 MeV (megaelectronvolts) daughter nuclide | Po-197
Radiation shielding
Radiation shielding
Decay chain
Cs-114
Decay chain Cs-114
At-197
Decay chain At-197
Mass properties
| Cs-114 | At-197 atomic number (Z) | 55 | 85 mass number (A) | 114 | 197 neutron number | 59 | 112 atomic mass | 113.94145 u (unified atomic mass units) | 196.993189215 u (unified atomic mass units) mass excess | -54.539 MeV (megaelectronvolts) | -6.344205 MeV (megaelectronvolts) binding energy per nucleon | 8.172 MeV (megaelectronvolts) | 7.76596 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Cs-114 | At-197 spin parity J^π | 1^+ (atomic fermion) | 9/2^- (atomic boson)
Quantum properties