Input interpretation
Ac-206 | daughter nuclides
Result
Fr-202 | Ra-206
Decay properties
| Fr-202 | Ra-206 half-life | 300 ms (200 to 400 ms) | 240 ms (219.7 to 260.3 ms) mean lifetime | 433 ms (280 to 580 ms) | 346 ms (317 to 375.4 ms) decay constant | 2.31 per second | 2.89 per second specific activity | 6.89×10^9 TBq/g | 8.45×10^9 TBq/g width | 1.05×10^-15 eV | 1.9×10^-15 eV decay modes | α (alpha emission) | β^+ (positron emission) | α (alpha emission) final decay products | Pt-194 (90%) | Hg-198 (1%) | W-182 (0.4%) | Hg-202 (0.3%) | Hf-178 (0%) | Os-190 (0%) | Pt-194 (50%) | Hg-198 (40%) | Hg-202 (11%) | W-182 (4×10^-6%) | Hf-178 (0%) | Os-190 (0%)
Decay modes
decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.9446 MeV (megaelectronvolts) daughter nuclide | Fr-202 decay mode | β^+ (positron emission) branching ratio | 0.2% Q-value | 8.924 MeV (megaelectronvolts) daughter nuclide | Ra-206
Fr-202
decay mode | α (alpha emission) branching ratio | 97% Q-value | 7.38897 MeV (megaelectronvolts) daughter nuclide | At-198 decay mode | β^+ (positron emission) branching ratio | 3% Q-value | 8.3946 MeV (megaelectronvolts) daughter nuclide | Rn-202
Ra-206
decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.41518 MeV (megaelectronvolts) daughter nuclide | Rn-202
Radiation shielding
| Fr-202 lead | 25.1 µm water | 69.4 µm air | 63.2 mm
Decay chain
Fr-202
Decay chain Fr-202
Ra-206
Decay chain Ra-206
Mass properties
| Fr-202 | Ra-206 atomic number (Z) | 87 | 88 mass number (A) | 202 | 206 neutron number | 115 | 118 atomic mass | 202.003372847 u (unified atomic mass units) | 206.00382727 u (unified atomic mass units) mass excess | 3.141787 MeV (megaelectronvolts) | 3.565079 MeV (megaelectronvolts) binding energy per nucleon | 7.718812 MeV (megaelectronvolts) | 7.719805 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Fr-202 | Ra-206 spin parity J^π | 3^+ (atomic fermion) | 0^+ (atomic boson) magnetic moment | (unknown) | 0 μ_N
Quantum properties