Input interpretation
At-212 (astatine-212) | Yb-153 (ytterbium-153)
Decay properties
| At-212 | Yb-153 half-life | 314 ms (311.4 to 316.6 ms) | 4.2 s (3.94 to 4.46 s) mean lifetime | 453 ms (420 to 456.2 ms) | 6.1 s (5.73 to 6.39 s) decay constant | 2.21 per second | 0.16 per second specific activity | 6.27×10^9 TBq/g | 6.5×10^8 TBq/g width | 1.45×10^-15 eV | 1.1×10^-16 eV decay modes | α (alpha emission) | β^+ (positron emission) | β^- (electron emission) | α (alpha emission) | β^+ (positron emission) | β^+p (positron + delayed proton) final decay products | Pb-208 (100%) | Pb-204 (2×10^-6%) | Hg-200 (0%) | Sm-149 (39%) | Nd-145 (8%) | Sm-144 (3.5%) | Ce-140 (7×10^-4%) | Pr-141 (2×10^-8%) | Eu-153 (0%) | Sm-152 (0%)
Decay modes
At-212
decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.82392 MeV (megaelectronvolts) daughter nuclide | Bi-208 decay mode | β^+ (positron emission) branching ratio | 0.03% Q-value | 726.03 keV (kiloelectronvolts) daughter nuclide | Po-212 decay mode | β^- (electron emission) branching ratio | 2×10^-6% Q-value | 38.42 keV (kiloelectronvolts) daughter nuclide | Rn-212
Yb-153
decay mode | α (alpha emission) branching ratio | 50% Q-value | 4.258 MeV (megaelectronvolts) daughter nuclide | Er-149 decay mode | β^+ (positron emission) daughter nuclide | Tm-153 decay mode | β^+p (positron + delayed proton) branching ratio | 0.008% daughter nuclide | Er-152
Radiation shielding
| At-212 lead | 27 µm water | 75.6 µm air | 68.8 mm
Decay chain
At-212
Decay chain At-212
Yb-153
Decay chain Yb-153
Mass properties
| At-212 | Yb-153 atomic number (Z) | 85 | 70 mass number (A) | 212 | 153 neutron number | 127 | 83 atomic mass | 211.990744771 u (unified atomic mass units) | 152.94948 u (unified atomic mass units) mass excess | -8.62119 MeV (megaelectronvolts) | -47.059 MeV (megaelectronvolts) binding energy per nucleon | 7.798306 MeV (megaelectronvolts) | 8.021 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| At-212 | Yb-153 spin parity J^π | 1^- (atomic fermion) | 7/2^- (atomic fermion)
Quantum properties