Input interpretation
Al-31 (aluminum-31) | Pb-211 (lead-211)
Decay properties
| Al-31 | Pb-211 half-life | 644 ms (618 to 670.1 ms) | 36.17 min (35.87 to 36.33 min) mean lifetime | 929 ms (0.8923 to 0.9659 s) | 52 min (51.75 to 52.42 min) decay constant | 1.08 per second | 3.205×10^-4 per second specific activity | 2.09×10^10 TBq/g | 914800 TBq/g width | 7.08×10^-16 eV | 2.11×10^-19 eV decay modes | β^- (electron emission) | β^-n (electron + delayed neutron) | β^- (electron emission) final decay products | P-31 (100%) | Si-30 (1.6%) | Pb-207 (100%)
Decay modes
Al-31
decay mode | β^- (electron emission) branching ratio | 98% Q-value | 7.9954 MeV (megaelectronvolts) daughter nuclide | Si-31 decay mode | β^-n (electron + delayed neutron) branching ratio | 1.6% Q-value | 1.408 MeV (megaelectronvolts) daughter nuclide | Si-30
Pb-211
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 1.36697 MeV (megaelectronvolts) daughter nuclide | Bi-211
Radiation shielding
| Al-31 lead | 0.975 mm portland concrete | 3.26 mm water | 6.35 mm air | 5.57 m
Decay chain
Al-31
Decay chain Al-31
Pb-211
Decay chain Pb-211
Mass properties
| Al-31 | Pb-211 atomic number (Z) | 13 | 82 mass number (A) | 31 | 211 neutron number | 18 | 129 atomic mass | 30.983946619 u (unified atomic mass units) | 210.988736964 u (unified atomic mass units) mass excess | -14.953628 MeV (megaelectronvolts) | -10.49145 MeV (megaelectronvolts) binding energy per nucleon | 8.225611 MeV (megaelectronvolts) | 7.817 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Pb-211 spin parity J^π | 9/2^+ (atomic fermion) magnetic moment | -1.4037 μ_N electric quadrupole moment | 0.087 eb (electron barns)
Quantum properties