Input interpretation
Na-31 (sodium-31)
Decay properties
half-life | 17 ms (milliseconds) (16.4 to 17.6 ms) mean lifetime | 25 ms (milliseconds) (23.8 to 25.3 ms) decay constant | 40 per second specific activity | 7.8×10^11 TBq/g (terabecquerels per gram) width | 2.7×10^-14 eV (electronvolts) decay modes | β^- (electron emission) | β^-n (electron + delayed neutron) | β^-2n (electron + delayed 2 neutrons) | β^-3n (electron + delayed 3 neutrons) final decay products | P-31 (60%) | Si-30 (42%) | Si-29 (0.9%) | Si-28 (0.05%)
Decay modes
decay mode | β^- (electron emission) branching ratio | 62% Q-value | 15.872 MeV (megaelectronvolts) daughter nuclide | Mg-31 decay mode | β^-n (electron + delayed neutron) branching ratio | 37% Q-value | 13.494 MeV (megaelectronvolts) daughter nuclide | Mg-30 decay mode | β^-2n (electron + delayed 2 neutrons) branching ratio | 0.9% Q-value | 7.131 MeV (megaelectronvolts) daughter nuclide | Mg-29 decay mode | β^-3n (electron + delayed 3 neutrons) branching ratio | 0.05% daughter nuclide | Mg-28
Decay chain
Decay chain
Mass properties
atomic number (Z) | 11 mass number (A) | 31 neutron number | 20 atomic mass | 31.013585452 u (unified atomic mass units) mass excess | 12.654768 MeV (megaelectronvolts) binding energy per nucleon | 7.385492 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 3/2^+ (atomic boson) magnetic moment | 2.305 μ_N
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 365 keV (kiloelectronvolts) | 5/2^+ | (unknown) | (unknown)