Input interpretation
Bi-214 (bismuth-214)
Decay properties
half-life | 19.9 minutes (19 to 20.8 min) mean lifetime | 28.7 minutes (27 to 30.3 min) decay constant | 5.81×10^-4 per second specific activity | 1.63×10^6 TBq/g (terabecquerels per gram) width | 2.65×10^-19 eV (electronvolts) decay modes | β^- (electron emission) | α (alpha emission) | β^-α (electron + delayed α) final decay products | Pb-206 (100%) | Tl-205 (1.9×10^-6%)
Decay modes
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 3.2697 MeV (megaelectronvolts) daughter nuclide | Po-214 decay mode | α (alpha emission) branching ratio | 0.021% Q-value | 5.62119 MeV (megaelectronvolts) daughter nuclide | Tl-210 decay mode | β^-α (electron + delayed α) branching ratio | 0.003% Q-value | 11.1032 MeV (megaelectronvolts) daughter nuclide | Pb-210
Radiation shielding
lead | 2.27 mm portland concrete | 8.38 mm water | 16.6 mm air | 14.2 m
Decay chain
Decay chain
Mass properties
atomic number (Z) | 83 mass number (A) | 214 neutron number | 131 atomic mass | 213.998711539 u (unified atomic mass units) mass excess | -1.200193 MeV (megaelectronvolts) binding energy per nucleon | 7.773492 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 1^- (atomic fermion)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 53.2275 keV (kiloelectronvolts) | 2^- | 1×10^-10 seconds | 4.6×10^-6 eV (electronvolts) 62.7 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 103 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 258.87 keV (kiloelectronvolts) | 2^- | (unknown) | (unknown) 295.224 keV (kiloelectronvolts) | 1^- | 5×10^-11 seconds | 9×10^-6 eV (electronvolts) 351.932 keV (kiloelectronvolts) | 0^- or 1^- (uncertain) | 1×10^-10 seconds | 4.6×10^-6 eV (electronvolts) 377.03 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 533.67 keV (kiloelectronvolts) | 1^- | (unknown) | (unknown) 797.24 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 839 keV (kiloelectronvolts) | 1^+ | (unknown) | (unknown) 888 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown)