Input interpretation
Ac-233 | daughter nuclides
Result
Th-233
Decay properties
half-life | 21.83 minutes (21.73 to 21.93 min) mean lifetime | 31.49 minutes (31.31 to 31.68 min) decay constant | 5.292×10^-4 per second specific activity | 1.368×10^6 TBq/g (terabecquerels per gram) width | 2.414×10^-19 eV (electronvolts) decay modes | β^- (electron emission) final decay products | Tl-205 (100%) | Pb-207 (7×10^-12)
Decay mode
decay mode | β^- (electron emission) Q-value | 2.765 MeV (megaelectronvolts) daughter nuclide | Th-233
decay mode | β^- (electron emission) Q-value | 1.24314 MeV (megaelectronvolts) daughter nuclide | Pa-233
Radiation shielding
lead | 880 µm portland concrete | 2.92 mm water | 5.68 mm air | 4.99 m
Decay chain
Decay chain
Mass properties
atomic number (Z) | 90 mass number (A) | 233 neutron number | 143 atomic mass | 233.041581843 u (unified atomic mass units) mass excess | 38.733238 MeV (megaelectronvolts) binding energy per nucleon | 7.602886 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 1/2^+ (atomic fermion)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 6.04 keV (kiloelectronvolts) | 5/2^+ | (unknown) | (unknown) 6.06 keV (kiloelectronvolts) | 7/2^- | (unknown) | (unknown) 16.86 keV (kiloelectronvolts) | 3/2^+ | (unknown) | (unknown) 50.38 keV (kiloelectronvolts) | 7/2^+ | (unknown) | (unknown) 54.546 keV (kiloelectronvolts) | 5/2^+ | (unknown) | (unknown) 93.62 keV (kiloelectronvolts) | 7/2^+ | (unknown) | (unknown) 107.34 keV (kiloelectronvolts) | 9/2^+ | (unknown) | (unknown) 144.1 keV (kiloelectronvolts) | 11/2^- | (unknown) | (unknown) 158 keV (kiloelectronvolts) | 9/2^+ | (unknown) | (unknown) 178 keV (kiloelectronvolts) | 11/2^+ | (unknown) | (unknown)