Input interpretation
Th-232 (thorium-232)
Natural abundance
100%
Decay properties
half-life | 14 Gyr (gigayears) (-18 to 40 Gyr) mean lifetime | 20.2 Gyr (gigayears) (-30 to 90 Gyr) decay constant | 1.57×10^-18 per second specific activity | 4.07 kBq/g (kilobecquerels per gram) width | 7.16×10^-34 eV (electronvolts) decay modes | α (alpha emission) | SF (spontaneous fission) | ^24Ne +^26Ne (double cluster emission) | 2β^- (double beta decay) final decay products | Pb-208 (100%) | Pb-206 (4×10^-11) | Pb-204 (0) | Hg-200 (0) | Hg-204 (0)
Decay modes
decay mode | α (alpha emission) branching ratio | 100% Q-value | 4.0816 MeV (megaelectronvolts) daughter nuclide | Ra-228 decay mode | SF (spontaneous fission) branching ratio | 1.1×10^-11 decay mode | ^24Ne +^26Ne (double cluster emission) branching ratio | 2.78×10^-12 daughter nuclide | Yb-182 decay mode | 2β^- (double beta decay) Q-value | 837.57 keV (kiloelectronvolts) daughter nuclide | U-232
Radiation shielding
lead | 11.7 µm water | 27.9 µm air | 25.4 mm
Decay chain
Decay chain
Mass properties
atomic number (Z) | 90 mass number (A) | 232 neutron number | 142 atomic mass | 232.038055325 u (unified atomic mass units) mass excess | 35.448307 MeV (megaelectronvolts) binding energy per nucleon | 7.615026 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 0^+ (atomic boson) magnetic moment | 0 μ_N
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 49.369 keV (kiloelectronvolts) | 2^+ | 3.45×10^-10 seconds | 1.32×10^-6 eV (electronvolts) 162.12 keV (kiloelectronvolts) | 4^+ | 1.64×10^-10 seconds | 2.78×10^-6 eV (electronvolts) 333.26 keV (kiloelectronvolts) | 6^+ | 6.2×10^-11 seconds | 7.4×10^-6 eV (electronvolts) 556.9 keV (kiloelectronvolts) | 8^+ | 2.4×10^-11 seconds | 1.9×10^-5 eV (electronvolts) 714.42 keV (kiloelectronvolts) | 1^- | (unknown) | (unknown) 730.6 keV (kiloelectronvolts) | 0^+ | (unknown) | (unknown) 774.15 keV (kiloelectronvolts) | 2^+ | 6×10^-12 seconds | 8×10^-5 eV (electronvolts) 774.43 keV (kiloelectronvolts) | 3^- | (unknown) | (unknown) 785.25 keV (kiloelectronvolts) | 2^+ | 2.3×10^-12 seconds | 2×10^-4 eV (electronvolts) 826.8 keV (kiloelectronvolts) | 10^+ | 1.03×10^-11 seconds | 4.43×10^-5 eV (electronvolts)