Input interpretation
Pr-143 (praseodymium-143)
Decay properties
half-life | 13.57 days (13.51 to 13.63 days) mean lifetime | 19.58 days (19.48 to 19.67 days) decay constant | 5.912×10^-7 per second specific activity | 2491 TBq/g (terabecquerels per gram) width | 2.697×10^-22 eV (electronvolts) decay modes | β^- (electron emission) final decay products | Nd-143 (100%)
Decay mode
decay mode | β^- (electron emission) Q-value | 933.95 keV (kiloelectronvolts) daughter nuclide | Nd-143
Radiation shielding
lead | 640 µm portland concrete | 2.07 mm water | 4.01 mm air | 3.54 m
Decay chain
Decay chain
Mass properties
atomic number (Z) | 59 mass number (A) | 143 neutron number | 84 atomic mass | 142.910816926 u (unified atomic mass units) mass excess | -83.073499 MeV (megaelectronvolts) binding energy per nucleon | 8.329464 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
spin parity J^π | 7/2^+ (atomic boson)
Quantum properties
Excitations
E_level | spin parity J^π | half-life τ_1/2 | width Δ 57.356 keV (kiloelectronvolts) | 5/2^+ | 4.14×10^-9 seconds | 1.1×10^-7 eV (electronvolts) 298 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 350.622 keV (kiloelectronvolts) | 3/2^+ | 5.9×10^-11 seconds | 7.7×10^-6 eV (electronvolts) 490.362 keV (kiloelectronvolts) | 7/2^+ | (unknown) | (unknown) 614.22 keV (kiloelectronvolts) | 5/2^+ or 7/2^+ (uncertain) | (unknown) | (unknown) 721.923 keV (kiloelectronvolts) | 5/2^+ | (unknown) | (unknown) 740.26 keV (kiloelectronvolts) | 1/2^+ | (unknown) | (unknown) 787.33 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 848.42 keV (kiloelectronvolts) | (unknown) | (unknown) | (unknown) 937.82 keV (kiloelectronvolts) | 3/2^+ or 5/2^+ (uncertain) | (unknown) | (unknown)