Input interpretation
Ge-59 (germanium-59) | Pr-138 (praseodymium-138)
Decay properties
| Ge-59 | Pr-138 half-life | (unknown) | 87 s (83.1 to 97 s) mean lifetime | (unknown) | 126 s (121.1 to 129.9 s) decay constant | | 0.00794 per second specific activity | | 3.47×10^7 TBq/g width | (unknown) | 5.24×10^-18 eV decay modes | 2p (two-proton emission) | β^+ (positron emission) final decay products | Fe-56 (0) | Fe-57 (0) | Ce-138 (100%) | Ba-138 (0)
Decay modes
Ge-59
decay mode | 2p (two-proton emission) Q-value | 1.222 MeV (megaelectronvolts) daughter nuclide | Zn-57
Pr-138
decay mode | β^+ (positron emission) branching ratio | 100% Q-value | 3.4148 MeV (megaelectronvolts) daughter nuclide | Ce-138
Radiation shielding
Radiation shielding
Decay chain
Ge-59
Decay chain Ge-59
Pr-138
Decay chain Pr-138
Mass properties
| Ge-59 | Pr-138 atomic number (Z) | 32 | 59 mass number (A) | 59 | 138 neutron number | 27 | 79 atomic mass | 58.98175 u (unified atomic mass units) | 137.910754636 u (unified atomic mass units) mass excess | -17 MeV (megaelectronvolts) | -83.131521 MeV (megaelectronvolts) binding energy per nucleon | 7.935 MeV (megaelectronvolts) | 8.339238 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Ge-59 | Pr-138 spin parity J^π | 7/2^- (atomic fermion) | 1^+ (atomic fermion)
Quantum properties