Input interpretation
Al-31 (aluminum-31) | Te-139 (tellurium-139)
Decay properties
| Al-31 | Te-139 half-life | 644 ms (618 to 670.1 ms) | 150 ns (1.49×10^-7 to ∞ s) mean lifetime | 929 ms (0.8923 to 0.9659 s) | 216 ns (2.14×10^-7 to ∞ s) decay constant | 1.08 per second | 4.62×10^6 per second specific activity | 2.09×10^10 TBq/g | 2×10^16 TBq/g width | 7.08×10^-16 eV | 2.11×10^-9 eV decay modes | β^- (electron emission) | β^-n (electron + delayed neutron) | β^- (electron emission) | β^-n (electron + delayed neutron) final decay products | P-31 (100%) | Si-30 (1.6%) | Ba-137 (0) | Ba-138 (0) | La-139 (0)
Decay modes
Al-31
decay mode | β^- (electron emission) branching ratio | 98% Q-value | 7.9954 MeV (megaelectronvolts) daughter nuclide | Si-31 decay mode | β^-n (electron + delayed neutron) branching ratio | 1.6% Q-value | 1.408 MeV (megaelectronvolts) daughter nuclide | Si-30
Te-139
decay mode | β^- (electron emission) Q-value | 8.039 MeV (megaelectronvolts) daughter nuclide | I-139 decay mode | β^-n (electron + delayed neutron) Q-value | 3.461 MeV (megaelectronvolts) daughter nuclide | I-138
Radiation shielding
Radiation shielding
Decay chain
Al-31
Decay chain Al-31
Te-139
Decay chain Te-139
Mass properties
| Al-31 | Te-139 atomic number (Z) | 13 | 52 mass number (A) | 31 | 139 neutron number | 18 | 87 atomic mass | 30.983946619 u (unified atomic mass units) | 138.93473 u (unified atomic mass units) mass excess | -14.953628 MeV (megaelectronvolts) | -60.799 MeV (megaelectronvolts) binding energy per nucleon | 8.225611 MeV (megaelectronvolts) | 8.216 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Te-139 spin parity J^π | 7/2^- (atomic fermion)
Quantum properties