Input interpretation
As-75 (arsenic-75) | La-139 (lanthanum-139)
Natural abundance
As-75 | La-139 100% | 99.91%
Radiation shielding
Radiation shielding
Mass properties
| As-75 | La-139 atomic number (Z) | 33 | 57 mass number (A) | 75 | 139 neutron number | 42 | 82 atomic mass | 74.921596478 u (unified atomic mass units) | 138.906353267 u (unified atomic mass units) mass excess | -73.03241 MeV (megaelectronvolts) | -87.231371 MeV (megaelectronvolts) binding energy per nucleon | 8.70085 MeV (megaelectronvolts) | 8.378063 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| As-75 | La-139 spin parity J^π | 3/2^- (atomic boson) | 7/2^+ (atomic boson) magnetic moment | 1.43947 μ_N | 2.7830455 μ_N electric quadrupole moment | 0.314 eb (electron barns) | 0.2 eb (electron barns)
Quantum properties