Input interpretation
Ac-227 (actinium-227) | Sr-102 (strontium-102)
Decay properties
| Ac-227 | Sr-102 half-life | 21.772 yr (21.764 to 21.78 yr) | 69 ms (55 to 83 ms) mean lifetime | 31.41 yr (31.398 to 31.423 yr) | 100 ms (89.9 to 109 ms) decay constant | 1.0095×10^-9 per second | 10 per second specific activity | 2.6779 TBq/g | 5.9×10^10 TBq/g width | 4.6055×10^-25 eV | 6.6×10^-15 eV decay modes | β^- (electron emission) | α (alpha emission) | β^- (electron emission) | β^-n (electron + delayed neutron) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Ru-102 (90%) | Ru-101 (10%) | Ru-100 (0.11%)
Decay modes
Ac-227
decay mode | β^- (electron emission) branching ratio | 98.62% Q-value | 44.765 keV (kiloelectronvolts) daughter nuclide | Th-227 decay mode | α (alpha emission) branching ratio | 1.38% Q-value | 5.04219 MeV (megaelectronvolts) daughter nuclide | Fr-223
Sr-102
decay mode | β^- (electron emission) branching ratio | 94% Q-value | 8.815 MeV (megaelectronvolts) daughter nuclide | Y-102 decay mode | β^-n (electron + delayed neutron) branching ratio | 5.5% Q-value | 3.763 MeV (megaelectronvolts) daughter nuclide | Y-101
Radiation shielding
| Ac-227 lead | 7.48 µm portland concrete | 19 µm water | 35.6 µm air | 31.7 mm
Decay chain
Ac-227
Decay chain Ac-227
Sr-102
Decay chain Sr-102
Mass properties
| Ac-227 | Sr-102 atomic number (Z) | 89 | 38 mass number (A) | 227 | 102 neutron number | 138 | 64 atomic mass | 227.027752127 u (unified atomic mass units) | 101.943018987 u (unified atomic mass units) mass excess | 25.850941 MeV (megaelectronvolts) | -53.077471 MeV (megaelectronvolts) binding energy per nucleon | 7.650701 MeV (megaelectronvolts) | 8.300222 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| Ac-227 | Sr-102 spin parity J^π | 3/2^- (atomic boson) | 0^+ (atomic boson) magnetic moment | 1.1 μ_N | 0 μ_N electric quadrupole moment | 1.7 eb (electron barns) | (unknown)
Quantum properties