Input interpretation
At-212 | decay modes
Result
α (alpha emission) | β^+ (positron emission) | β^- (electron emission)
Decay properties
half-life | 314 ms (milliseconds) (311.4 to 316.6 ms) mean lifetime | 453 ms (milliseconds) (420 to 456.2 ms) decay constant | 2.21 per second specific activity | 6.27×10^9 TBq/g (terabecquerels per gram) width | 1.45×10^-15 eV (electronvolts) decay modes | α (alpha emission) | β^+ (positron emission) | β^- (electron emission) final decay products | Pb-208 (100%) | Pb-204 (2×10^-6%) | Hg-200 (0%)
Decay modes
decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.82392 MeV (megaelectronvolts) daughter nuclide | Bi-208 decay mode | β^+ (positron emission) branching ratio | 0.03% Q-value | 726.03 keV (kiloelectronvolts) daughter nuclide | Po-212 decay mode | β^- (electron emission) branching ratio | 2×10^-6% Q-value | 38.42 keV (kiloelectronvolts) daughter nuclide | Rn-212