Input interpretation
B-19 (boron-19) | Tl-210 (thallium-210)
Decay properties
| B-19 | Tl-210 half-life | 2.92 ms (2.786 to 3.054 ms) | 78 s (75.2 to 80.8 s) mean lifetime | 4.21 ms (4.022 to 4.403 ms) | 110 s (110 to 115 s) decay constant | 238 per second | 0.00909 per second specific activity | 7.5×10^12 TBq/g | 2.61×10^7 TBq/g width | 1.56×10^-13 eV | 5.8×10^-18 eV decay modes | β^-n (electron + delayed neutron) | β^-2n (electron + delayed 2 neutrons) | β^- (electron emission) | β^-n (electron + delayed neutron) final decay products | O-16 (50%) | O-18 (40%) | O-17 (8%) | N-14 (6%) | C-13 (0.001%) | C-12 (7.1×10^-5%) | Pb-206 (100%) | Tl-205 (0.009%)
Decay modes
B-19
decay mode | β^-n (electron + delayed neutron) branching ratio | 75% Q-value | 26.367 MeV (megaelectronvolts) daughter nuclide | C-18 decay mode | β^-2n (electron + delayed 2 neutrons) branching ratio | 25% Q-value | 22.183 MeV (megaelectronvolts) daughter nuclide | C-17
Tl-210
decay mode | β^- (electron emission) branching ratio | 100% Q-value | 5.482 MeV (megaelectronvolts) daughter nuclide | Pb-210 decay mode | β^-n (electron + delayed neutron) branching ratio | 0.009% Q-value | 296.8 keV (kiloelectronvolts) daughter nuclide | Pb-209
Radiation shielding
| B-19 lead | 3.48 mm portland concrete | 14 mm water | 27.9 mm air | 23.4 m
Decay chain
B-19
Decay chain B-19
Tl-210
Decay chain Tl-210
Mass properties
| B-19 | Tl-210 atomic number (Z) | 5 | 81 mass number (A) | 19 | 210 neutron number | 14 | 129 atomic mass | 19.06373 u (unified atomic mass units) | 209.990073689 u (unified atomic mass units) mass excess | 59.364 MeV (megaelectronvolts) | -9.246298 MeV (megaelectronvolts) binding energy per nucleon | 4.741 MeV (megaelectronvolts) | 7.813585 MeV (megaelectronvolts)
Mass properties
Nearby isotopes
Nearby isotopes
Quantum properties
| B-19 | Tl-210 spin parity J^π | 3/2^- (atomic boson) | 5^+ (atomic fermion)
Quantum properties