Input interpretation
![At-212 | daughter nuclides](../image_source/151730e9184ba064a6601b91817927e3.png)
At-212 | daughter nuclides
Result
![Bi-208 | Po-212 | Rn-212](../image_source/64787d64b7b17af2980150f9f87a6ea9.png)
Bi-208 | Po-212 | Rn-212
Decay properties
![| Bi-208 | Po-212 | Rn-212 half-life | 0.368 Myr (0.3635 to 0.3728 Myr) | 299 ns (296.5 to 301.5 ns) | 23.9 min (22.2 to 25.6 min) mean lifetime | 0.533 Myr (0.5252 to 0.5374 Myr) | 431 ns (428.1 to 434.6 ns) | 34.5 min (32 to 36.9 min) decay constant | 5.95×10^-14 per second | 2.32×10^6 per second | 4.83×10^-4 per second specific activity | 172 MBq/g | 6.59×10^15 TBq/g | 1.37×10^6 TBq/g width | 3.93×10^-29 eV | 1.53×10^-9 eV | 2.21×10^-19 eV decay modes | β^+ (positron emission) | α (alpha emission) | α (alpha emission) | 2β^+ (double beta decay) final decay products | Pb-208 (100%) | Pb-208 (100%) | Pb-204 (100%) | Pb-208 (0.00223%) | Hg-200 (0%)](../image_source/62dc4376e1e4fd0326851d517707ea68.png)
| Bi-208 | Po-212 | Rn-212 half-life | 0.368 Myr (0.3635 to 0.3728 Myr) | 299 ns (296.5 to 301.5 ns) | 23.9 min (22.2 to 25.6 min) mean lifetime | 0.533 Myr (0.5252 to 0.5374 Myr) | 431 ns (428.1 to 434.6 ns) | 34.5 min (32 to 36.9 min) decay constant | 5.95×10^-14 per second | 2.32×10^6 per second | 4.83×10^-4 per second specific activity | 172 MBq/g | 6.59×10^15 TBq/g | 1.37×10^6 TBq/g width | 3.93×10^-29 eV | 1.53×10^-9 eV | 2.21×10^-19 eV decay modes | β^+ (positron emission) | α (alpha emission) | α (alpha emission) | 2β^+ (double beta decay) final decay products | Pb-208 (100%) | Pb-208 (100%) | Pb-204 (100%) | Pb-208 (0.00223%) | 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](../image_source/0fe1e965490d9d14a031557acaafd12c.png)
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
Bi-208
![decay mode | β^+ (positron emission) branching ratio | 100% Q-value | 1.85623 MeV (megaelectronvolts) daughter nuclide | Pb-208](../image_source/82dda152fdc76497e611e90b9d025030.png)
decay mode | β^+ (positron emission) branching ratio | 100% Q-value | 1.85623 MeV (megaelectronvolts) daughter nuclide | Pb-208
Po-212
![decay mode | α (alpha emission) branching ratio | 100% Q-value | 8.95412 MeV (megaelectronvolts) daughter nuclide | Pb-208](../image_source/6a0239e3ad7e073a323eac69a3b6c242.png)
decay mode | α (alpha emission) branching ratio | 100% Q-value | 8.95412 MeV (megaelectronvolts) daughter nuclide | Pb-208
Rn-212
![decay mode | α (alpha emission) branching ratio | 100% Q-value | 6.38499 MeV (megaelectronvolts) daughter nuclide | Po-208 decay mode | 2β^+ (double beta decay) Q-value | -334.59 keV (kiloelectronvolts) daughter nuclide | Po-212](../image_source/2513013f6b5b18b6a4a0f72ca755920a.png)
decay mode | α (alpha emission) branching ratio | 100% Q-value | 6.38499 MeV (megaelectronvolts) daughter nuclide | Po-208 decay mode | 2β^+ (double beta decay) Q-value | -334.59 keV (kiloelectronvolts) daughter nuclide | Po-212
Radiation shielding
![| Bi-208 | Po-212 lead | 32.6 µm | 20.6 µm water | 94.2 µm | 54.7 µm air | 85.7 mm | 49.9 mm](../image_source/3713248f3a8f44acb4ef73acd7656074.png)
| Bi-208 | Po-212 lead | 32.6 µm | 20.6 µm water | 94.2 µm | 54.7 µm air | 85.7 mm | 49.9 mm
Decay chain
Bi-208
![Decay chain Bi-208](../image_source/10f6ad4f1cdf74e2c255ac5249da083f.png)
Decay chain Bi-208
Po-212
![Decay chain Po-212](../image_source/7f55facd42f4cc75680a82a58dad65b7.png)
Decay chain Po-212
Rn-212
![Decay chain Rn-212](../image_source/9b0c6e20ca17dc78b666357a51e247d1.png)
Decay chain Rn-212
Mass properties
![| atomic number (Z) | mass number (A) | neutron number Bi-208 | 83 | 208 | 125 Po-212 | 84 | 212 | 128 Rn-212 | 86 | 212 | 126 | atomic mass | mass excess | binding energy per nucleon Bi-208 | 207.979742196 u (unified atomic mass units) | -18.870022 MeV (megaelectronvolts) | 7.849852 MeV (megaelectronvolts) Po-212 | 211.988867969 u (unified atomic mass units) | -10.36942 MeV (megaelectronvolts) | 7.810243 MeV (megaelectronvolts) Rn-212 | 211.990703529 u (unified atomic mass units) | -8.659606 MeV (megaelectronvolts) | 7.794797 MeV (megaelectronvolts)](../image_source/066b97fd9eb2130368d66cbc3d5fdacc.png)
| atomic number (Z) | mass number (A) | neutron number Bi-208 | 83 | 208 | 125 Po-212 | 84 | 212 | 128 Rn-212 | 86 | 212 | 126 | atomic mass | mass excess | binding energy per nucleon Bi-208 | 207.979742196 u (unified atomic mass units) | -18.870022 MeV (megaelectronvolts) | 7.849852 MeV (megaelectronvolts) Po-212 | 211.988867969 u (unified atomic mass units) | -10.36942 MeV (megaelectronvolts) | 7.810243 MeV (megaelectronvolts) Rn-212 | 211.990703529 u (unified atomic mass units) | -8.659606 MeV (megaelectronvolts) | 7.794797 MeV (megaelectronvolts)
![Mass properties](../image_source/bc9fa8c9a06e43a9704e93e6ea26f79f.png)
Mass properties