Input interpretation
![At-216 (astatine-216)](../image_source/7e0193f8eab30fc19788c912f27a515f.png)
At-216 (astatine-216)
Decay properties
![half-life | 300 µs (microseconds) (269.7 to 330.6 µs) mean lifetime | 433 µs (microseconds) (389.1 to 476.5 µs) decay constant | 2310 per second specific activity | 6.44×10^12 TBq/g (terabecquerels per gram) width | 1.52×10^-12 eV (electronvolts) decay modes | α (alpha emission) | β^- (electron emission) | ϵ (electron capture) final decay products | Pb-208 (100%)](../image_source/5b257e60180ed18a77d93fbbd81aeeb9.png)
half-life | 300 µs (microseconds) (269.7 to 330.6 µs) mean lifetime | 433 µs (microseconds) (389.1 to 476.5 µs) decay constant | 2310 per second specific activity | 6.44×10^12 TBq/g (terabecquerels per gram) width | 1.52×10^-12 eV (electronvolts) decay modes | α (alpha emission) | β^- (electron emission) | ϵ (electron capture) final decay products | Pb-208 (100%)
Decay modes
![decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.94963 MeV (megaelectronvolts) daughter nuclide | Bi-212 decay mode | β^- (electron emission) branching ratio | 6×10^-5 Q-value | 2.00168 MeV (megaelectronvolts) daughter nuclide | Rn-216 decay mode | ϵ (electron capture) branching ratio | 3×10^-9 Q-value | 473.41 keV (kiloelectronvolts) daughter nuclide | Po-216](../image_source/93203c07b16bfaac339053dfade66f91.png)
decay mode | α (alpha emission) branching ratio | 100% Q-value | 7.94963 MeV (megaelectronvolts) daughter nuclide | Bi-212 decay mode | β^- (electron emission) branching ratio | 6×10^-5 Q-value | 2.00168 MeV (megaelectronvolts) daughter nuclide | Rn-216 decay mode | ϵ (electron capture) branching ratio | 3×10^-9 Q-value | 473.41 keV (kiloelectronvolts) daughter nuclide | Po-216
Radiation shielding
![lead | 27.6 µm water | 77.6 µm air | 70.6 mm](../image_source/3ffcb3df1c4e5bdaa004af354bf5d442.png)
lead | 27.6 µm water | 77.6 µm air | 70.6 mm
Decay chain
![Decay chain](../image_source/5e300aa36c840cb3a604b6cefe2af1e2.png)
Decay chain
Mass properties
![atomic number (Z) | 85 mass number (A) | 216 neutron number | 131 atomic mass | 216.002423257 u (unified atomic mass units) mass excess | 2.25725 MeV (megaelectronvolts) binding energy per nucleon | 7.752999 MeV (megaelectronvolts)](../image_source/063820a7baaf6a4543f1abb877eb6464.png)
atomic number (Z) | 85 mass number (A) | 216 neutron number | 131 atomic mass | 216.002423257 u (unified atomic mass units) mass excess | 2.25725 MeV (megaelectronvolts) binding energy per nucleon | 7.752999 MeV (megaelectronvolts)
![Mass properties](../image_source/aaf3b1156481542556362ba184fea908.png)
Mass properties
Nearby isotopes
![Nearby isotopes](../image_source/04e38146dafb37d55f6112d61dd7c95f.png)
Nearby isotopes
Quantum properties
![spin parity J^π | 1^- (atomic fermion)](../image_source/8b31746b9fcd119f9689b0ffb79c7723.png)
spin parity J^π | 1^- (atomic fermion)
![Quantum properties](../image_source/adfdfaff852ecf6095d990c0dd67623a.png)
Quantum properties
Excitations
![E_level | spin parity J^π | half-life τ_1/2 | width Δ 44.59 keV (kiloelectronvolts) | 2^- | (unknown) | (unknown) 57.11 keV (kiloelectronvolts) | 4^- | (unknown) | (unknown) 105.89 keV (kiloelectronvolts) | 0^- | (unknown) | (unknown) 122 keV (kiloelectronvolts) | 5^- | (unknown) | (unknown) 153.4 keV (kiloelectronvolts) | 2^- | (unknown) | (unknown) 160.73 keV (kiloelectronvolts) | 1^- | (unknown) | (unknown) 169.3 keV (kiloelectronvolts) | 3^- | (unknown) | (unknown) 199.2 keV (kiloelectronvolts) | 3^- | (unknown) | (unknown) 208 keV (kiloelectronvolts) | 1^- or 2^- (uncertain) | (unknown) | (unknown) 234.6 keV (kiloelectronvolts) | 1^- or 2^- (uncertain) | (unknown) | (unknown)](../image_source/3b380f79d5376f35864d3360aa21c75f.png)
E_level | spin parity J^π | half-life τ_1/2 | width Δ 44.59 keV (kiloelectronvolts) | 2^- | (unknown) | (unknown) 57.11 keV (kiloelectronvolts) | 4^- | (unknown) | (unknown) 105.89 keV (kiloelectronvolts) | 0^- | (unknown) | (unknown) 122 keV (kiloelectronvolts) | 5^- | (unknown) | (unknown) 153.4 keV (kiloelectronvolts) | 2^- | (unknown) | (unknown) 160.73 keV (kiloelectronvolts) | 1^- | (unknown) | (unknown) 169.3 keV (kiloelectronvolts) | 3^- | (unknown) | (unknown) 199.2 keV (kiloelectronvolts) | 3^- | (unknown) | (unknown) 208 keV (kiloelectronvolts) | 1^- or 2^- (uncertain) | (unknown) | (unknown) 234.6 keV (kiloelectronvolts) | 1^- or 2^- (uncertain) | (unknown) | (unknown)