218At decay; t1/2 = 1.6 s (t = 2.3 s).

  1. 218At [a (+ g)] 214Bi   (99.9%)
  2. 218At [b (no g)] 218Rn   (0.1%;   t1/2 = 1600 s)
g + c.e.(a) a b
E(b) I(c) (c) Ic.e. E(b) I(c) E(b) I(c)
95.0 8.0 × 10-6 4.1 × 10-6 6653 1.2 × 10-5    
53.2 1.2 × 10-5 1.6 × 10-4 6694 1.7 × 10-4    
      6746 6.8 × 10-6    
          2891 1.9 × 10-7
218Rn decay:
609.0 2.4 × 10-10   6535 2.4 × 10-10    
      7133 1.9 × 10-7    

Notes:

  1. c.e.: conversion electrons
  2. Energies in keV
  3. Intensities per `parent' decay of natural U (i.e. 0.956 238U, 0.044 235U)
  4. Data from compilations and amendments in Nuclear Data Sheets to Vol. 64 (1991)
  5. g and conversion electron intensities are totals from given level; part may be associated with different (lower energy) primaries
  6. 218At and 218Rn entries in KAERI nuclide chart