222 Rn decay; t1/2 = 3.8235 d (t = 5.5161 d).

  1. 222Rn [a (+ g)] 218Po
g + c.e.(a) a
E(b) I(c) (c) Ic.e. E(b) I(c)
511.0 7.3 10-4 2.2 10-5 4987 7.5 10-4
      5490 0.955

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. 222Rn entry in KAERI nuclide chart