226 Ra decay; t1/2 = 1600 y (t = 2308 y).

  1. 226Ra [a (+ g)] 222Rn
g + c.e.(a) a
E(b) I(c) (c) Ic.e. E(b) I(c)
449.0 1.8 10-6 2.5 10-8 4160 2.6 10-6
415.0 2.9 10-6 4.7 10-8 4191 9.6 10-6
601.0 4.7 10-6 3.6 10-8 "  
262.0 4.7 10-5 10-5 4340 6.2 10-5
186.0 0.035 0.025 4602 0.053
      4784 0.903

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. 226Ra entry in KAERI nuclide chart