223 Ra decay; t1/2 = 11.43 d (t = 16.49 d).

  1. 223Ra [a (+ g)] 219Rn
g + c.e.(a) a
E(b) I(c) (c) Ic.e. E(b) I(c)
338.0 0.0012 5.6 10-4 5540 0.0040
334.0 4.4 10-5 5.8 10-6 "  
324.0 0.0017 8.5 10-4 "  
180.0 6.7 10-5 1.4 10-4 "  
269.0 0.0060 0.0050 5607 0.011
255.0 1.4 10-5 6.9 10-7 "  
111.0 2.1 10-5 1.2 10-4 "  
159.0 3.0 10-4 0.0011 5716 0.023
154.0 0.0025 0.0099 "  
144.0 0.0014 0.0069 "  
31.6 4.4 10-8 9.4 10-5 "  
122.0 5.2 10-4 0.0040 5747 0.0042
14.4 1.3 10-5 0.0067 5858 1.4 10-4
10.0 3.5 10-6 0.0045 "  
4.4 1.9 10-6 0.022 5865 8.8 10-6
      5872 3.7 10-4

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);
    20 a-decays and 2 other levels  (and 45 associated gs) with yields < 0.1% omitted - full details here
  5. g and conversion electron intensities are totals from given level; part may be associated with different (lower energy) primaries
  6. 223Ra entry in KAERI nuclide chart