227 Th decay; t1/2 = 18.72 d (t = 27.01 d).

  1. 227Th [a (+ g)] 223Ra
g + c.e.(a) a
E(b) I(c) (c) Ic.e. E(b) I(c)
342.0 1.5 10-4 5.1 10-5 5701 0.0016
313.0 2.1 10-4 1.4 10-4 "  
292.0 2.6 10-5 9.8 10-7 "  
281.0 6.9 10-5 5.2 10-5 "  
263.0 1.6 10-6 7.9 10-8 "  
219.0 1.7 10-5 1.3 10-6 "  
213.0 3.0 10-5 5.9 10-5 "  
168.0 6.1 10-6 7.0 10-6 "  
108.0 3.0 10-6 3.6 10-5 "  
62.7 3.9 10-6 6.8 10-5 "  
56.6 3.0 10-6 1.4 10-4 "  
8.1 2.0 10-5 4.8 10-4 "  
334.0 4.3 10-4 2.0 10-4 5709 0.0036
304.0 4.6 10-4 3.1 10-4 "  
284.0 2.2 10-5 8.7 10-7 "  
273.0 2.1 10-4 5.0 10-5 "  
255.0 3.5 10-4 1.8 10-5 "  
211.0 4.9 10-4 3.9 10-5 "  
204.0 1.0 10-4 5.6 10-5 "  
99.7 5.6 10-6 1.9 10-5 "  
54.2 3.5 10-6 6.8 10-5 "  
48.3 4.3 10-6 0.0014 "  
330.0 0.0012 3.4 10-5 5713 0.0021
300.0 8.7 10-4 3.1 10-5 "  
280.0 3.0 10-5 2.7 10-5 "  
250.0 1.6 10-4 8.4 10-5 "  
206.0 1.0 10-4 5.4 10-5 "  
43.8 1.0 10-4 1.0 10-4 "  
286.0 6.9 10-4 4.3 10-4 5757 0.0088
256.0 0.0030 7.6 10-4 "  
236.0 0.0049 3.4 10-4 "  
225.0 6.5 10-6 4.7 10-7 "  
206.0 5.2 10-6 4.5 10-7 "  
51.2 1.3 10-6 3.0 10-5 "  
124.0 2.2 10-6 8.4 10-6 5867 0.0011
113.0 3.2 10-4 4.7 10-4 "  
95.0 5.2 10-6 6.5 10-5 "  
69.8 3.9 10-6 1.1 10-6 "  
50.9 6.9 10-6 4.5 10-4 "  
44.4 5.6 10-6 2.0 10-4 "  
94.0 6.1 10-4 8.0 10-5 5916 3.4 10-4
73.7 8.2 10-6 1.8 10-4 "  
62.5 1.0 10-4 4.1 10-5 "  
44.1 3.0 10-6 3.9 10-4 "  
79.8 9.1 10-4 1.8 10-4 5960 0.0013
49.9 8.7 10-5 2.4 10-4 "  
29.6 2.6 10-6 3.1 10-4 "  
61.5 3.5 10-5 0.0034 5978 0.010
31.6 3.5 10-5 0.0091 "  
50.2 0.0036 0.0025 5989 8.7 10-7
20.3 9.1 10-5 7.0 10-4 "  
29.9 4.3 10-5 0.016 6009 0.0013
      6038 0.011

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);
    35 a-decays and 1 other level  (and 162 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. 227Th entry in KAERI nuclide chart