228 Th decay; t1/2 = 1.9131 y (t = 2.7600 y).

  1. 228Th [a (+ g)] 224Ra
g + c.e.(a) a
E(b) I(c) (c) Ic.e. E(b) I(c)
206.0 2.0 10-4 1.7 10-5 5138 3.9 10-4
74.4 4.2 10-6 1.7 10-4 "  
166.0 0.0011 0.0013 5173 0.0024
216.0 0.0026 2.0 10-4 5211 0.0044
132.0 0.0014 3.6 10-4 "  
84.4 0.013 0.273 5340 0.282
      5423 0.711

Notes:

  1. c.e.: conversion electrons
  2. Energies in keV
  3. Intensities per `parent' decay of Th
  4. Data from compilations and amendments in Nuclear Data Sheets to Vol. 64 (1991)
  5. 228Th entry in KAERI nuclide chart