230 Th decay; t1/2 = 75.4 ky (t = 108.8 ky).

  1. 230Th [a (+ g)] 226Ra
g + c.e.(a) a
E(b) I(c) (c) Ic.e. E(b) I(c)
620.0 7.6 10-9 5.9 10-11 3829 1.3 10-8
552.0 5.2 10-9   "  
570.0 3.2 10-8 2.9 10-10 3878 3.3 10-8
235.0 8.0 10-8 5.0 10-9 4248 8.5 10-8
205.0 4.9 10-8 2.7 10-8 4278 7.6 10-8
254.0 8.1 10-6 4.2 10-7 4372 9.3 10-6
110.0 5.7 10-7 2.2 10-7 "  
254.0 1.1 10-4 5.5 10-6 4438 2.9 10-4
186.0 8.4 10-5 9.1 10-6 "  
144.0 7.5 10-4 0.0016 4480 0.0011
67.7 0.0044 0.274 4621 0.224
      4688 0.729

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. 230Th entry in KAERI nuclide chart