210 Pb decay; t1/2 = 22.3 y (t = 32.2 y).

  1. 210Pb [b (+ g)] 210Bi   (~ 100%)
  2. 210Pb [a (no g)] 206Hg   (1.9 10-6%;   t1/2 = 1.2 Gy)
g + c.e.(a) a b
E(b) I(c) (c) Ic.e. E(b) I(c) E(b) I(c)
46.5 0.039 0.726     17.0 0.765
          63.0 0.191
      3720 1.8 10-8    
206Hg decay:
650.0 4.1 10-10       664.0 5.5 10-10
344.0 1.0 10-10       "  
305.0 4.9 10-9 1.9 10-9     935.0 6.6 10-9
          1313 1.1 10-8

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. 210Pb and 206Hg entries in KAERI nuclide chart