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. Author manuscript; available in PMC: 2012 Apr 6.
Published in final edited form as: Radiat Res. 1997 Mar;147(3):342–348.

TABLE I.

Testicular Dosimetry Calculations and Dose-Weighted RBE

Radionuclide Particle type, energy (MeV)a Branching ratiob nia (yield/decay) sic(Gy/Bq-s) qid RBEie qi × RBEi
223Ra α, 5.288 1 0.0015 1.26 × 10−11 0.000292 6.45 0.00188
223Ra α, 5.340 1 0.0013 1.11 × 10−11 0.000256 6.42 0.00164
223Ra α, 5.366 1 0.0013 1.11 × 10−11 0.000257 6.41 0.00164
223Ra α, 5.433 1 0.0226 1.97 × 10−10 0.00454 6.37 0.0289
223Ra α, 5.502 1 0.0099 8.77 × 10−11 0.00203 6.34 0.0128
223Ra α, 5.540 1 0.0911 8.09 × 10−10 0.0187 6.32 0.118
223Ra α, 5.607 1 0.2407 2.16 × 10−9 0.0499 6.28 0.314
223Ra α, 5.716 1 0.5223 4.78 × 10−9 0.110 6.23 0.688
223Ra α, 5.747 1 0.0945 8.70 × 10−10 0.0201 6.21 0.125
223Ra α, 5.858 1 0.0032 2.98 × 10−11 0.000689 6.16 0.00424
223Ra α, 5.872 1 0.0085 7.95 × 10−11 0.00184 6.15 0.0113
219Rn α, 6.425 1 0.0744 7.66 × 10−10 0.0177 5.87 0.104
219Rn α, 6.531 1 0.0012 1.25 × 10−11 0.000288 5.81 0.00167
219Rn α, 6.553 1 0.1210 1.27 × 10−9 0.0293 5.80 0.170
219Rn α, 6.819 1 0.8025 8.77 × 10−9 0.203 5.67 1.15
215Po α, 7.386 1 0.9994 1.18 × 10−8 0.273 5.38 1.47
211Bi α, 6.279 0.9972 0.1596 1.60 × 10−9 0.0370 5.94 0.220
211Bi α, 6.623 0.9972 0.8377 8.86 × 10−9 0.205 5.77 1.18
211Po α, 6.569 0.0028 0.0054 1.58 × 10−13 0.0000037 5.79 0.0000212
211Po α, 6.891 0.0028 0.0055 1.69 × 10−13 0.0000039 5.63 0.0000219
211Po α, 7.450 0.0028 0.9892 3.31 × 10−11 0.000764 5.34 0.00408
Allf Photons 5.37 × 10−12 0.000124 1.00 0.000124
Allg Conversion e− 1.08 × 10−9 0.0249 1.00 0.0249
Allh Auger e− 1.38 × 10−11 0.000319 1.00i 0.000319
Totals 4.33 × 10−8 1.00 5.63j
a

Energies and yields taken from Eckerman et al. (33).

b

Branching ratios taken from Browne and Firestone (22).

c

Mean absorbed dose per unit cumulated activity (S value) calculated using computer code of Howell et al. (34).

d

qi = fraction of total absorbed dose delivered by the ith radiation.

e

RBE for α particles calculated using Eq. (4).

f

Photon contribution from 223Ra in equilibrium with its daughters.

g

Conversion electron contribution from 223Ra in equilibrium with its daughters.

h

Auger electron contribution from 223Ra in equilibrium with its daughters.

i

Assumes radionuclides are localized outside the cell nucleus (citrate radiochemicals localize in cytoplasm).

j

Weighted RBE for 223Ra in equilibrium with its daughters calculated using R = Σ qi RBEt (5).