_
ree bebee ae
fat ES ene oan ar Snead aietame 6 mem FL ei oy eee: *
amen
Appendix 9 (continued)
C.
Data on Principle Isotopes of Iodine Contributing to Thyroid Dose
(From "Inhalation of Radfotodine from Fallout:
Hazards and Countermeasures" by R. Cole 7)
.
Mey
max’ ’
Relative
abundance, &
Range in
tissue, um
50%-Dose
Tadius," tm
lodine-131 Betas
5.246
0.332
0.606
0.807
2.2
10.6
1,006
86.4
0.8
150
2,100
310
2,500
3,900
§,400
8,400
11,900
375
625
920
1,500
2,400
6,800
1,200
8,100
15,800
1,460
3,300
1,300
4,300
195
699
Todine-132 Betas
0.681
0.934
1.150
1.583
2.111
1)
20
22
22
21
Todine-133 Betas
0.49
1.34
7
93
Todine-134 Betas
0.87
1.55
2.65
3.51
5
65
25
5
Todine-135 Betas
0.40
1.00
1.43
35
40
25
7,300
1,300
*The 50%-dose radius is defined, for a point scurce in tissue, as the distance
within which 50% of che dose, for that energy, is distributed.
**Since this isotope with 53-min half-life igs important only for aboue 6 hr, it
was not considered in the Marshallese thyroid dose calculations.
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