BES
TABLE I
BIOLOGICALLY IMPORTANT FISSION PRODUCTSIN FALL-OUT
Radionuclide
as%
uate
eo
%o
Type of
radiation
Physical
Ty
lis
3.1
-
BY
C3137
6.15
6.2
8. Y
Fraction entering body
Half-life (d)}
8
1, 1x104
Biological
Tb
1
140
by
Effective
ingestion
by
ingestion
T
fw
fa
1.6
1.0
0.76
138
1,0
0.18
Sr90-y 9
5,77
3,2
B
104
1.8x 104
6.4 x108
0.30
0.40
Sr?
4,79
2.9
8
50.5
1,8X 104
50.4
0,30
0,40
pal? -als?
6.4
5.17
8. y
12.8
65
10,1
0, 05
0, 28
Ru106 -Rh106
0, 38
2.7
8, y
1.3
1,2
0.03
0,27
Rubs
3.0
6.6
8. Y
7,3
6,2
0.03
0,27
Pm
2.7
-
8
920
656
383
1074
0, 25
Cems -Pp
6.0
4.9
8,y
290
563
191
1074
0.25
Zx% -Nb%
6.2
5.7
8,y¥
63,3
450
10-4
0.25
Cel!
6.0
-
8, y
a2
563
30
10-4
0, 25
350
144
365
4.1
55.5
NHOD °H°S
Mass yield
Zn
0
0
a
245
Co®
0
0
8, Y
1, 9x103
Mn*4
0
0
B, Y
300
Fe 5
0
0
B,Y
1, 1x108
*Y25 - Thermalneutron fission - nuclear power reactors
288 - Fast neutron fission - nuclear weapon testing
9,5
17
800
0.10
0.30
9,5
0,30
0,40
5.6
0, 10
0,30
0.10
0.30
463
en ee oS
Neutron-induced activities