For the periods under consideration, (ref.7)
4
¢5
t
ny
E
E
n
dy(abe)
i
dy(Feather)
Ps
1 O.15d
ld
1.12
1.9 Mev 0.75 Mev 0.10 gm/em 0.11 gm/em™ 6.4 om™)
2
1
4
1.25
1.2
O44
0.05
0.06
iL
3
4
30
0.98
0.85
0.29
0.03
0.04
18
Thus the total dose in 30 days, D, is
D = 1.7 (2300) (0.030 + 0.047 # 0.133)
s 820rep
for shot 2, and 620/13.4 2 60repfor shot 9.
It is of interest to note that 120 rep of the shot 2 dose occurs in the first
day, 180 rep between first and fourth day, and the remaining 520 rep in the
following 26 days out of 30, and similarly for shot 9.
This of course cannot
be considered as more than an order of magnitude calculation in view of the
assumptions, but 1t does illustrate that a rather significant degree of damage
could oceur in this radiosensitive area.
HeExternalbetadoses.
Several cases were reported (8) of animals
with activity deposited on head, abdomen, etc.
If one assumes that this de-
posit results from contact with the ground, particularly around the mouth and
head, one can calculate an extreme case for external beta exposure from this
material by assuming that the material was deposited at the beginning of the
exposure and remained throughout it.
In addition, an external beta exposure
to the head from the ground itself can be estimated.
For the first case an & July dose rate reading of 50 mr beta on the head
of an animal is taken from ref. 7.
This is the highest of the group of read-
ings given,
pby
s
Bty
t
x ()
1.2
e
20
e
e
e
a
«
2
°
e
e
«
e
e
e
e
®
e
(16)
ya
DO’ ARCHIVES