;
diehard
ed
Fok Tatea dik
. Sie
card woe or wee ED eta RP asa
Pt te ame 1 oe
-35-
ation from RhtC® in the snail liver sample. Although the 7
curves for
peaks for both Co?’ and ¢0°° are present in the
7
both samples, the peak for co is not present.
This is expected.
The C028 4n the samples would have passed through about 12 half
lives and would be present in insignificant amounts.
mm", on
the other hand, with a half life of 310 days would have gone
through only about three half lives and its .84 MEV
7 peak 1s
evident in the curves from both samples.
The .84 MEV peak of Mn>4 4s easily confused with the
MEV peak of co,
the
37
.81
In those samples containingboth isotopes,
peak from Min 24 can be detected only after the C028 has
been allowed to decay out as shown in Fig.10, or after chemical
separation.
Figure 11 shows
f
spectrum curves from three clam kidney
samples made 4, 18, and 31 months after the dates of collection.
|
The Co”! and 0° peaks are present in all three curves.
In the
curve analyzed 4 months after the date of collection the .81 MEV
C08 peak is very strong.
In the other two curves this peak has
decayed out and is replaced by the .84 MEV vin>4 peak.
Representative whole
samples in which the 1.12 MEV
7
peak of zn°> has been observed include the following:
Organism
Date of collection
Site of collection
Whole fish
Nov. 8, 1952
Janet Is., Eniwetok
Fish skin
May, June, 1954
Belle Is., Eniwetok
Fish muscle
"
"
n
"
"
"
Fish bone
1
1
"
n
it
iH
Fish liver
n
ft
tt
i
N
1