—Kg@«6eo-.mTCTCTLTFTTFTeeeNT
peeuadure similar to that described by Lowman et a].
(1957}.
Tee counts per minute (c/s) for each radioisotope were converted to disintegrations per minute (d/m) b applying the
correction factors listed in Table 1.
The size of the
Sample affects the geometry ,and the correction factors listed
@o not include errcr due to the differences itn geometry
between the biclogical samples and the raditoisctope standards
used to calibrate the efficiency of the counting system.
TRis error ranged from 10 per cent for the smellest baclogical samples to 60 per cent for the largest samples.
The approp:iate decay-corraction facter was applied
also to correct the values to the date of collection.
Table 1.
Correction factors used to convert
gamma counts to ¢:sintegr at tons
Radioisotope
Correction
fay oy
x40
609
csi3?
16.5
za65
54
Zn?mp9
ce*7
14.5
3.6
ce44_p,144
wi8s
Rub _ 2,106
|
oe
.
:
40
9.6
66.4
eee