-j7-
Table 3. Sr?” levels in Kabelle Island soil collected July 18,
1957.
Values as of February 1,
Resin column
Sr°~
90
d/m
in sample
1958
Grams of dry
soilin sample
A
287
0.95
B
298
0.95
Average
Sr99d/m/g
dry soil
307+5.8
Sunshine*
units
3990
*Sunshine unit = d/m/g Sr299/g Ca/2. 2
Confirmation of the y29 eluted from the resin was obtained by de-
termining the decay rates of the samples.
ranged from 56 to 63 hours,
The half life of four samples
which isin agreement with the half life
as given by Kinsman, 10 who cites values from 61 to 65 hours.
The
90
.,90
,
90
;
Sr°--Y
value was taken as twice the Y°™
value when equilibrium is
reached.
Summary of the Radionuclides in the Sample
A summary of the amounts of the radionuclides found in the soil
sample is given in Table 4.
Fe’
55
andSr°
90
-Y
lated fractions.
.,90
The values for all the radionuclides except
were calculated from the gamma curves of the iso-
Those for Fe?” were calculated from methane gas-flow
counter measurements and those for §r90_y20 from end-window counter
measurements.
The correction factor for Fe? was based on secondary
standards which were accurate within 10 per cent.
Other correction
fs
co
a
3