-17-
Table 3. Sr’? levels in Kabelle Island soil collected July 18,
1957.
Resin column
Values as of February 1, 1958
Sr’
90
d/m
in sample
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 Sr99/g Ca/2.2
Confirmation of the y20 eluted from the resin was obtained by determining the decay rates of the samples.
ranged from 56 to 63 hours,
as given by Kinsman,
gr?99_y
90
10
The half life of four samples
which is in agreement with the half life
who cites values from 61 to 65 hours.
The
value was taken as twice the Y99 value when equilibrium is
reached.
Summary of the Radionuclides in the Sample
A summaryof the amounts of the radionuclides found in the soil
sample is givenin Table 4.
Fe°5 and Sr
90_90
lated fractions.
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. y90 from end-window counter
measurements.
The correction factor for Fe°> was based on secondary
standards which were accurate within 10 per cent.
Other correction