TABLE
MAXIMUM RADIOACTIVE DUST CONCENTRATIONS EXTTAPOLATED TO SAMPLING DATE (d/m/M})
~
180
175
2440
WoO
0
Airport
City
Chicago
Detroit
Tpailanti
San Francisco
Airport
City
1440
Uyho
LO
1440
Alrport
City
14ho
Uh
Los Angeles
1440
o
0°
Midway
Kwajalei.
Truk
Ponape
Rochester, N.Y.
New fork
Who
4,80
120
os
WOMWOWW
e
Special
Activity
Who
120
Guan
Air Base
Sampling Period
Min.
Mes
wo
wpe
Honolulu
Airport
Special
Days after MIKE
nN
ow
Station
—
2.2.6
Decay Rate
Decay rate data for 23 gummed paper samples yielded an average value
The values of the decay slope calculated from counts of two filtered dust samples were ~ 1.19 ami - 0,95.
for the exponent of the time of - 1,37.
In Mgure 2.13 the activities of typical samples are plotted ayainst
the age of the material (days after MIKE). We have not discovered the cause
of the regular fluctuations,
We are unable ta rule out the possibility that
4% 48 due to some unimown bias in the counting procedure.
The value of the decay rate exponent was the last piece of information obtained. It was not used for extrapolation which was based, instead,
on the conventional exponent of - 1.2.
Fig. 27
fey
]=
-~ 28 +
Mg