=
are given inTable 2,65~-1,
The H fl hour values were deterained using -1.3
ag the garma-decay exponent as detercined fron the curves of Fig. 2.65-2.
The
wv
ae
roy points on YVONNE and WIIMA are snown in Pig, 2,65=3 along with the
corresponding H # 1 hour readings.
Fig, 2.65-4 shows the H # 1 hour average
dose rates for the seven islands surveyed,
By
Garma dose rate decay was.determined by counting gross fall"
FE
Decay Deta:
out semples with a Jordan Survey Meter mounted in a sad pig for constant
geozetry.
A typical garsa-decay curve is shown in Fig, 2.65-5,
A typical beta~
dzcay curve is shown in Fig. 2,65-~6.
Radiochemistry:
GsNE.
Ground scoop samples were recovered from Sites WILMA end
Another sample was retrieved from a depression in the canvas oo | an
~t
abandoned truck at Site GzNE,
It was discovered that all the particles fren the
truck canvas were radioactive, while very few of the particles from the ground
‘probable for particles other than fallout to be collected at the heisht of a
“rs ek cab, Csd to the belief that this ssuple is vep.csentative of the fallout
Sa that erca.
AL of these sanples were size -gro ied into various size fracitccs,
and radiochemical analyses for Np??? and Mo’? were performed on each fraction.
reom the enalysis, the following ecncl-sions wore dicvas
1,
peed fractionates with isspect
to Mo? as a function of particle -ize,
As shown in Table 2,45.-2, the ratios of wpe to Mo?? and the capture/fission
vstihos, whoich are proportional to then,
of the sample increases,
appear to decvcase as the parvicle sine
Even the lowest value, 0.14, is almost twice the 0,936
value reported by LASL for a cloud sample.
2. The individual contributions of Np©?? end Mo79, in relative units, to
the total beta activity of the semples generally increase with increasing Parte
o
dele size.
corienideE
LANL RG
aS?
~ 34 -
Lo