CROCKER, KAWAHARA, AND FREILING
PAN
|
325
170
|
80
e995
| T TTT
10!
] PErtyl
80
42
i
24
2
I
7
poy
8
‘
Te
e
107!
PT Tt
e
or?
10!
10?
10
PARTICLE DIAMETER, p
104
Fig. 5—Effect of particle size on fractionation ratio.
SUMMARY
Correlations indicate that the fractionation behavior of ™Sr, *Sr,
Sty '8%cs, 4°Ba, and Ce relative to Zr in silicate-surface bursts
does not differ essentially from that observed in a coral-surface burst
or in air bursts. Differences are noted for °°Mo and 7*Np. For !Ru,
Ru, 1, Te,cs Moe, and 7% Pu, some differences in degree of
fractionation
are indicated, and further study of these nuclides is
recommended.
ACKNOWLEDGMENTS
In addition to the U. S. Atomic Energy Commission, the Defense
Atomic Support Agency contributed. generously to the support of this
study. Some of the data were obtained from U. S. Air Force sources.
REFERENCES
1, D. E, Clark, F. K. Kawahara, and W. C. Cobbin, Fallout Sampling and Analy-
sis: Radiation Dose Rate and Dose History at 16 Locations, Report POR-