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neutralized by the nrogressi-ve redioactive decay.
hous
In addition the transit dose
frou the cloud pessing over the atolls could not be estineted.
veriables were taken into account and the doses calculated.
A411 of these
These doses were
consistent with the doses that were actually measured on Rongerik by film that
wes stored in refrigerators and by film exposed outside on this atoll,
In view
of this internal consistency it is believed that the dose of radiation on the atolls
its reasonably accurate.
Details of the calculation of the dose are in the official
report which discusses in detail the probable range in values (ref, 1, Chapter 1)
CHARACTERISTICS CF THE GAMMA R'DIATION
The fellout material when deposited on the ground forned a large planer source
of radietion.
The energy distribution of the radiation reaching an exposed indiv=
idual is influenced by its passage through the intervening air.
A knowledge of the
4nkerent gamma spectrum as it emminates from the mrterial itself is essential in
order to determine the spectrum that impinges upon exposed individuels.
When one
takes into account the spectometric data on the mixed fission products and the
degredation by Compton scattering along the path in air, a dose energy histogram
can be constructed,
showing that there are roughly three regions with maxina at
10C, 700, and 1500 REV,
The total exposure is thus the resultant effect of partial
doses from each energy region, making the exposure energy condition significantly
different fron those of radiation therapy, experimental biology or from the prompt
garua radiation of the bomb.
Details of the characteristics of the exposure are
diecussed in reference. (Ref. 1, Chapter 1).
THE CHARACTERISTICS CF THE FALLOUT MATERTAL
The fallout meterial consisted predominently of flakes of calcium oxide resulting froz the incineration of the ecral.
products were derosited,
as enow like,
Upon the flakes of calcium oxide fission
At Rongelap Atoll the material was visible and described
It stuck to the skin, adhered to the heir and clothes, the vegetation
BOEaRcHives
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