part of the fallout would take about the same amount of time to descend on
the island, even though the lighter parts took longer.
Ranges of fallout time and the dose that would result from them were
caleulated as follows:
Location
Dose in Rads*
Fallout Time
16 hr.
8 hr.
Rongelap
Ailinginae
Rongerik
Utirik
159
72
70
12
Since it was believed that
from that
209
92
106
li
xr
4r
r
r
the fallout time was less than 16 hours,
because of data from other sources,
reports
r
0
r
r
and
the figure used for the report, and the
time on were based on a fallout of 12 hours:**
Location
Best Estimate of
Gamma
Rongelap
Ailinginae
Rongerik
Ucirik
175
69
78
14
Dose
in Air
r
r
4
er
One additional factor of interest concerns the effect of a field,
area, of fallout as opposed to that of X-rays.
or
Particles of a single energy
from an X-ray machine come from a "'point'', or single source.
However, particles
in a fallout field, are not emitted from a single source, but many.
They are
emitted from a 369° circle around the person as he stands or walks and they
are at different energies.
It is as though the person is constantly being
irradiated by X-ray machines of different energies, placed around him in a
*From "Some Effects of
*kTbid, p.
1014703—
3
Ionizing Radiation on Man",
96
p.
6