that the beta contribution to the
Therefore, no attempt has been made to
total LiF exposure rates is roughly
to calculate integrated beta doses in
254 at three separate sites within
a manner similar to the gamma doses.
the interior of Bikini Island.
However,
Even
if we assume that the beta
though the beta to gamma ratios at
to gamma ratio is constant throughout
these sites are reasonably constant,
the entire atoll,
it is still difficult to generalize
due to the beta contribution will be
about the variability of this ratio
about 30% of the gamma doses for the
throughout the entire atoll because of
skin;
differences in the mix of beta to
and negligible for the gonads.
gamma emitters in the soil and the
the basis of these results, we believe
density of the vegetative cover, which
that the beta contribution plays a
can provide shielding for the beta
minor part in the total external dose
radiation over the surrounding area.
commitment .
—22-
the additional dose
about 1% for the eye lenses;
On