UNCLASSIFIED
ABSTRACT
The properties of individual fallout particles produced by
nuclear detonations at zero height over shallow sea water are analytically described for the first time. The particles produced during Operation REDWING were slurry masses composed of water, dissolved and crystalline sea salts, and
seawater-insoluble solids from the weapon, barge, and ocean
floor. Special techniques were used to measure the chloride,
water, and insoluble-solids content of individual slurry particles, Autoradiography showed that the activity is primarily
associated with the solids.
A table of experimental data presents particle size versus
time of arrival after detonation as well as measurements of
particle density and relative specific activity. Estimates of
mass and relative activity of fallout per unit area for certain
locations about the shot point are shown.
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