Accession Number : AD0708566

Title :   SOME PROPERTIES OF RADIOACTIVE FALLOUT: BALLOON-MOUNTED SHOT PRISCILLA.

Descriptive Note : Final rept.,

Corporate Author : URS RESEARCH CO SAN MATEO CALIF

Personal Author(s) : Miller,Carl F.

Report Date : SEP 1969

Pagination or Media Count : 20

Abstract : Radiochemical assay results from measurements on samples of fallout from the balloon-mounted (air) Shot Priscilla revealed the presence and relatively high abundance of induced activities from soil materials near ground zero. The decay rates at early times were therefore significantly slower and the relative exposure rates higher than for normal mixed fission products. On the other hand, the decay rate of the fallout at distances greater than 10 miles from ground zero was essentially parallel to that of unfractionated U-235 fission products. The bulk weight of the close-in fallout samples apparently consisted almost entirely of blast-raised dust that settled along with a few larger particles into the collecting trays. The measured specific activity of one single large particle with a diameter of about 750 microns was 40 terafissions/gm. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, *FALLOUT), BALLOON EQUIPMENT, AIRBURST, ARTIFICIAL RADIOACTIVITY, FISSION PRODUCTS, IONIZATION

Subject Categories : Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE