Accession Number : AD0454865

Title :   DISTRIBUTION AND CHARACTERIZATION OF FALL-OUT AND AIRBORNE ACTIVITY FROM 10 TO 160 MILES FROM GROUND ZERO, SPRING 1955,

Corporate Author : CALIFORNIA UNIV LOS ANGELES SCHOOL OF MEDICINE

Personal Author(s) : Baurmash, L.

Report Date : 17 NOV 1958

Pagination or Media Count : 128

Abstract : Fall-out patterns of four tower shots were delineated by survey-instrument methods to distances of approximately 160 miles from Ground Zero. Surface-contamination levels in terms of microcurie/sq ft and fall-out particle-size distributions were determined by soil-sample analyses. Airborne radioactivity concentrations determined by air samplers of different types and supports agreed within a factor of 4; aerosol radioactivity median diameters of <5 microns were determined by cascade impactors. The solubilities of fall-out and airborne radioactivity in 0.1N HCl ranged from 20 to 30 and 65 to 85 per cent, respectively. More than 90 percent of the fallout from two shots was magnetic. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, FALLOUT), NEVADA, HIGH ALTITUDE, RADIOACTIVITY, DISTRIBUTION, SAMPLERS, AEROSOLS, CONTAMINATION, AIRBORNE, SOILS, PARTICLES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE