Accession Number : AD0483423

Title :   SCIENTIFIC DIRECTOR'S REPORT OF ATOMIC WEAPONS TESTS AT ENIWETOK, 1951.ANNEX 6.4. FALL-OUT PHENOMENOLOGY,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA

Personal Author(s) : Adams, Charles E. ; Holden, Francis R. ; Wallace, Norman R.

Report Date : AUG 1951

Pagination or Media Count : 32

Abstract : An experiment was designed to measure the fall-out pattern and to study the nature of the fall-out particles from low-level, experimental atomic bomb air bursts in order to provide data for the appraisal of the potential health hazard from external and internal exposure to the fall-out products. Samples of the fall-out from Dog and Easy Shots were obtained. A study of the size distribution of the active particles was made by size fractionation and radioautographic techniques. Radiochemical analyses of the fallout were made. In addition, a study of the structure and composition of the fall-out particles was made. It was determined that the bulk of the radioactivity in the fall-out was associated with particles greater than 5 microns in diameter. The highest radiation levels were found on Bogallua at E + 30 min. The reading was about 30 r/hr as measured from a helicopter hovering 10 to 20 ft above the island. (Author)

Descriptors :   *FALLOUT, *NUCLEAR EXPLOSIONS, *NUCLEAR PARTICLES, AIRBURST, LOW ALTITUDE, HAZARDS, EXPOSURE(PHYSIOLOGY), METEOROLOGICAL PHENOMENA, WIND, RAINFALL, NUCLEAR BOMBS, PERSONNEL, LOGISTICS, DISTRIBUTION, PARTICLE SIZE, MEASUREMENT, RADIOCHEMISTRY, CHEMICAL ANALYSIS, SOURCES.

Subject Categories : Radioactiv, Radioactive Wastes & Fission Prod
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE