Accession Number:

AD0483423

Title:

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

Descriptive Note:

Corporate Author:

NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA

Personal Author(s):

• Adams, Charles E.
• Holden, Francis R.
• Wallace, Norman R.

Report Date:

1951-08-01

Pagination or Media Count:

32.0

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 rhr 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:

• Radioactivity, Radioactive Wastes and Fission Products
• Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE