Operation Greenhouse. Scientific Director's report of atomic weapon tests at Eniwetok, 1951. Annex 6. 8. cloud radiation field
The object of this study was to measure the relationship between the spatial distribution of the radioactive fission products and the resultant radioactive field in an atomic-bomb cloud. Data obtained by the high-intensity rate meters and the jet impactors lead to the following conclusions: (1) There is a definite correlation between the particulate fission-particle density and the gamma-radiation intensity measured within the cloud; (2) The effective energy of the gamma radiation within the atomic bomb cloud is quite low, being of the order of 200 keV; (3) The structure of the atomic bomb cloud resembles a chimney with puffs of radioactive matter in the flue of the chimney; (4) The average roentgen dose accumulated by a plane passing through a cloud of the type tested in the Dog and Easy Shots 210 sec after bomb detonation is approximately 125 r. The average contamination on a plane after passing through a cloud is between 10 and 20 r/hr; no contamination could be detected within the plane; (5) The gamma-radiation effects extend beyond the limits of the particulate radioactive fission products; and, (6) The visible cloud adn the fission-product particulate cloud from the bomb do not coincide exactly; the visible cloud extended beyond the fission-product-cloud in those instances where data were obtained.
- Research Organization:
- Naval Radiological Defense Lab., San Francisco, CA (USA)
- OSTI ID:
- 7248965
- Report Number(s):
- AD-A-995291/2/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
450202* -- Explosions & Explosives-- Nuclear-- Weaponry-- (-1989)
CLOUDS
CONTAMINATION
DETONATIONS
DISTRIBUTION
EXPLOSIONS
FISSION PRODUCTS
GREENHOUSE PROJECT
ISOTOPES
MATERIALS
MEASURING INSTRUMENTS
NUCLEAR EXPLOSIONS
PARTICLES
PARTICULATES
RADIOACTIVE CLOUDS
RADIOACTIVE MATERIALS
RADIOACTIVITY
SPATIAL DISTRIBUTION
SPECTRA
VISIBLE SPECTRA