GAMMA RADIATION FIELD ABOVE FALLOUT CONTAMINATED GROUND

Technical Report · Wed Oct 28 00:00:00 EST 1959

OSTI ID:4077088

Mather, R L; Johnson, R F; Tomnovec, F M; Cook, C S

Energy and direction distributions of gamma photons 3.5 ft above a fall-out area were measured. The relation between fall-out gamma spectra and the physical characteristics of the radiation over a uniform containment area was studied. The measurements were made with a mobile scintillation spectrozameter nine days after the burst of a fission device. It is concluded that the direct unscattered radiation field, which contributes about 80% of the roentgen effectiveness, can be computed from the source strength and spectrum by simple theory requiring knowledge only of the thickness of overlying inert material. Further experiments are needed to establish the character of this overlying material and the variation of its thickness with time and other parameters. The magnitude and causes of variations in the fall-out source strength and spectrum should also be established. (C.H.)

• Research Organization: Naval Radiological Defense Lab., San Francisco
• NSA Number: NSA-15-013198
• OSTI ID: 4077088
• Report Number(s): WT-1225
• Resource Relation: Other Information: Project 2.3b of Operation TEAPOT. Orig. Receipt Date: 31-DEC-61
• Country of Publication: United States
• Language: English

Related Subjects

HEALTH AND SAFETY
AIR
COMPUTERS
CONTAMINATION
DISTRIBUTION
EARTH
EFFICIENCY
ENERGY
ENVIRONMENT
FALLOUT
GAMMA RADIATION
GAMMA SPECTROMETERS
LEVELS
MEASURED VALUES
NUCLEAR EXPLOSIONS
PHOTONS
PROJECT TEAPOT
RADIATION DOSES
RADIATION SOURCES
SCATTERING
SCINTILLATION COUNTERS
SPECTRA
STANDARDS
THICKNESS
VARIATIONS