Operation GREENHOUSE. Scientific Director's report of atomic weapon tests at Eniwetok, 1951. Annex 6. 5. Interpretation of survey-meter data
This is the Scientific Director's Report of Atomic Weapon Test at Enuivetok, 1951. Under laboratory conditions, a study of survey-instrument response to fission-product activity was made. This study involved a knowledge of beta-ray energy, gamma-ray energy, and beta-ray and gamma-ray dose rates associated with fission-product radiation fields. Fission-product activity was collected on aluminum plaques which were flown through the radioactive cloud following each of four bursts. These plaques were flown to the Laboratory for the work done. Beta-ray dose rates were determined with specially constructed beta-ray surface chambers previously calibrated with beta-ray isotopes. Using aluminum absorbers, beta-ray absorption curves were run and compared with similar absorption measurements obtained using known beta-ray isotopes. Gamma-ray dose rates were obtained by shielding out the beta-ray contribution. The response of various types of commercially available G-M counters and ion-chamber counters to fission-product beta-ray and gamma-ray was studied. Changes in beta-ray energy were studied for the period from 44.6 to 215.7 hr. It was found that the beta-ray absorption curve could be reproduced by a high-energy and low-energy component of beta radiation. Laboratory determination of effective gamma-ray energies using half-value-layer measurements by means of aluminum, copper, and lead filters showed the energy to be dependent upon the absorber used.
- Research Organization:
- Naval Radiological Defense Lab., San Francisco, CA (USA)
- OSTI ID:
- 6336629
- Report Number(s):
- AD-A-995257/3/XAB
- Country of Publication:
- United States
- Language:
- English
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Operation Greenhouse. Scientific Director's report of atomic weapon tests at Eniwetok, 1951. Annex 6. 8. cloud radiation field
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450202* -- Explosions & Explosives-- Nuclear-- Weaponry-- (-1989)
BETA PARTICLES
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ENIWETOK
EXPLOSIONS
FILTERS
GAMMA RADIATION
GREENHOUSE PROJECT
IONIZING RADIATIONS
ISLANDS
MARSHALL ISLANDS
MEASURING INSTRUMENTS
MICRONESIA
MONITORS
NUCLEAR EXPLOSIONS
NUCLEAR WEAPONS
OCEANIA
PERFORMANCE
RADIATION MONITORS
RADIATIONS
SURVEY MONITORS
TESTING
WEAPONS