Operation GREENHOUSE. Scientific Director's Report of Atomic Weapon Tests at Eniwetok, 1951. Annex 1.1. Prompt-Gamma-Ray Measurements. Part 2. Prompt-Gamma-Ray Intensity as a Function of Time,
NAVAL RESEARCH LAB WASHINGTON DC
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This report describes the procedure followed and the results obtained in measuring, as a function of time, the prompt-gamma radiation emitted within 1,000 seconds after the explosion of the atomic weapons studies in Operation Greenhouse. The design of the experiment and a description of the equipment are given. The fast coaxial scintillation detectors for the Greenhouse test were used without collimators at a distance of several mean free paths from the source. Numerous factors complicated the interpretation of the data obtained, thus reducing the accuracy that may be ascribed to the results. The probable peak gamma-ray intensity, the time of occurrence of the peak, and the prompt-gamma decay curves as a function of time were obtained for each shot. A composite decay curve fitting all the shots was obtained, and from this, a scaling factor was deduced which related the shot energy to the gamma-ray intensity.
- Nuclear Instrumentation
- Nuclear Physics and Elementary Particle Physics