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Operation Buster-Jangle. Project 10.6. The Measurement of Gamma-Ray Intensity vs Time
Rept. for Oct-Nov 1951
ATOMIC ENERGY COMMISSION WASHINGTON DC
Pagination or Media Count:
Gamma-ray intensity vs. time data in the range from a few milliseconds to about 20 sec were obtained on tests C and E of Operation Buster and the underground test Shot F of Operation Jangle. The equipment consisted of a detector consisting of a solution of terphenyl in toluene surrounding a coaxial phototube, the output of which was fed into a 5.5-decade pseudo-log circuit which in turn was direct-coupled to the plates of a 3-in. battery-operated scope tube. The face of the scope was photographed with a 16-mm strip-film camera. The data seem to indicate that the source of the gamma radiation for these times is due to neutron capture in the nitrogen of the air, followed in about 0.2 sec by gamma rays from the decay of fission fragments, the latter modified by shock hydrodynamics and rise of the fireball.
APPROVED FOR PUBLIC RELEASE