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A year in orbit: ISS deployment tests radiation detectors for future space missions
The predawn darkness on a cool Florida night was shattered by the ignition of nine Merlin engines on a SpaceX Falcon 9 rocket. The thrust of the engines shook the ground miles away. From a distance, the rocket appeared to slowly rise above the horizon. For the cargo onboard, the launch was anything but gentle, as the ignition of liquid oxygen generated more than 1.5 million pounds of force. After the rocket had been out of sight for several minutes, the booster dramatically returned to Earth with several sonic booms in a captivating show of engineering designed to make space travel less expensive and more sustainable.
Alan B. Smith
Nuclear Science and Engineering | Volume 155 | Number 1 | January 2007 | Pages 74-83
Technical Paper | doi.org/10.13182/NSE07-A2645
Articles are hosted by Taylor and Francis Online.
Differential neutron elastic-scattering cross sections of 197Au are measured from [approximately equal to]4.5 to 10.0 MeV at incident-neutron energy intervals of [approximately equal to]0.5 MeV. These results are combined with previous lower-energy work by the author and associates to form a neutron-scattering database extending from [approximately equal to]0.3 to 10.0 MeV. A few elastic-scattering distributions and total cross sections from the literature are added to it, and the composite is interpreted in terms of optical-statistical, dispersion, and coupled-channels models. The results are compared with models in the literature and with relevant portions of the ENDF/B-VI nuclear data file. A collective rotational model for the prediction of neutron interactions in this mass-energy region is suggested.