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Proving DRACO will deliver
The United States is now closer than it has been in over five decades to launching the first nuclear thermal rocket into space, thanks to DRACO—the Demonstration Rocket for Agile Cislunar Orbit.
Hugh F. Henry
Nuclear Science and Engineering | Volume 72 | Number 1 | October 1979 | Pages 65-74
Technical Paper | doi.org/10.13182/NSE79-A19309
Articles are hosted by Taylor and Francis Online.
The radiative capture of unidirectional neutrons by the individual components of a stack of cadmium-covered gold foils was investigated for several spectra, principally those obtained by various modifications of the emission from a 252Cf source. The relative experimental activation of the foils was empirically described by a simple three-group relation reflecting capture in the 5-eV resonance, the 60-eV resonance, and an “average” of other capture regions. The incident fluxes in these respective regions could then be identified, and it was shown that the relative activations of the individual foils due to neutrons in these three energy regions depended on the incident spectrum. The energy dependence of the flux in the 5- to 60-eV range was also empirically shown to depend on the neutron spectrum.