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DTRA’s advancements in nuclear and radiological detection
A new, more complex nuclear age has begun. Echoing the tensions of the Cold War amid rapidly evolving nuclear and radiological threats, preparedness in the modern age is a contest of scientific innovation. The Research and Development Directorate (RD) at the Defense Threat Reduction Agency (DTRA) is charged with winning this contest.
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.