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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.
J. Halperin and R. W. Stoughton, C. M. Stevens, D. E. Ferguson and D. C. Overholt
Nuclear Science and Engineering | Volume 1 | Number 2 | May 1956 | Pages 108-111
Technical Paper | doi.org/10.13182/NSE56-A17515
Articles are hosted by Taylor and Francis Online.
Depleted uranium was irradiated in the thermal neutron flux of the Low Intensity Test Reactor at Oak Ridge National Laboratory. From mass spectrographic analysis of Pu240 and from chemical determination of Pu content, the effective capture cross section (including both thermal and epithermal neutron capture) was determined for Np239 to be 80 ± 15 barns.
