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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.
A. Smith, P. Guenther, G. Winkler, R. McKnight
Nuclear Science and Engineering | Volume 76 | Number 3 | December 1980 | Pages 357-361
Technical Note | doi.org/10.13182/NSE80-A21327
Articles are hosted by Taylor and Francis Online.
The prompt-neutron-induced fission spectra of 233U, 235U, 239Pu, and 240Pu were measured relative to the prompt-spontaneous-fission-neutron spectrum of 252Cf. Analysis of the measured values indicates that the incremental average-fission-neutron energies relative to a 252Cf fission-neutron spectrum of Maxwellian form with an average energy of 2.13 MeV are −123 ± 30 (233U), −157 ± 24 (235U), −76 ± 29 (239Pu), and −46 ± 29(240Pu) keV.
