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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. Tsechanski, G. Shani
Fusion Science and Technology | Volume 7 | Number 1 | January 1985 | Pages 125-136
Technical Paper | Experimental Device | doi.org/10.13182/FST85-A24524
Articles are hosted by Taylor and Francis Online.
A simple method for the determination of the energetic parameters of the T(d,n)4He neutron beam from a solid titanium-tritium target is described. The energetic parameters under consideration are: the value of the neutron energy, the neutron energy spread in the beam, the mean deuteron interacting energy, and/or the mean deuteron energy loss in the target. The proposed method is based on an accurate measurement of the energy and the full-width at half-maximum of the T(d,n)4He neutron beam. The measurements are made at the angle under consideration and at 95 deg as a reference angle of the neutron direction relative to the deuteron beam direction. The parameters are obtained by a comparison between the measured results at these two angles. The method does not require any additional measurement equipment other than the standard system used in fast neutron spectra measurements, i.e., a 2- × 2-in. NE-213 liquid scintillator in conjunction with the FORIST unfolding procedure to process the proton recoil spectra into energy spectra.