Active neutron NDA techniques for nuclear non-proliferation applications (4). Development of delayed gamma-ray spectroscopy. Experimental research plan

The fission-product yield distributions are unique for each fissionable nuclide and interrogating neutron energy. Ratios of fissile materials (e.g. ²³⁵U, ²³⁹Pu, and ²⁴¹Pu), therefore, could be deduced from differences in the observed neutron-induced delayed gamma-ray (DG) spectra characterized by the difference of these yields. This DG Spectroscopy (DGS) project includes research and development of a measurement system along with confirming and improving nuclear data. Experiments will be held at multiple facilities, including ITU/Ispra (Italy), IRMM/Geel (Belgium), and KURRI/Kumatori (Japan), using a wide range of neutron sources and nuclear material sample targets. The experimental efforts of this DGS project are described in this presentation. (author)