Investigating the Energy Dependence of ²³⁹Pu Fission Yields

Experimental fission product yields (FYs) from neutron-induced fission of 239Pu were retrieved and compiled to investigate their energy dependence, a quantity of interest for the understanding of the fission process, as well as for applications (such as nuclear forensics and reactors physics). Spanning 70 years, the compilation resulted in a total of 303 FY datasets, including both cumulative and independent FYs. These datasets were corrected, filtered, and normalized to accurately depict FYs as a function of incident neutron energy. The experimental data was then compared to the GEF model, a prominent theoretical fission model. For direct comparison of experimentally determined cumulative FYs and the theoretical data, the GEF independent FYs were converted to cumulative FYs via ENDF/B-VIII.0 decay data. This work will show the experimental FY trends with incident neutron energy and compare them with the GEF model.