Evaluation of fission product yield distributions in the U(n, f) reaction.

In this work, the phenomenological potential-driving model based on the random neck rupture model is used to calculate and evaluate the independent yields and cumulative yields of fission products for the mass/charge distribution in the U(n, f) reaction with an incident neutron energy of 0.5 MeV and 14 MeV. In particular, the energy dependence of independent yields, including Kr, Sr, Zr, Mo, Ru, Xe, Cs, Ba and Ce, is evaluated for an incident neutron energy below 20 MeV and compared with GEFY6.2 and ENDF/B-VIII.0 data. Moreover, the energy dependence of cumulative yields, including fission products of Zr, Mo, Ba, Ce, and Nd that are essential for determining parameters such as reactor burnup depth, is also calculated and evaluated. Given the good agreements with both experimental and evaluated data, it can be concluded that the phenomenological potential-driving model is a very useful tool in the evaluation of fission product yield distributions.