Studies on calculations of prompt neutron multiplicities, fission product yields and isomeric yields by Hauser-Feshbach statistical decay theory

We applied Hauser-Feshbach statistical decay calculations to the primary fission fragment distributions Y(A, Z, TKE) produced by two theoretical model calculations, namely the Langevin 4D and Monte Calro CGMF codes. The fission observables such as post-neutron fission product yields (i.e. independent yield Y_ind(Z, A)), mass-dependent neutron multiplicities ν-bar(A) and isomeric ratios for neutron-induced fission of ²³⁵U(n_th,f) were calculated simultaneously for each fission fragments and the results were compared with experimental data. We found that a realistic distribution of Y(A, Z, TKE) is important to reproduce the experimental fission observables reasonably and our model has a greater potential for predicting more reliable fission observables based on the theoretical fission theory and statistical decay theory. (author)