Fission fragment angular distribution measurements of ²³⁵U and ²³⁸U at CERN n-TOF facility

In order to measure the angular distribution of the fission fragments (FFAD) of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n-TOF facility. In this work, we present the preliminary results on the analysis of new ²³⁵U(n,f) and ²³⁸U(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data. It appears that the results for both ²³⁵U and ²³⁸U are in good agreement with previous measurements up to 20 MeV. From 20 MeV to 200 MeV, the results for ²³⁵U are higher than those of the two datasets recently published (around 8% at 100 MeV); and for ²³⁸U the present data are within the uncertainties of previous ones