Damping of shell effects in nuclear fission

We propose to measure isotopic fission-fragment yields as a function of excitation energy of the fissioning systems produced by transfer reaction. Using the newly-developed highly segmented PISTA silicon array (Particle Identification Silicon Telescope Array), we aim at obtaining isotopic fission yields with high statistics per bin of about 1 MeV in excitation energy from 6 up to 20 MeV. The two key fissioning systems of interest produced are 236U and 240Pu, corresponding to the n-induced reaction n+235U and n+239Pu respectively. Other nuclei around 238U will also be populated. These data will bring new insights on the disappearance of shell effects with the excitation energy of the fissioning system and are of high relevance for nuclear applications, in particular for Gen-IV reactors operating with fast neutrons.