Stopping power of fission fragments in thin Mylar and nickel foils

The energy loss of heavy ions in thin Mylar and nickel foils was measured accurately using fission fragments from 239Pu(nth,f), mass separated by the Lohengrin separator at ILL. detection setup, placed focal plane enabled to measure precisely kinetic difference selected after passing through sample. From these data, stopping powers layers were extracted compared calculations. Whereas large deviations are observed with SRIM-2013 for Mylar, fairly good agreements obtained semi-empirical approach Knyazheva et al. (2006) calculations contained within DPASS database. In nickel, model agreement our data about 10%, while DPASS. We used provide updated parameters rescale database Mylar.