Range-Energy Relation and Energy Loss of Fission Fragments in Solids

Abstract

The energies of fission fragments transmitted through Al, Ni, Ag, Au, and U-Pd have been measured with surface-barrier detectors. The results, converted to the Lindhard-Scharff-Schiott (LSS) dimensionless parameters $k\ensuremath{\rho}$ (range) and $\ensuremath{\epsilon}$ (energy), were found to fit the empirical equation $k\ensuremath{\rho}=1.158{\ensuremath{\epsilon}}^{\frac{1}{2}}[1\ensuremath{-}\mathrm{exp}(0.0987\ensuremath{\epsilon})]+0.01939\ensuremath{\epsilon}$ in the region $12\ensuremath{\le}\ensuremath{\epsilon}\ensuremath{\le}348$. These results are 10-20% lower than those predicted by the LSS theory. A description is given of the effect of relatively simple modifications to this theory, and suggestions are presented for a more rigorous theoretical approach.