ELECTRONIC STOPPING POWERS OF AU, AG, CU, PD AND CO METALS FOR F-19 IONS AT LOW-VELOCITY

Electronic stopping cross sections for 80-350 keV F-19 ions in Au, Ag, Cu, Pd and Co films were obtained by range measurement. Depth profile s of F-19 in these materials were measured by F-19(p, alpha gamma)(16) O resonance nuclear reaction. A proper deconvolution program was used to extract the depth distribution parameters from the experimental ex citation yield curves. The electronic stopping powers were derived thr ough fitting the projected ranges simulated by TRIM/XLL code to the ex perimentally determined projected ranges. It is shown that the electro nic stopping cross sections obtained in this work agree well with thos e calculated by using TRIM96 as well as previous experimental data and can be described by the four-parameter formulae. (C) 1998 Elsevier Sc ience B.V.