STOPPING POWER FOR LOW-VELOCITY HEAVY-IONS - (0-1.0)-MEV NUCLEON MG IONS IN 17 (Z = 22-79) ELEMENTAL SOLIDS

The stopping power for Mg24,26 ions in 17 (Z=2279) elemental solids has been studied in the energy region 01.0 MeV/nucleon by application of the Doppler-shift attenuation method. At velocities 2v0<v<5v0 (v0 the Bohr velocity), the scaling factors 1.10 (Ti), 0.90 (V), 0.93 (Fe), 0.97 (Co), 0.99 (Ni), 1.03 (Cu), 1.05 (Ge), 1.05 (Nb), 1.15 (Mo), 1.05 (Pd), 1.08 (Ag), 1.09 (Hf), 1.07 (Ta), 1.05 (W), 1.05 (Re), 1.05 (Pt), and 0.96 (Au) to the commonly used empirical electronic stopping power by Ziegler, Biersack, and Littmark were determined to an accuracy of 5%. At velocities v<2v0, much higher electronic stopping power and different velocity dependence than predicted by the empirical model were obtained. The electronic stopping power was determined to an accuracy of 5%. The reduction of the nuclear stopping power due to the polycrystalline structure of the slowing-down materials was taken into account in the deduction of the electronic stopping power. © 1990 The American Physical Society.