Electronic stopping powers of solids for slow atoms - art. no. 042901

Based on the dielectric response theory, electronic stopping powers of soli ds for slow atoms have been studied. Using a local-field-correction dielect ric function, we have calculated these stopping powers by including the cor relation and exchange effects. The screening of shellwise electron charge d ensities of slow atoms by the conduction electrons in solids was estimated using a Thomas-Fermi screening model. In this model, atomic shellwise elect ron densities were constructed by a superposition of several Yukawa potenti als. Stopping powers of Al, Ni, Ag, and Au were calculated for atoms with a tomic number between 6 and 18. Calculated results showed that stopping powe rs oscillated with atomic number consistent with experimental data. Present results also indicated that our approach is much improved over other theor etical calculations. A comparison of presently calculated results with avai lable theoretical and experimental data was made and discussed.