SINGLE AND DOUBLE EXCITATION OF LIGHT ATOMS INDUCED BY FAST PROTONS AND ANTIPROTONS L. Nagy$^\ast$ and S. Fritzsche $^\sharp$ \inst{ $^\ast$Faculty of Physics, Babe\c s-Bolyai University, 3400 Cluj, Romania \\ $^\sharp$Kassel University, FB 18 Physik, 34132 Kassel, Germany } \abst{Impact-parameter calculations for single and double excitation of the helium and lithium atom are presented. Special attention is given for electron correlation in these transitions. The obtained cross sections are compared to the experimental data and to other theoretical results, if available. }