Electronic correlation effects of the target in excitation cross sections by electron impact in H

The authors report differential cross sections for the X 1 Sigma + g to b 3 Sigma + u , a 3 Sigma + g and c 3 Pi u excitations of H 2 by electron impact at 20 eV. They are particularly interested in studying correlation effects of the target on these cross sections. Comparisons are made with available theoretical and experimental results.