Differential cross-sections for the electron impact excitation of the B 1Σ u+, c 3Π u, a 3Σ g+, C 1Π u, E, F 1Σ g+ and e 3Σ u+ states of molecular hydrogen
Using energy loss spectroscopy, normalized differential and integral cross-sections for the electron impact excitation of the lowest bound excited states of H2 from the ground X 1Σg+ state have been measured at 17.5, 20 and 30 eV impact energies and for scattering angles from 5° up to 130°. These differential cross-sections (DCSs) are an effort to improve those taken previously (Khakoo M A and Trajmar S 1986b Phys. Rev. A 34 146). Here a more sophisticated electron spectrometer and a more accurate spectrum analysis code is used to unfold the energy loss spectra. The results are compared with earlier DCS measurements for the B 1Σu+, c 3Πu, a 3Σg+, C 1Πu states of H2 and with existing theoretical results for the B 1Σu+, c 3Πu, a 3Σg+, C 1Πu, E, F 1Σg+ and e 3Σu+ states.