Two independent calculations have been carried out to obtain accurate differential cross sections (DCS) and spin asymmetries for the elastic scattering of electrons from ground-state hydrogen over the energies of the lowest and resonances. They use the IERM method and the direct numerical approach of Wang and Callaway. The effects of the ionization continuum on DCS, resonant positions, and spin asymmetries are re-examined in light of the present calculations. The calculated elastic DCS are compared with the experiments of Williams and the calculation of McCarthy and Shang. A benchmark calculation for the phaseshifts has been tabulated to assist future experimental normalization procedures.

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Two independent calculations have been carried out to obtain the differential cross sections (DCS) for the excitation of n = 2 and 3 states from the ground state of hydrogen at electron impact energies lying between the n = 3 and n = 4 thresholds. They are the 15-state R-matrix calculation of Fon et al and the algebraic variational method of Wang and Callaway. The cross sections show complicated and irregular structures associated with overlapping resonances in different partial waves. Resonance analysis has been carried out. In the absence of experiments and other theoretical calculations, the 15-state R-matrix calculation is used to describe the shape of the DCS while the absolute magnitude is estimated by the algebraic variational method.

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