The elastic scattering of electrons from krypton, neon and xenon

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Abstract
Measurements are reported of angular distributions for electrons elastically scattered from krypton in the energy range 30 eV to 200 eV. Distributions are also given for neon at 100 eV and xenon at 60 eV. The results agree reasonably well with those of previous workers, but, as observed for argon by Lewis et al. (1974), at the lower energies an increasing discrepancy is observed. The authors calculate angular distributions using a semi-phenomenological optical model and find good agreement with the experimental data at 100 eV and above. At all but low angles the relativistic calculations of Walker (1971) which ignore excitations of non-elastic channels, are in very good agreement with the data. The relative dependence with energy of the differential cross section at 30 degrees scattering angle has been measured for krypton, neon and xenon in the range 30 eV to 200 eV and the results are compared with available theoretical and experimental data.