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- W2075325832 abstract "An approach to calculate elastic differential cross sections of atoms and ions at small angles is shown. The key point of this approach is selecting a suitable slope before integrating the Dirac radial equations. The slope is extracted from the normalization coefficient of continuum state solutions in an effective Coulomb field. The approach is utilized to investigate the influence of high partial-wave phase shifts on the cross sections at small angles. As is known, these phase shifts are mainly produced by long-range forces such as the polarization interaction or the Coulomb interaction or both. Calculations using mercury as an example show the effect of high partial waves and different cut-offs on the small-angle differential cross sections in the first Born approximation at 25 eV. These calculations, at 1500 eV, are compared with the recent measurement with the angle-resolved electron energy-loss spectrometer in Xu's group. Furthermore, calculation results are given at the intermediate energies of 50, 100, 300 and 500 eV where the experimental data are available. Comparisons between the theory and experiment over 9-1500 eV show that further studies at the incident energy of about 100 eV are needed." @default.
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- W2075325832 date "1998-05-28" @default.
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- W2075325832 title "An accurate approach for high partial-wave phase shifts in electron elastic scattering from closed-subshell atoms" @default.
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- W2075325832 doi "https://doi.org/10.1088/0953-4075/31/10/020" @default.
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