The elastic cross-sections for positron scattering from Xe have been determined by the polarized-orbital method while the excitation cross-sections have been calculated within a distorted wave framework in an energy range up to 200 eV. The total cross-section is compared with available experimental results for xenon. We analyze the relative contributions to the total cross-section of our elastic and excitation cross-sections and of the cross-sections for positronium formation and for ionization from other publications. We compare these results with experimental measurements for the total cross-section. Our results are in satisfactory agreement with the experimental measurements at low energies, but differ at energies where positronium formation is important. At energies above 100 eV our total cross-section is displaced above the experimental curve by 20%, suggesting a systematic error either in the experimental results or in one or more of our theoretical calculations.
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - 2002|
Parcell, L. A., McEachran, R. P., & Stauffer, A. D. (2002). Positron scattering from xenon. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 192(1-2), 180-184. https://doi.org/10.1016/S0168-583X(02)00865-0