https://doi.org/10.1140/epjd/s10053-024-00809-7
Regular Article - Atomic and Molecular Collisions
Convergent close-coupling calculations of positron scattering from neon and argon
Department of Physics and Astronomy, Curtin University, 6102, Perth, Western Australia, Australia
Received:
2
October
2023
Accepted:
23
January
2024
Published online:
9
February
2024
Positron scattering from the noble gas atoms neon and argon is calculated using the single-center convergent close-coupling (CCC) method. Unlike previous CCC calculations, we have relaxed the frozen-core approximation by fully opening the outermost s and p shells, and find better agreement with experiment for excitation energies and dipole polarizability. We have used this improved structure model to calculate elastic, elastic differential, total, momentum-transfer, electron-loss, and total bound excitation cross sections. We have applied a complex model potential calculation, scaled to our single-center CCC results, to obtain direct ionization and positronium-formation cross sections for these systems. This complex model potential was also used to calculate results between the positronium-formation and ionization thresholds, giving complete results from 
eV to 5000 eV. Overall, good agreement is observed with past theory and experiment for most transitions.
© The Author(s) 2024
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