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- Title
Convergent close-coupling calculations of positron scattering from neon and argon.
- Authors
Mori, N. A.; Scarlett, L. H.; Bray, I.; Fursa, D. V.
- Abstract
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 10 - 5 eV to 5000 eV. Overall, good agreement is observed with past theory and experiment for most transitions.
- Subjects
SCATTERING (Physics); NEON; ARGON; POSITRONIUM; NOBLE gases; ELECTRON impact ionization
- Publication
European Physical Journal D (EPJ D), 2024, Vol 78, Issue 2, p1
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/s10053-024-00809-7