Convergent close-coupling calculations of positron–helium scattering at intermediate to high energies
| Autor: | Huayou Wu, Dmitry V. Fursa, Andris T. Stelbovics, Igor Bray |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
Scattering chemistry.chemical_element Molar ionization energies of the elements Condensed Matter Physics Atomic and Molecular Physics and Optics Positronium Positron chemistry Ionization Physics::Atomic and Molecular Clusters Physics::Atomic Physics Atomic physics Close coupling Excitation Helium |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 37:1165-1172 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/0953-4075/37/6/002 |
| Popis: | The single-centred convergent close-coupling method has been applied to positron-helium scattering at energies from the first ionization threshold to 1 keV for calculating one-electron excitation and ionization processes. Total scattering, positronium formation plus single ionization (unresolved), and target excitation cross sections have been calculated. It is found that the often-used frozen-core approximation for the target structure leads to a small but systematic overestimation of the cross sections. Generally, the agreement between the present and most recent calculations, as well as experiment, is satisfactory. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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