Convergent close-coupling method for positron scattering from noble gases
We present the convergent close-coupling formulation for positron scattering from noble gases (Ne, Ar, Kr and Xe) within the single-center approximation. Target functions are described in a model of six p-electrons above an inert Hartree–Fock core with only one-electron excitations from the outer p6...
| Main Authors: | , |
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| Format: | Journal Article |
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Institute of Physics Publishing Ltd
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/8290 |
| _version_ | 1848745613835894784 |
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| author | Fursa, Dmitry Bray, Igor |
| author_facet | Fursa, Dmitry Bray, Igor |
| author_sort | Fursa, Dmitry |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present the convergent close-coupling formulation for positron scattering from noble gases (Ne, Ar, Kr and Xe) within the single-center approximation. Target functions are described in a model of six p-electrons above an inert Hartree–Fock core with only one-electron excitations from the outer p6 shell allowed. Target states have been obtained using a Sturmian (Laguerre) basis in order to model coupling to ionization and positronium (Ps) formation channels. Such an approach is unable to yield explicit Ps-formation cross sections, but is valid below this threshold and above the ionization threshold. The present calculations are found to show good agreement with recent measurements. |
| first_indexed | 2025-11-14T06:20:09Z |
| format | Journal Article |
| id | curtin-20.500.11937-8290 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:20:09Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-82902019-02-19T05:35:29Z Convergent close-coupling method for positron scattering from noble gases Fursa, Dmitry Bray, Igor We present the convergent close-coupling formulation for positron scattering from noble gases (Ne, Ar, Kr and Xe) within the single-center approximation. Target functions are described in a model of six p-electrons above an inert Hartree–Fock core with only one-electron excitations from the outer p6 shell allowed. Target states have been obtained using a Sturmian (Laguerre) basis in order to model coupling to ionization and positronium (Ps) formation channels. Such an approach is unable to yield explicit Ps-formation cross sections, but is valid below this threshold and above the ionization threshold. The present calculations are found to show good agreement with recent measurements. 2012 Journal Article http://hdl.handle.net/20.500.11937/8290 10.1088/1367-2630/14/3/035002 Institute of Physics Publishing Ltd fulltext |
| spellingShingle | Fursa, Dmitry Bray, Igor Convergent close-coupling method for positron scattering from noble gases |
| title | Convergent close-coupling method for positron scattering from noble gases |
| title_full | Convergent close-coupling method for positron scattering from noble gases |
| title_fullStr | Convergent close-coupling method for positron scattering from noble gases |
| title_full_unstemmed | Convergent close-coupling method for positron scattering from noble gases |
| title_short | Convergent close-coupling method for positron scattering from noble gases |
| title_sort | convergent close-coupling method for positron scattering from noble gases |
| url | http://hdl.handle.net/20.500.11937/8290 |