Convergent-close-coupling formalism for positron scattering from molecules
The ab initio convergent-close-coupling method has been extended to positron-molecule collisions within the adiabatic (fixed-nuclei) approximation. Application to molecular hydrogen at energies from 0.1 to 1000 eV has yielded convergent total ionization and grand total cross sections over most of th...
| Main Authors: | , , |
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| Format: | Journal Article |
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American Physical Society
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/15460 |
| _version_ | 1848748899489021952 |
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| author | Zammit, Mark Fursa, Dmitry Bray, Igor |
| author_facet | Zammit, Mark Fursa, Dmitry Bray, Igor |
| author_sort | Zammit, Mark |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The ab initio convergent-close-coupling method has been extended to positron-molecule collisions within the adiabatic (fixed-nuclei) approximation. Application to molecular hydrogen at energies from 0.1 to 1000 eV has yielded convergent total ionization and grand total cross sections over most of the energy range. We find that very large calculations are required for convergence, even in the case of low-energy elastic scattering, due to the effects of positronium formation. In general, the comparison with experiment is good. |
| first_indexed | 2025-11-14T07:12:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-15460 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:12:22Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-154602017-09-13T13:41:03Z Convergent-close-coupling formalism for positron scattering from molecules Zammit, Mark Fursa, Dmitry Bray, Igor The ab initio convergent-close-coupling method has been extended to positron-molecule collisions within the adiabatic (fixed-nuclei) approximation. Application to molecular hydrogen at energies from 0.1 to 1000 eV has yielded convergent total ionization and grand total cross sections over most of the energy range. We find that very large calculations are required for convergence, even in the case of low-energy elastic scattering, due to the effects of positronium formation. In general, the comparison with experiment is good. 2013 Journal Article http://hdl.handle.net/20.500.11937/15460 10.1103/PhysRevA.87.020701 American Physical Society fulltext |
| spellingShingle | Zammit, Mark Fursa, Dmitry Bray, Igor Convergent-close-coupling formalism for positron scattering from molecules |
| title | Convergent-close-coupling formalism for positron scattering from molecules |
| title_full | Convergent-close-coupling formalism for positron scattering from molecules |
| title_fullStr | Convergent-close-coupling formalism for positron scattering from molecules |
| title_full_unstemmed | Convergent-close-coupling formalism for positron scattering from molecules |
| title_short | Convergent-close-coupling formalism for positron scattering from molecules |
| title_sort | convergent-close-coupling formalism for positron scattering from molecules |
| url | http://hdl.handle.net/20.500.11937/15460 |