Internal consistency in positron-hydrogen-scattering calculations
Internal consistency in a close-coupling approach to positron-hydrogen scattering is investigated with a particular focus on the potential overlap between the atomic and positronium continua. We present results for total, total ionization, and 1s positronium-formation cross sections for projectile...
| Main Authors: | , , |
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| Format: | Journal Article |
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AMER PHYSICAL SOC
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/35611 |
| _version_ | 1848754543061368832 |
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| author | Bailey, J. Kadyrov, Alisher Bray, Igor |
| author_facet | Bailey, J. Kadyrov, Alisher Bray, Igor |
| author_sort | Bailey, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Internal consistency in a close-coupling approach to positron-hydrogen scattering is investigated with a particular focus on the potential overlap between the atomic and positronium continua. We present results for total, total ionization, and 1s positronium-formation cross sections for projectile energies up to 100 eV. We show that, irrespective of whether the continuum is treated by one center, or the other, or both, the same cross sections are generally obtained. This is true only if sufficiently large orbital angular momentum is taken in the close-coupling expansion. Furthermore, unitarity of the close-coupling approach ensures convergence of the physically observable cross sections even if the individual components are not convergent. |
| first_indexed | 2025-11-14T08:42:04Z |
| format | Journal Article |
| id | curtin-20.500.11937-35611 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:42:04Z |
| publishDate | 2015 |
| publisher | AMER PHYSICAL SOC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-356112017-09-13T15:26:01Z Internal consistency in positron-hydrogen-scattering calculations Bailey, J. Kadyrov, Alisher Bray, Igor Internal consistency in a close-coupling approach to positron-hydrogen scattering is investigated with a particular focus on the potential overlap between the atomic and positronium continua. We present results for total, total ionization, and 1s positronium-formation cross sections for projectile energies up to 100 eV. We show that, irrespective of whether the continuum is treated by one center, or the other, or both, the same cross sections are generally obtained. This is true only if sufficiently large orbital angular momentum is taken in the close-coupling expansion. Furthermore, unitarity of the close-coupling approach ensures convergence of the physically observable cross sections even if the individual components are not convergent. 2015 Journal Article http://hdl.handle.net/20.500.11937/35611 10.1103/PhysRevA.91.012712 AMER PHYSICAL SOC restricted |
| spellingShingle | Bailey, J. Kadyrov, Alisher Bray, Igor Internal consistency in positron-hydrogen-scattering calculations |
| title | Internal consistency in positron-hydrogen-scattering calculations |
| title_full | Internal consistency in positron-hydrogen-scattering calculations |
| title_fullStr | Internal consistency in positron-hydrogen-scattering calculations |
| title_full_unstemmed | Internal consistency in positron-hydrogen-scattering calculations |
| title_short | Internal consistency in positron-hydrogen-scattering calculations |
| title_sort | internal consistency in positron-hydrogen-scattering calculations |
| url | http://hdl.handle.net/20.500.11937/35611 |