J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation
In the preceding paper [Konovalov et al., Phys. Rev. A 84, 032707 (2011)] we used the J -matrix (JM) method to solve the S-wave e-He scattering problem within the frozen-core model of helium. In the present work we go beyond the frozen-core model and adopt a general configuration-interaction descrip...
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| Format: | Journal Article |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/24394 |
| _version_ | 1848751415862755328 |
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| author | Konovalov, D Fursa, D Bray, Igor |
| author_facet | Konovalov, D Fursa, D Bray, Igor |
| author_sort | Konovalov, D |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In the preceding paper [Konovalov et al., Phys. Rev. A 84, 032707 (2011)] we used the J -matrix (JM) method to solve the S-wave e-He scattering problem within the frozen-core model of helium. In the present work we go beyond the frozen-core model and adopt a general configuration-interaction description of helium (within the S-wave model). As a result a more accurate description of the helium target states is achieved that allowed us to obtain highly accurate numerical solutions of the e-He scattering problem for the elastic, 21,3S, 31,3S excitation and total ionization cross sections. The JM results are confirmed by the corresponding convergent-close-coupling (CCC) calculations. At energies above the ionization threshold some minor pseudoresonances are still evident in both the JM and CCC results despite the large bases used. The pseudoresonances are nearly completely eliminated by averaging a number of JM calculations creating a challenging benchmark for any current or future ab initio electron-atom scattering methods. |
| first_indexed | 2025-11-14T07:52:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-24394 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:52:22Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-243942017-09-13T15:55:20Z J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation Konovalov, D Fursa, D Bray, Igor In the preceding paper [Konovalov et al., Phys. Rev. A 84, 032707 (2011)] we used the J -matrix (JM) method to solve the S-wave e-He scattering problem within the frozen-core model of helium. In the present work we go beyond the frozen-core model and adopt a general configuration-interaction description of helium (within the S-wave model). As a result a more accurate description of the helium target states is achieved that allowed us to obtain highly accurate numerical solutions of the e-He scattering problem for the elastic, 21,3S, 31,3S excitation and total ionization cross sections. The JM results are confirmed by the corresponding convergent-close-coupling (CCC) calculations. At energies above the ionization threshold some minor pseudoresonances are still evident in both the JM and CCC results despite the large bases used. The pseudoresonances are nearly completely eliminated by averaging a number of JM calculations creating a challenging benchmark for any current or future ab initio electron-atom scattering methods. 2012 Journal Article http://hdl.handle.net/20.500.11937/24394 10.1103/PhysRevA.86.052704 American Physical Society restricted |
| spellingShingle | Konovalov, D Fursa, D Bray, Igor J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation |
| title | J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation |
| title_full | J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation |
| title_fullStr | J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation |
| title_full_unstemmed | J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation |
| title_short | J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation |
| title_sort | j-matrix calculation of electron-helium s-wave scattering. ii. single ionization and single excitation |
| url | http://hdl.handle.net/20.500.11937/24394 |