Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180°
We use an improved target recoil momentum spectroscopy setup to determine differential cross sections for excited metastable state production in atoms and molecules by electron impact and show its capabilities for an atomic helium target. A crossed beam setup with a supersonic helium jet and a pulse...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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Springer Berlin Heidelberg
2014
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/18390 |
| _version_ | 1848749731410345984 |
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| author | Weyland, M. Ren, X. Pflüger, T. Baek, W. Bartschat, K. Zatsarinny, O. Fursa, Dmitry Bray, Igor Rabus, H. Dorn, A. |
| author_facet | Weyland, M. Ren, X. Pflüger, T. Baek, W. Bartschat, K. Zatsarinny, O. Fursa, Dmitry Bray, Igor Rabus, H. Dorn, A. |
| author_sort | Weyland, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We use an improved target recoil momentum spectroscopy setup to determine differential cross sections for excited metastable state production in atoms and molecules by electron impact and show its capabilities for an atomic helium target. A crossed beam setup with a supersonic helium jet and a pulsed electron beam at energies close to the excitation threshold of 19.82 eV was used. Measuring the recoil momentum vector of the target instead of the momentum of the scattered electron removes common restrictions to the accessible scattering angles while the microchannel plate detector ensures a high counting efficiency. Using a photoemission electron source we reach an energy resolution of about 200 meV at 1 μA peak current. Results are compared with simulations using theoretical convergent-close-coupling (CCC), R-matrix with pseudo-states (RMPS) and B-spline R-matrix (BSR) calculations and show good agreement. |
| first_indexed | 2025-11-14T07:25:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-18390 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:25:36Z |
| publishDate | 2014 |
| publisher | Springer Berlin Heidelberg |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-183902017-09-13T13:43:07Z Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° Weyland, M. Ren, X. Pflüger, T. Baek, W. Bartschat, K. Zatsarinny, O. Fursa, Dmitry Bray, Igor Rabus, H. Dorn, A. Inelastic scattering Electron impact excitation We use an improved target recoil momentum spectroscopy setup to determine differential cross sections for excited metastable state production in atoms and molecules by electron impact and show its capabilities for an atomic helium target. A crossed beam setup with a supersonic helium jet and a pulsed electron beam at energies close to the excitation threshold of 19.82 eV was used. Measuring the recoil momentum vector of the target instead of the momentum of the scattered electron removes common restrictions to the accessible scattering angles while the microchannel plate detector ensures a high counting efficiency. Using a photoemission electron source we reach an energy resolution of about 200 meV at 1 μA peak current. Results are compared with simulations using theoretical convergent-close-coupling (CCC), R-matrix with pseudo-states (RMPS) and B-spline R-matrix (BSR) calculations and show good agreement. 2014 Journal Article http://hdl.handle.net/20.500.11937/18390 10.1140/epjti/s40485-014-0006-2 Springer Berlin Heidelberg fulltext |
| spellingShingle | Inelastic scattering Electron impact excitation Weyland, M. Ren, X. Pflüger, T. Baek, W. Bartschat, K. Zatsarinny, O. Fursa, Dmitry Bray, Igor Rabus, H. Dorn, A. Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| title | Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| title_full | Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| title_fullStr | Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| title_full_unstemmed | Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| title_short | Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| title_sort | novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180° |
| topic | Inelastic scattering Electron impact excitation |
| url | http://hdl.handle.net/20.500.11937/18390 |