Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility
12th International Workshop on Slow Positron Beam Techniques (SLOPOS12), 1–6 August 2010, Magnetic Island, North Queensland, Australia Positron impact ionization of helium is studied with fully resolved momentum vectors of all continuum particles. An imaging multi-particle momentum spectrometer (rea...
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Language: | English |
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Institute of Physics Publishing
2011
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Online Access: | http://hdl.handle.net/2440/80293 https://doi.org/10.1088/1742-6596/262/1/012047 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/80293 2023-05-15T18:50:32+02:00 Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility Pfluger, T. Holzwarth, M. Senftleben, A. Ren, X. N. Dorn, A. Ullrich, J. Hargreaves, Leigh Randall Lohmann, Birgit Slaughter, D. S. Sullivan, J. P. Lower, J. Buckman, Stephen J. School of Chemistry and Physics International Workshop on Slow Positron Beam Techniques (12th : 2010 : Magnetic Island, Australia) 2011 http://hdl.handle.net/2440/80293 https://doi.org/10.1088/1742-6596/262/1/012047 en eng Institute of Physics Publishing Journal of Physics: Conference Series, 2011; 262:012047 1742-6588 http://hdl.handle.net/2440/80293 doi:10.1088/1742-6596/262/1/012047 Copyright status unknown Conference paper 2011 ftunivadelaidedl https://doi.org/10.1088/1742-6596/262/1/012047 2023-02-06T06:55:07Z 12th International Workshop on Slow Positron Beam Techniques (SLOPOS12), 1–6 August 2010, Magnetic Island, North Queensland, Australia Positron impact ionization of helium is studied with fully resolved momentum vectors of all continuum particles. An imaging multi-particle momentum spectrometer (reaction microscope) detecting all final state particles over the full solid angle was applied. This apparatus was connected to the NEPOMUC facility delivering intense positron beams tuneable over a large energy range with good beam quality. At 80 eV impact energy about 5000 triple coincidence events were collected. Cross sections as function of the longitudinal particle momentum show strong differences compared to respective electron impact ionization data most likely originating from the reversed post collision interaction in both cases. Calculations using the 3 Coulomb wavefunction method show clear discrepancies from the experimental results. T Pflüger, M Holzwarth, A Senftleben, X Ren, A Dorn, J Ullrich, L R Hargreaves, B Lohmann, D S Slaughter, J P Sullivan, J C Lower and S J Buckman Conference Object Magnetic Island ren The University of Adelaide: Digital Library Magnetic Island ENVELOPE(77.909,77.909,-68.543,-68.543) Queensland Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) Sullivan ENVELOPE(-63.817,-63.817,-69.650,-69.650) Journal of Physics: Conference Series 262 012047 |
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Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
description |
12th International Workshop on Slow Positron Beam Techniques (SLOPOS12), 1–6 August 2010, Magnetic Island, North Queensland, Australia Positron impact ionization of helium is studied with fully resolved momentum vectors of all continuum particles. An imaging multi-particle momentum spectrometer (reaction microscope) detecting all final state particles over the full solid angle was applied. This apparatus was connected to the NEPOMUC facility delivering intense positron beams tuneable over a large energy range with good beam quality. At 80 eV impact energy about 5000 triple coincidence events were collected. Cross sections as function of the longitudinal particle momentum show strong differences compared to respective electron impact ionization data most likely originating from the reversed post collision interaction in both cases. Calculations using the 3 Coulomb wavefunction method show clear discrepancies from the experimental results. T Pflüger, M Holzwarth, A Senftleben, X Ren, A Dorn, J Ullrich, L R Hargreaves, B Lohmann, D S Slaughter, J P Sullivan, J C Lower and S J Buckman |
author2 |
School of Chemistry and Physics International Workshop on Slow Positron Beam Techniques (12th : 2010 : Magnetic Island, Australia) |
format |
Conference Object |
author |
Pfluger, T. Holzwarth, M. Senftleben, A. Ren, X. N. Dorn, A. Ullrich, J. Hargreaves, Leigh Randall Lohmann, Birgit Slaughter, D. S. Sullivan, J. P. Lower, J. Buckman, Stephen J. |
spellingShingle |
Pfluger, T. Holzwarth, M. Senftleben, A. Ren, X. N. Dorn, A. Ullrich, J. Hargreaves, Leigh Randall Lohmann, Birgit Slaughter, D. S. Sullivan, J. P. Lower, J. Buckman, Stephen J. Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility |
author_facet |
Pfluger, T. Holzwarth, M. Senftleben, A. Ren, X. N. Dorn, A. Ullrich, J. Hargreaves, Leigh Randall Lohmann, Birgit Slaughter, D. S. Sullivan, J. P. Lower, J. Buckman, Stephen J. |
author_sort |
Pfluger, T. |
title |
Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility |
title_short |
Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility |
title_full |
Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility |
title_fullStr |
Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility |
title_full_unstemmed |
Kinematically complete experiments for positron-impact ionization of helium atoms at the NEPOMUC facility |
title_sort |
kinematically complete experiments for positron-impact ionization of helium atoms at the nepomuc facility |
publisher |
Institute of Physics Publishing |
publishDate |
2011 |
url |
http://hdl.handle.net/2440/80293 https://doi.org/10.1088/1742-6596/262/1/012047 |
long_lat |
ENVELOPE(77.909,77.909,-68.543,-68.543) ENVELOPE(-85.633,-85.633,-78.617,-78.617) ENVELOPE(-63.817,-63.817,-69.650,-69.650) |
geographic |
Magnetic Island Queensland Slaughter Sullivan |
geographic_facet |
Magnetic Island Queensland Slaughter Sullivan |
genre |
Magnetic Island ren |
genre_facet |
Magnetic Island ren |
op_relation |
Journal of Physics: Conference Series, 2011; 262:012047 1742-6588 http://hdl.handle.net/2440/80293 doi:10.1088/1742-6596/262/1/012047 |
op_rights |
Copyright status unknown |
op_doi |
https://doi.org/10.1088/1742-6596/262/1/012047 |
container_title |
Journal of Physics: Conference Series |
container_volume |
262 |
container_start_page |
012047 |
_version_ |
1766244274962169856 |