Cooke, DA;
Murtagh, DJ;
Laricchia, G;
(2010)
Simultaneous Ionization and Excitation of Molecules by Positron Impact.
PHYS REV LETT
, 104
(7)
, Article 073201. 10.1103/PhysRevLett.104.073201.
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Abstract
Cross sections for ionization excitation of molecules by positron impact have been measured for the first time by scattering a positron beam from CO2 and N-2. The cross sections have been observed to exceed those for electron impact by up to a factor of similar to 3 for CO2 and similar to 5 for N-2. The enhancement arises primarily via positronium formation. The cross sections account for up to similar to 12% and 20% of the total cross sections for positron scattering from N-2 and CO2, respectively.
| Type: | Article |
|---|---|
| Title: | Simultaneous Ionization and Excitation of Molecules by Positron Impact |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.104.073201 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.104.073201 |
| Language: | English |
| Additional information: | © 2010 The American Physical Society |
| Keywords: | EMISSION CROSS-SECTIONS, ELECTRON-IMPACT, DISSOCIATIVE IONIZATION, OSCILLATOR-STRENGTHS, CONTINUUM PHOTOABSORPTION, CARBON-DIOXIDE, CO2, SCATTERING, COLLISIONS, THRESHOLD |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/115597 |
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