Absolute electron-impact-ionization cross-section measurements of the halogen atoms
- 1 January 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 35 (2) , 578-584
- https://doi.org/10.1103/physreva.35.578
Abstract
Electron-impact-ionization cross sections have been measured for the halogen atoms F, Cl, Br, and I from threshold to 200 eV. The absolute accuracy is ±14%, except for F which is ±20%. The halogen cross sections have shapes similar to those of the neighboring rare gases but are greater in magnitude. Simple semiclassical formulas of electron-impact ionization are able to accurately predict the experimentally determined halogen to rare gas cross-section ratios.Keywords
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