Electron-impact dissociation ofXH2+(X=B, C, N, O, F): Absolute cross sections for production ofXH+andX+fragment ions
| Autor: | Mark E. Bannister, Richard D. Thomas, Vitali Zhaunerchyk, Michael Fogle, S. H. M. Deng, C. R. Vane, E. M. Bahati |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Physical Review A. 82 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.82.042720 |
| Popis: | Absolute cross sections for electron-impact dissociation of XH{sub 2}{sup +} (X= B, C, N, O, F) producing XH{sup +} and X{sup +} ion fragments were measured in the 3- to 100-eV range using a crossed-electron-ion beams technique. Dissociative excitation of BD{sub 2}{sup +} and CH{sub 2}{sup +} producing B{sup +} and C{sup +}, respectively, show a propensity toward a two-body dissociation while the remaining species all tend to show a three-body dissociation dynamic. The BD{sup +} and CH{sup +} dissociative excitation channels show a large resonant-type contribution to the cross sections at {approx}10 eV. For the X{sup +} fragment ion production cross sections, a clear dependence on the threshold energy, as it relates to the rate of rise in the cross section above threshold, is observed. |
| Databáze: | OpenAIRE |
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