A photoelectron spectroscopy study of the valence shell photoionization dynamics of acetylene
| Autor: | M A MacDonald, L. Karlsson, D.M.P. Holland, Björn Wannberg, M. A. Hayes |
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| Rok vydání: | 1999 |
| Předmět: |
Shape resonance
Valence (chemistry) Radiation Chemistry Ionic bonding Photoelectron photoion coincidence spectroscopy Photoionization Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials X-ray photoelectron spectroscopy Autoionization Physics::Atomic and Molecular Clusters Atomic physics Physical and Theoretical Chemistry Valence electron Spectroscopy |
| Zdroj: | Journal of Electron Spectroscopy and Related Phenomena. 104:245-255 |
| ISSN: | 0368-2048 |
| DOI: | 10.1016/s0368-2048(99)00024-9 |
| Popis: | The valence shell photoionization dynamics of acetylene were studied in the photon energy range 13–140 eV using photoelectron spectroscopy and synchrotron radiation. Photoelectron angular distributions and branching ratios were determined for the X 2Πu, A 2 Σ g + , B 2 Σ u + , C 2 Σ g + single-hole ionic states and for inner valence correlation states. An interpretation of the experimental results was carried out based upon previous theoretical predictions, and it appears that the photoionization dynamics are being strongly affected by shape resonance phenomena. The photoelectron asymmetry parameters associated with the A 2 Σ g + and the C 2 Σ g + ionic states provide the first experimental confirmation of the predicted σu continuum shape resonance. |
| Databáze: | OpenAIRE |
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