Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 19: Poster 3
MO 19.5: Poster
Donnerstag, 17. März 2022, 16:30–18:30, P
Detailed investigation of unexpected photoelectron spectra via angle resolved spectroscopy of Copper clusters — •Lukas Weise and Bernd v. Issendorff — Physikalisches Institut der Albert-Ludwigs-Universität Freiburg
Angle resolved spectroscopy provides an important test of the theoretical description of clusters since these spectra carry more information than the bare energy levels. The anisotropy of photoelectron spectra for example depends on the angular momentum state.
The cluster anions are produced in a magnetron sputter source, cooled to 7 K and enter a time-of-flight spectrometer for mass measurement and selection. Afterwards electrons are detached by linear polarised laser light and projected onto a MCP detector in a velocity map imaging setup.
The presented analysis utilises the additional information from angle resolved spectroscopy to gain a better understanding of photoelectron spectra, that have not been predicted by theory so far. For Cu91− an electronic shell closing is expected. Previous experiments [1,2], however, have shown an additional peak associated to the occupation of the next orbital, that would be predicted for Cu92−. Based on the angle resolved measurements an f-type character can be assigned to the additional state.
[1] O. Kostko, PhD thesis, Albert-Ludwigs-Universität Freiburg (2007).
[2] M. Knickelbein, Chemical Physics Letters 192, 1 (1992), 129-134.