Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 16: Atomic Clusters and Cold Atoms II
A 16.8: Fachvortrag
Mittwoch, 9. März 2005, 12:00–12:15, HU 3075
Solid State Valence Electron Distributions of C70 examined by photoelectron intensity variations — •Sanja Korica1, Axel Reinköster1, Daniel Rolles1, Jens Viefhaus1, Markus Braune1, Uwe Becker1, and Burkhard Langer2 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany — 2Max-Born-Institut, Max-Born-Str. 2a, 1248 Berlin, Germany
We have performed high resolution measurements of emitted photoelectrons from the valence shell of solid C70 to derive branching ratios and partial cross sections. Our PES results give evidence for photon energy dependent oscillations in the partial photoionization cross sections of the two highest occupied molecular orbitals HOMO and HOMO-1. The results are compared with advanced ab initio theoretical calculations [1] based on the local density approximation (LDA). The characteristic oscillations are analysed in terms of geometrical properties, the analysis is based on the Fourier transform of the cross section oscilalations. We compare our results for amorphous condensed phase C70 with corresponding measurements of the free molecules.
[1] P. Decleva, private communication