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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