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Berlin 2005 – scientific programme

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MO: Molekülphysik

MO 13: He and Molecular Clusters

MO 13.4: Talk

Friday, March 4, 2005, 15:15–15:30, HU 2097

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 Langer21Fritz-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

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