Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 5: Posters Tuesday (Photoionisation, Multi Photon Processes)
A 5.10: Poster
Dienstag, 3. April 2001, 12:30–15:00, AT3
2p photoemission of 3d transition metal atoms: manganese and chromium — •Michael Martins1, Philippe Wernet2, Joachim Schulz2, Bernd Sonntag2, Kai Godehusen3, Bernhard Obst3, and Peter Zimmermann3 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany — 2II. Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany — 3Institut für Atomare und Analytische Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
The 2p photoemission of the 3d transition metals manganese and chromium has been studied using synchrotron radiation and Hartree-Fock calculations including correlation effects and relativistic corrections.
Multiplet splitting and valence shell re-coupling in the core excited state give rise to numerous main and satellite lines. The theoretical spectra shows excellent agreement with the experimental data and recent theoretical calculations using the MCDF method by Bagus et al. [1] for MnO. The atomic photoelectron spectra of the metals exhibit the same structure as the compounds and thin films and present the importance of intra-atomic effects on the electronic structure of solid state systems. Furthermore it can be shown by comparing the atomic and ionic photoelectron spectra, that the 4s electrons in manganese and chromium have a neglectable effect on the electronic structure of the atoms and condensed systems.
[1] P. S. Bagus et al., Phys. Rev. Lett. 84, 2259 (2000)