Berlin 2005 – wissenschaftliches Programm
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MO: Molekülphysik
MO 22: Poster I
MO 22.25: Poster
Samstag, 5. März 2005, 10:30–12:30, Poster HU
Photoexcitation and Photofragmentation of the 3d- transition metal compounds FeCl2 and FeBr2 — •Mohamed Al-Hada1, Michael Martins2, Tobias Richter1, Peter Zimmermann1, Ömer Görgülüer3, Ali Tutay3, and Mehtap Yalcinkaya3 — 1Institut für Atomare Physik und Fachdidaktik, Technische Universität Berlin,Hardenbergstraße 36, 10623 Berlin, Germany — 2Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 2276 Hamburg, Germany — 3Science Faculty, Istanbul University, 34459 Istanbul, Turkey
The atomic absorption spectrum of the 3d element Fe in the region of the 3p excitation is dominated by strong resonances (giant resonances) due to discrete transitions 3p6 3d6 to 3p5 3d7 [1]. This is caused by the large overlap of the 3p and 3d wave functions. The atomic Fe 3p photoelectron spectrum in a similar way is determined by the 3p-3d interaction resulting in a large splitting of the 3p−1 multiplet [2]. It is a challenging task to probe this interaction of an inner shell 3p hole with the 3d valence electrons for the Fe compounds FeCl2 and FeBr2 due to fragmentation processes which act as complex dominant processes in these molecules.
[1] H. Feist, M.Feldt, Ch. Gerth, M. Martins, P. Sladeczek, P. Zimmermann, P, Phys. Rev. A, 53,760 (1995) [2] K. Tiedtke, Ch. Gerth, M. Martins, P. Zimmermann Phys. Rev. A 64, 022705 (2001)