Stuttgart 2012 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 21: Poster 3: Cluster, Collisions, Energy Transfer, Photochemistry, Spectroscopy in He-Droplets
MO 21.16: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.IV
Double-Auger Emission of Carbon Monoxide following Core-Excitation and Ionization — •Florian Trinter1, Markus S. Schöffler1, Till Jahnke1, Irina A. Bocharova2, Arno Vredenborg1, Felix P. Sturm2, Nadine Neumann1, Kyra Cole1, Joshua B. Williams4, Marc Simon3, Allen Landers4, Thorsten Weber2, Horst Schmidt-Böcking1, and Reinhard Dörner1 — 1Institut für Kernphysik, Goethe-Universität Frankfurt am Main, D-60438 Frankfurt, Germany — 2Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA — 3Physics Department, Auburn University, Auburn, Alabama 36849, USA — 4Laboratoire de Chimie Physique Matière et Rayonnement, UPMC Université Paris 06, F-75005 Paris, France
We have studied double Auger decay after C1s → 2 π * core-level photo excitation (287.4 eV photons) and after ionization (306 eV) using synchrotron radiation in gas phase carbon monoxide. In this experiment the aim is to understand the dissociation pathways during the Auger decay and the photo-electron valence-electron correlation. This is a fundamental correlation yet unexplored, which plays an important role in the understanding of the energy-bond-length correlation of the shape resonance in chemical compounds. Moreover, we want to investigate the role of the initial and final state correlation as well as post collision interaction effects in the emission patterns of the outgoing electrons and thus hunt for a breakdown of the widely accepted 2-step mechanism in small molecules. New results especially on photo electron and Auger electron angular distributions will be presented and discussed.