Berlin 2014 – scientific programme

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MO: Fachverband Molekülphysik

MO 5: Posters 1: Electronic Spectroscopy, Photochemistry, Femtosecond Spectroscopy

MO 5.9: Poster

Monday, March 17, 2014, 16:30–18:30, Spree-Palais

Vibrationally Resolved Decay Width of Interatomic Coulombic Decay in HeNe — •Florian Trinter¹, Joshua B. Williams¹, Miriam Weller¹, Markus Waitz¹, Martin Pitzer¹, Jörg Voigtsberger¹, Carl Schober¹, Gregor Kastirke¹, Christian Müller¹, Christoph Goihl¹, Phillip Burzynski¹, Florian Wiegandt¹, Robert Wallauer¹, Anton Kalinin¹, Lothar Ph. H. Schmidt¹, Markus S. Schöffler¹, Ying-Chih Chiang², Kirill Gokhberg², Till Jahnke¹, and Reinhard Dörner¹ — ¹Institut für Kernphysik, J. W. Goethe-Universität, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, Germany — ²Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany

We investigate the ionization of HeNe from below the He 1s3p excitation to the He ionization threshold. We observe HeNe⁺ ions with an enhancement by more than a factor of 60 when the He side couples resonantly to the radiation field. These ions are an experimental proof of a two-center resonant photoionization mechanism predicted by Najjari et al. [Phys. Rev. Lett. 105, 153002 (2010)]. Furthermore, our data provide electronic and vibrational state resolved decay widths of interatomic Coulombic decay in HeNe dimers. We find that the interatomic Coulombic decay lifetime strongly increases with increasing vibrational state.