Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Collisions, scattering and recombination

A 33.6: Vortrag

Donnerstag, 26. März 2015, 15:45–16:00, C/kHS

Atomic-scale imaging of molecular bonds with laser-induced electron diffraction — •Benjamin Wolter1, Michael G. Pullen1, Anh-Thu Le2, Matthias Baudisch1, Michele Sclafani1, Hugo Pires1, Arne Senftleben3, Claus Dieter Schröter4, Joachim Ullrich4,5, Robert Moshammer4, Chii-Dong Lin2, and Jens Biegert1,61ICFO - Institut de Ciències Fotòniques, Mediterranean Technology Park, Castelldefels (Barcelona), Spain — 2J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas, USA — 3Universität Kassel, Institut für Physik and CINSaT, Kassel, Germany — 4Max - Planck - Institut für Kernphysik, Heidelberg, Germany — 5Physikalisch - Technische Bundesanstalt, Braunschweig, Germany — 6ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain

Dynamic imaging of molecular dynamics is one of the grand challenges of science as it requires sub-Ångström spatial and few femtosecond temporal resolutions. These demands are fulfilled by laser-induced electron diffraction (LIED), where a molecule is structurally probed with its own returning electron after tunnel ionization induced by a strong mid-IR laser field. Here, we present the retrieval of multiple bond lengths from polyatomic molecules by simultaneously measuring the C-C and C-H bond lengths of aligned acetylene. Our approach is based on the combination of an ultrafast 160 kHz mid-IR source with full 3D electron-ion coincidence detection towards investigating ultrafast processes like e.g. dissociation or proton migration.

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