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MO: Fachverband Molekülphysik
MO 3: Chiral Molecules
MO 3.8: Vortrag
Montag, 9. März 2020, 16:00–16:15, f102
High-resolution resonance-enhanced multiphoton photoelectron circular dichroism — Alexander Kastner1, Greta Koumarianou2, Pavle Glodic2, Peter C. Samartzis2, Nicolas Ladda1, Simon T. Ranecky1, Sudheendran Vasudevan1, Constantin Witte1, Hendrike Braun1, Han-Gyeol Lee1, •Arne Senftleben1, Robert Berger3, G. Barratt Park4,5, Tim Schäfer4,5, and Thomas Baumert1 — 1Universität Kassel, D-34132 Kassel — 2Institute of Electronic Structure and Lasers, FORTH, 71110 Heraklion, Greece — 3Philipps-Universitat Marburg, D-35032 Marburg — 4Georg-August-Universität Göttingen, D-37077 Göttingen — 5MPI for Biophysical Chemistry, D-37077 Göttingen
Photoelectron circular dichroism (PECD) is a highly sensitive enantiospecific spectroscopy for studying chiral molecules in the gas phase using either single-photon ionization or multiphoton ionization. In the short pulse limit investigated with femtosecond lasers, resonance-enhanced multiphoton ionization (REMPI) is rather instantaneous while exciting several intermediate states simultaneously. In contrast, vibrational resolution in the REMPI spectrum can be achieved using nanosecond lasers. In this work, we follow the high-resolution approach using a tunable narrow-band nanosecond laser to measure REMPI-PECD through distinct vibrational levels in the intermediate 3s and 3p Rydberg states of fenchone. We observe the PECD to be largely independent of the vibrational level.