Bonn 2025 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 20: Poster – Molecular Spectroscopy and Dynamics
MO 20.15: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
3D Time Resolved Photoelectron Spectroscopy on Carbondisulfide — •Marvin Krupp1, Scott Goudreau2, Andrey Boguslavskiy2, Jean-Luc Bégin2, and Albert Stolow2 — 1Institute of Physics, University of Rostock, 18059 Rostock, Germany — 2Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
Time-resolved photoelectron spectroscopy (TRPES) is a versatile probe of ultrafast dynamics in molecules and has been widely used in recent years to study non-adiabatic dynamics in numerous systems. Here, the 2D photoelectron velocity map imaging (VMI) technique is commonly employed in gas-phase molecular spectroscopy and dynamics investigations due to its ability to efficiently extract photoelectron spectra and angular distributions in a single experiment. However, the standard technique is limited to specific light-source polarization geometries. This has led to significant interest in the development of 3D VMI techniques, which are capable of measuring individual electron positions and arrival times, obtaining the full 3D distribution without the need for inversion, forward-convolution, or tomographic reconstruction approaches. Time resolved photonelectron spectra of the 1B2 (1Σu+ )-state of CS2 at pump wavelengths in the region of 200 nm have been previously studied and indicate that the lifetime of the decay is dependent on the relative laser polarisation geometry. In this work, we present the first results employing the new 3D VMI technique on CS2 and comparing it with the previous 2D VMI study.
Keywords: Ultrafast spectroscopy; time resolved photoenergy spectroscopy; molecular physics; nonadiabatic systems; 3 dimensional velocity map imaging