SAMOP 2023 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 6: Poster I

MO 6.3: Poster

Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof

Photoemission delays in similiarly sized molecules — •Maximilian Forster, Christian Schröder, Maximilian Pollanka, Pascal Scigalla, Michael Mittermair, Andreas Duensing, and Reinhard Kienberger — Chair for laser and x-ray physics, E11, Technische Universität München, Germany

In the gas phase we measure the relative photoemission delay between the Helium 1s and the Iodine 4d state in Iodobenzene and Iodocyclohexane. This allows us to determine the absolute timing of the Iodine 4d photoelectrons.

Iodine as a substituent was chosen for its giant resonance and therefore high cross section in the I4d state which is expected to be unaffected by its chemical surrounding. Measurements on a variety of different iodoalkanes have shown an unexpected variation of the I4d delay for different molecules, with no clear correlation with the molecular size, showing that the chemical environment may play a role in forming the observed photoemission delay. Therefore performing measurements on molecules with similar size and yet significant differences in their bonding structure yields further information about the possible underlying effects causing the delay.