Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 7: Poster: Spectroscopy

MO 7.3: Poster

Dienstag, 12. März 2024, 17:00–19:00, Tent C

Towards photodetachment spectroscopic studies of deprotonated naphthalene. — •Michael Hauck, Sruthi Purushu Melath, Christine Lochmann, Robert Wild, Katrin Erath-Dulitz, and Roland Wester — Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25/3, 6020 Innsbruck, Austria

Polycyclic aromatic hydrocarbon (PAH) molecules are important in the study of interstellar chemistry. The discovery of benzonitrile in the molecular cloud TMC-1 hints at the existence of larger aromatic molecules which might explain still unassigned infrared bands [1,2]. We are interested in the spectroscopic study of deprotonated naphthalene (C₁₀H₇⁻). Photoelectron spectroscopic studies of this molecule were performed, which found the electron affinities of two possible isomers [3].

Here we present a 2D tomography photodetachment scan of deprotonated naphthalene in our cryogenic 16 pole trap, which we measure in order to extract the value of the absolute photodetachment cross section. We further plan to examine the behaviour of the cross section near threshold and measure the electron affinity of the molecule.

[1] J. Gao, G. Berden and J. Oomens, Ap. J. 787, 170 (2014)

[2] B. A. McGuire et al., Science 359, 202 (2018)

[3] M. L. Weichman, J. B. Kim and D. M. Neumark, J. Phys. Chem. A 119, 6140 (2015)

Keywords: spectroscopy; PAH; photodetachment; ion trap