SAMOP 2023 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 1: Cold Molecules (joint session MO/Q)

MO 1.6: Vortrag

Montag, 6. März 2023, 12:15–12:30, F102

Optical properties of the Si2O+ cation — •Emil Mickein, Taarna Studemund, Kai Pollow, Marko Förstel, and Otto Dopfer — Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Germany

The emission of SiO from stars is well-known and proven. Moreover, the existence of different µm-sized silicate grains in interstellar dust is observed, but the formation pathway is unknown and information concerning larger molecules and their ions is missing.
In our project we are looking for transitions of cluster and characterize them via their measured optical spectrum.
In this talk, experimental data and quantum chemical calculations on the absorption and dissociation properties of Si2O+ are presented. The spectrum of Si2O+, which are created in a laser vaporization source, was obtained by photodissociation of mass-selected Si2O+ cations in a tandem mass spectrometer. The experimental results are discussed and compared with theoretical results of TD-DFT calculations.
Significantly, our optical spectrum provides the first spectroscopic information for this simple triatomic cation.

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