SAMOP 2021 – scientific programme
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MO: Fachverband Molekülphysik
MO 2: Cluster & Complexes
MO 2.1: Talk
Monday, September 20, 2021, 14:00–14:15, H2
SinOm+ - Optical Absorption and Photodissociation Properties — •Taarna Studemund, Marko Förstel, Kai Pollow, Robert G. Radloff, Lars Dahllöf, Julian Voß, and Otto Dopfer — Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Deutschland
The origin as well as evolutionary formation mechanisms of stars and solar systems like our own are still poorly understood. Therefore, it is essential to gain a better understanding of interstellar dust, as it is a major actor in this process. So far, it is known that such dust contains µm-sized silicate particles. On the other hand, the only molecular species that has been found in the interstellar matter (ISM) which could be a direct precursor to silicate dust is SiO [1].
To this end we present both, experimental data and quantum chemical calculations, that help to understand the dissociation and absorption behavior of possible intermediate silcon-oxide species. The ions under investigation were generated in a laser vaporization source, mass-selected and photodissociated [2]. The resulting absorption spectra are compared to TD-DFT calculations and discussed in an astrophysical context.
[1] R. Wilson et al., 1971, Astrophys. J. 167, L97
[2] M. Förstel et al., Rev. Sci. Instrum., 2017, 88, 123110.