SAMOP 2021 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 7: Poster 1
MO 7.12: Poster
Donnerstag, 23. September 2021, 17:30–19:30, P
Photofragmentation behaviour of small cationic silicon-oxide clusters — •Julian Voss, Taarna Studemund, Marko Förstel, and Otto Dopfer — Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Deutschland
Interstellar dust plays a major role in the formation processes of stars and solar systems. The formation mechanisms of this dust are, however, still poorly understood. One molecular species found in interstellar matter is SiO [1] and we try to understand how and if such small Si and O containing molecules can play a role in the formation of large µm-sized silicate particles, a major component of interstellar dust [2].
In this study we focus on silicon-oxide species with two oxygen atoms per molecule. The investigated cations are generated by a laser vaporization source and their mass spectra are examined [3]. We furthermore gain insight into the molecular structure and the electronic properties of SinO2+s by measuring their photon energy dependent photodissociation behaviour which is compared to quantum chemical TD-DFT calculations.
[1] R. Wilson et al., 1971, Astrophys. J., 167, L97
[2] B. A. Sargent et al., 2009, ApJ., 690, 1193
[3] M. Förstel et al., 2017, Rev. Sci. Instrum., 88, 123110