"<span Class=""roman"">si</span>_{<span Class=""roman"">n</span>}<span Class=""roman"">o</span>_{<span Class=""roman"">m</span>}^{<span Class=""roman"">+</span>} – Optical Absorption And Photodissociation Properties"

Studemund, Taarna

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https://hdl.handle.net/2142/111297 Copy

Description

Title

"si_no_m⁺ – Optical Absorption And Photodissociation Properties"

Author(s)

Studemund, Taarna

Contributor(s)

• Dopfer, Otto
• Radloff, Robert G.
• Pollow, Kai
• Dahllöf, Lars
• Förstel, Marko

Issue Date

2021-06-25

Keyword(s)

Clusters/Complexes

Abstract

Interstellar dust contains to a large extent $\mu$m-sized silicate particles. The origin and evolutionary processes of these are still poorly understood. Only one possible precursor, molecular SiO in a circumstellar disk, has been observed so far.$^{[1]}$ We present experimental data and quantum chemical calculations on the absorption and dissociation properties of small \chem{Si_nO_m^+} clusters ($n=10-12$, $m=1-2$) that are potential intermediates between the circumstellar SiO diatomic molecule and silicate grains observed in the interstellar medium. The spectra are the first optical absorption spectra of \chem{Si_nO_m^+} cations and obtained by photodissociation of mass-selected ions generated in a laser desorption source.$^{[2]}$ We compare our experimental results to TD-DFT calculations and discuss them in an astrophysical context.\\ \newline Literature: [1] R. Wilson et al., Astrophys. J., 1971, 167, L97. [2] M. Förstel et al., Rev. Sci. Instrum., 2017, 88, 123110.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111297

DOI

10.15278/isms.2021.FI10

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