Si₃O₂⁺ - OPTICAL ABSORPTION AND PHOTODISSOCIATION PROPERTIES

Studemund, Taarna

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Description

Title

Si₃O₂⁺ - OPTICAL ABSORPTION AND PHOTODISSOCIATION PROPERTIES

Author(s)

Studemund, Taarna

Contributor(s)

• Dopfer, Otto
• Förstel, Marko
• Pollow, Kai

Issue Date

2023-06-22

Keyword(s)

Photodissociation and photochemistry

Abstract

Interstellar dust is an essential constituent in the evolution of solar systems, stars, and planets - like our Earth - but its origin and processes are still insufficiently understood. Key components of such interstellar dust are μm-sized silicates, which are mainly silicon-containing compounds, with oxygen, among others.¹ Furthermore, silicon and oxygen are the two most abundant elements in our Earth’s crust. However, only molecular SiO has been identified as a possible precursor in space and circumstellar disks yet.² Experimental data and quantum chemical calculations on larger SinOm⁺ cations are expected to provide information on further intermediate steps of the dust grain formation. Therefore, we focus on these and present the first results on the Si₃O₂⁺ molecular ion. The optical spectra are among the first spectroscopic information for SinOm⁺ cations larger than SiO⁺ and Si₂⁺.²−⁵ The electronic photodissociation spectra are obtained by photodissociation spectroscopy of mass-selected ions in a tandem mass spectrometer coupled to a laser vaporization source.⁶ The data generated by action spectroscopy are compared and interpreted with TD-DFT calculations.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122476

DOI

https://doi.org/10.15278/isms.2023.6799

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