The Electronic Spectrum of Si2

The optical spectrum of Si2 + is presented. The two electronic band systems observed near 430 and 270 nm correspond to the two lowest optically allowed transitions of Si2 + assigned to 4Σu –(I) ← X4Σg – and 4Σu –(II) ← X4Σg –. The spectra were measured via photodissociation spectroscopy of mass-sele...

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Published in:The journal of physical chemistry letters 2022-08, Vol.13 (33), p.7624-7628
Main Authors: Studemund, Taarna, Pollow, Kai, Verhoeven, Sophie, Mickein, Emil, Dopfer, Otto, Förstel, Marko
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Language:English
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Physical Insights into Materials and Molecular Properties
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creator Studemund, Taarna
Pollow, Kai
Verhoeven, Sophie
Mickein, Emil
Dopfer, Otto
Förstel, Marko
description The optical spectrum of Si2 + is presented. The two electronic band systems observed near 430 and 270 nm correspond to the two lowest optically allowed transitions of Si2 + assigned to 4Σu –(I) ← X4Σg – and 4Σu –(II) ← X4Σg –. The spectra were measured via photodissociation spectroscopy of mass-selected ions at the level of vibrational resolution, and the determined spectroscopic constants provide detailed information about the geometric and electronic structure, establishing molecular constants of this fundamental diatomic cation that enable astrophysical detection on, for example, hot rocky super-Earth-like exoplanets.
doi_str_mv 10.1021/acs.jpclett.2c02200
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title The Electronic Spectrum of Si2
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