Electronic transitions of jet-cooled SiC2, Si2Cn (n=1-3), Si3Cn (n=1,2), and SiC6H4 between 250 and 710 nm

Abstract

Electronic transitions of the title molecules were measured between 250 and 710 nm using a mass-resolved 1+1' resonant two-photon ionization technique at a resolution of 0.1 nm. Calculations at the B3LYP/aug-cc-pVQZ level of theory support the analyses. Because of their spectral properties, SiC${}_2$, linear Si${}_2$C${}_2$, Si${}_3$C, and SiC${}_6$H${}_4$ are interesting target species for astronomical searches in the visible spectral region. Of special relevance is the Si--C${}_2$--Si chain, which features a prominent band at 516.4 nm of a strong transition ($f=0.25$). This band and one from SiC${}_6$H${}_4$ at 445.3 nm were also investigated at higher resolution (0.002 nm).

15 pages, 9 figures, 5 Tables

References in corpus (1)

• A Catalog of Diffuse Interstellar Bands in the Spectrum of HD 204827

Cited by in corpus (1)

• The Significant Role of Hydrogen in the Formation of Silicon Carbide in Evolved Stars