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The ground state rotational spectrum of the fluorosulfate radical

TitleThe ground state rotational spectrum of the fluorosulfate radical
Publication TypeJournal Article
Year of Publication2009
AuthorsKolesnikova, L, Varga, J, Striteska, LN, Beckers, H, Willner, H, Aubke, F, Urban, S
JournalJournal of Chemical Physics
Volume130
Pagination9
Date PublishedMay
Type of ArticleArticle
ISBN Number0021-9606
KeywordsASSIGNMENTS, BANDS, CLASSIFICATION, fluorine compounds, free radical reactions, ground states, HYPERFINE, LASER EXCITATION, lifetimes, millimetre wave spectra, molecular configurations, radiative, rotational states, STRUCTURE, SYMMETRIC-TOP MOLECULES, SYSTEM, vibronic states
Abstract

The rotational spectra of the fluorosulfate (FSO3 center dot) molecular radical in its vibronic ground state were measured in the millimeter-wave region and analyzed in detail using the matrix elements of the rotational, fine, and hyperfine Hamiltonian terms. The analysis of the assigned transition frequencies made it possible to derive very precise values of the rotational, centrifugal distortion and fine structure constants and to confirm the C-3v molecular symmetry of the vibronic ground state unambiguously. In addition, an effective parameter of the "A(1)-A(2) splitting" was determined. The rotational transitions of the FSO3 center dot free radical were observed, identified, and analyzed for the first time.

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