Rotational spectra of CF+ and 13CF+: accurate rest frequencies and spectroscopic parameters

Details Rotational spectra of CF+ and 13CF+: accurate rest frequencies and spectroscopic parameters Rotational spectra of CF+ and 13CF+: accurate rest frequencies and spectroscopic parameters

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...509a...1c&link_type=abstract

Astronomy and Astrophysics, Volume 509, id.A1

Astronomy and Astrophysics

Astrophysics

1

Molecular Data, Methods: Laboratory, Methods: Data Analysis, Techniques: Spectroscopic, Ism: Molecules, Radio Lines: Ism

Scientific paper

Context. The astrophysical relevance of the fluoromethylidynium ion and its importance for the interstellar chemistry of fluorine motivated the present laboratory spectroscopic investigation of both 12CF+ and the corresponding 13C-containing isotopologue, 13CF+. Aims: This investigation has been carried out to provide accurate rest frequencies for future (radioastronomical) observations, to improve the accuracy of the values for the spectroscopic parameters available in the literature for CF+, and to provide them for the first time for 13CF+. Methods: Rotational spectra of CF+ and 13CF+ were recorded in the millimeter- and submillimeter-wave frequency ranges. Their investigation was supplemented by high-level quantum-chemical computations using state-of-the-art coupled-cluster techniques. Results: We report the most accurate ground-state rotational parameters available so far for CF+ and 13CF+. Conclusions: The ground-state rotational parameters as well as the rest frequencies of 13CF+ will be useful for future observational purposes with the aim of improving the knowledge of fluorine interstellar chemistry.

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