Laboratory detection of the negative molecular ion CCH^-

Details Laboratory detection of the negative molecular ion CCH^- Laboratory detection of the negative molecular ion CCH^-

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...464l..33b&link_type=abstract

Astronomy and Astrophysics, Volume 464, Issue 3, March IV 2007, pp.L33-L36

Astronomy and Astrophysics

Astrophysics

16

Line: Identification, Molecular Data, Astrochemistry, Methods: Laboratory, Ism: Molecules, Radio Lines: Ism

Scientific paper

Aims:This paper reports the laboratory detection of the rotational spectrum of the acetylide anion, CCH^-. Methods: Five successive rotational transitions have been measured to high accuracy in a dc discharge with a free space millimeter-wave spectrometer in the frequency range 83-417 GHz. Results: Precise spectroscopic constants have been obtained for CCH- and transition rest frequencies can now be calculated to better than 1 km s-1 in equivalent radial velocity far into the terahertz region, allowing for deep astronomical searches for this anion in space. The highly stable and fairly polar CCH- anion is a likely candidate for radio astronomical detection, its neutral analogue CCH being among one of the most abundant molecules in a wide variety of astrophysical sources.

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