Laboratory microwave spectroscopy of the vibrational satellites for the nu7 and 2nu7 states of C4H and their astronomical identification

Details Laboratory microwave spectroscopy of the vibrational satellites for the nu7 and 2nu7 states of C4H and their astronomical identification Laboratory microwave spectroscopy of the vibrational satellites for the nu7 and 2nu7 states of C4H and their astronomical identification

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323l.149y&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 323, Dec. 15, 1987, p. L149-L153. Research supporte

Astronomy and Astrophysics

Astronomy

35

Astronomical Spectroscopy, Electron Transitions, Free Radicals, Microwave Spectra, Spin-Orbit Interactions, Vibrational Spectra, Gas Mixtures, Ground State, Hydrocarbons, Radio Astronomy

Scientific paper

The rotational transitions of the C4H radical (X2Σ+) in the lowest bending state, ν7, and its overtone state [2ν7, l = 0(Σ) and 2(Δ)] were observed by laboratory microwave spectroscopy and were analyzed to determine the molecular constants. Based on the observed and calculated frequencies, 22 previously unidentified lines in IRC +10216 are assigned to transitions in the ν7 state. Furthermore, the series of line doublets recently detected by Guélin et al. toward IRC +10216 is definitely assigned to transitions in the 2ν7(Σ) state.

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