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Laboratory measurement of the millimeter and submillimeter wave spectrum of C2H3(+)
Bogey, M.; Cordonnier, M.; Demuynck, C.; Destombes, J. L.
AA(Lille I, Univ., Villeneuve-d'Ascq, France), AB(Lille I, Univ., Villeneuve-d'Ascq, France), AC(Lille I, Univ., Villeneuve-d'Ascq, France), AD(Lille I, Univ., Villeneuve-d'Ascq, France)
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 399, no. 1, p. L103-L105. (ApJL Homepage)
Publication Date:
Atomic and Molecular Physics
NASA/STI Keywords:
Acetylene, Millimeter Waves, Molecular Ions, Molecular Spectroscopy, Radio Astronomy, Submillimeter Waves, Argon, Cryogenic Temperature, Glow Discharges, Hydrogen, Interstellar Matter, Magnetic Field Configurations
Bibliographic Code:


The millimeter and submillimeter wave spectrum of C2H3(+) has been observed in a negative glow discharge extended by an axial magnetic field, in a mixture of C2H2, H2, and Ar cooled at liquid nitrogen temperature. Seventeen lines have been measured in the 195-470 GHz frequency range. They fit very well with the combination differences derived from the IR spectrum, using a conventional S-reduced Watson Hamiltonian. No tunneling splitting has been observed. Line frequencies of astrophysical interest have been measured or predicted with an accuracy convenient for radio-astronomical searches.

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