Laboratory and astronomical detection of the deuterated ethynyl radical CCD

Details Laboratory and astronomical detection of the deuterated ethynyl radical CCD Laboratory and astronomical detection of the deuterated ethynyl radical CCD

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296l..35v&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 296, Sept. 15, 1985, p. L35-L38.

Astronomy and Astrophysics

Astrophysics

28

Deuterium Compounds, Hydrocarbons, Interstellar Chemistry, Molecular Clouds, Radicals, Cosmochemistry, Hyperfine Structure, Orion Nebula, Spectral Resolution

Scientific paper

Two rotational transitions of CCD, N = 1-2 at 144 GHz and 2-3 at 216 GHz, were detected in a laboratory glow discharge through deuterated acetylene and helium, after which one, N = 2-1, was detected toward the rich molecular cloud behind the Orion Nebula. The 144 GHz transition is a well-resolved spin doublet split by 55 MHz, the components of which contain hyperfine structure of the order of 1 MHz, so far only partially resolved. From observations toward two positions in Orion, at and near the Kleinmann-Low nebula, the column density of CCD is determined to be 1.8 x 10 to the 13th/sq cm and the isotopic ratio CCD/CCH = 0.05. CCD was not detected at two positions in TMC-1.

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