Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ===== On the Detection of Pentadiynylidyne, C5H, in Space ===== The pentadiynylidyne radical in its <sup>2</sup>Π<sub>1/2</sub> lower spin component has been detected in six lines of three rotational transitions toward IRC +10216 by\\ J. Cernicharo, C. Kahane, J. Gómez-González; and M. Guélin,\\ **[[https://ui.adsabs.harvard.edu/abs/1986A%26A...164L...1C|Tentative Detection of the C<sub>5</sub>H Radical]]**,\\ //Astron. Astrophys.// **164**, L1–L4 (1986)\\ before it was actually detected in the laboratory. Confirmation came also through the observation of four lines pertaining to the <sup>2</sup>Π<sub>3/2</sub> upper spin component in the 3 mm range for which the //λ//-doubling is just not resolvable:\\ J. Cernicharo, C. Kahane, J. Gómez-González; and M. Guélin,\\ **[[https://ui.adsabs.harvard.edu/abs/1986A%26A...167L...5C|Detection of the <sup>2</sup>Π<sub>3/2</sub> State of C<sub>5</sub>H]]**,\\ //Astron. Astrophys.// **167**, L5–L7 (1986). Subsequently, it was also detected toward TMC-1 in one transition with resolved <sup>1</sup>H hyperfine splitting as well as //λ//-doubling:\\ J. Cernicharo, M. Guélin, and C. M. Walmsley,\\ **[[https://ui.adsabs.harvard.edu/abs/1987A%26A...172L...5C|Detection of the Hyperfine Structure of the C<sub>5</sub>H Radical]]**,\\ //Astron. Astrophys.// **172**, L5–L6 (1987). ---- Contributor(s): H. S. P. Müller; 05, 2007 ---- molecules/ism/c5h.txt Last modified: 2019/10/23 21:58by mueller