Submillimeter - wave spectrum of the ethynyl radical , CCH , up to 1 THz
نویسنده
چکیده
The N = 7 ← 6 to 11 ← 10 pure rotational transitions of CCH, X2Σ+, were measured in the laboratory between 611 and 961 GHz. The radical was produced in a dc glow discharge of a mixture of helium and acetylene. The electron spin-rotation splitting was resolved. The new line frequencies were fit together with previously published data, providing greatly improved spectroscopic constants, such as B = 43 647.529 01 (115) MHz, as well as precise rest frequencies well beyond 1 THz.
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