Laboratory detection of a new free radical C4S (3Sigma-)

Details Laboratory detection of a new free radical C4S (3Sigma-) Laboratory detection of a new free radical C4S (3Sigma-)

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408l.113h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 408, no. 2, p. L113-L115.

Astronomy and Astrophysics

Astrophysics

14

Carbon, Free Radicals, Interstellar Gas, Organic Sulfur Compounds, Fabry-Perot Spectrometers, Fourier Transformation, Ground State, Microwave Spectrometers

Scientific paper

A free radical C4S has been detected for the first time by using a Fabry-Perot-type Fourier-transform microwave spectrometer combined with a pulsed discharge nozzle. Rotationally cooled (about 1-2 K) C4S in its ground electronic state (3Sigma-) has been produced by a discharge in a supersonic free jet of Ar-diluted samples of C2H2 and CS2. The observed spectrum of C4S in the 5-24 GHz region was analyzed to determine the rotational constant and the spin-spin interaction constant. Toward the astronomical detection, transition frequencies of C4S in the millimeter-wave region are tabulated.

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