The laboratory spectrum of acetaldehyde at 1 millimeter (230-325 GHz)

Details The laboratory spectrum of acetaldehyde at 1 millimeter (230-325 GHz) The laboratory spectrum of acetaldehyde at 1 millimeter (230-325 GHz)

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...89..221b&link_type=abstract

The Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 89, no. 1, p. 221-226

Astronomy and Astrophysics

Astrophysics

5

Infrared Spectra, Molecular Clouds, Radio Spectra, Acetaldehyde, Frequencies, Line Spectra

Scientific paper

The rotational spectrum of acetaldehyde (CH3CHO) in the frequency range 230-325 GHz has been measured in the laboratory using millimeter/submillimeter direct absorption spectroscopy. Over 250 transition frequencies are presented for this molecule for both A and E symmetry species in its ground (upsilont = 0) and first excited (upsilont = 1) torsional state, with experimental uncertainties of +/- 50 kHz. The data were fitted with a model involving an internal rotation potential function, which typically reproduces the measured frequencies to nuobs - nucalc less than or approximately 50 kHz for both ground and upsilont = 1 state. These newly measured rest frequencies should aid in the identification of interstellar CH3CHO and in spectral line assignments for millimeter-band scans.

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