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

Autor:	W. L. Barclay, Jon T. Hougen, L. M. Ziurys, Isabelle Kleiner, M. A. Anderson
Rok vydání:	1993
Předmět:	Physics Absorption spectroscopy Space and Planetary Science Excited state Molecular cloud Spectrum (functional analysis) Infrared spectroscopy Astronomy and Astrophysics Millimeter Atomic physics Symmetry (physics) Spectral line
Zdroj:	The Astrophysical Journal Supplement Series. 89:221
ISSN:	1538-4365 0067-0049
DOI:	10.1086/191845
Popis:	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 (upsilon(sub t) = 0) and first excited (upsilon(sub t) = 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 nu(sub obs) - nu(sub calc) less than or approximately 50 kHz for both ground and upsilon(sub t) = 1 state. These newly measured rest frequencies should aid in the identification of interstellar CH3CHO and in spectral line assignments for millimeter-band scans.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13795b78ffe87f788462653239d266de https://doi.org/10.1086/191845 Zobrazit plný text záznamu