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Title: NEW GROUND-STATE MEASUREMENTS OF ETHYL CYANIDE

The spectrum of ethyl cyanide, or propionitrile (CH{sub 3}CH{sub 2}CN), has been repeatedly observed in the interstellar medium with large column densities and surprisingly high temperatures in hot core sources. The construction of new, more sensitive, observatories accessing higher frequencies such as Herschel, ALMA, and SOFIA have made it important to extend the laboratory data for ethyl cyanide to coincide with the capabilities of the new instruments. We report extensions of the laboratory measurements of the rotational spectrum of ethyl cyanide in its ground vibrational state to 1.6 THz. A global analysis of the ground state, which includes all of the previous data and 3356 newly assigned transitions, has been fitted to within experimental error to J = 132, K = 36, using both Watson A-reduced and Watson S-reduced Hamiltonians.
Authors:
; ; ;  [1]
  1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States), E-mail: Carolyn.S.Brauer@jpl.nasa.gov
Publication Date:
OSTI Identifier:
21301599
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, Supplement Series; Journal Volume: 184; Journal Issue: 1; Other Information: DOI: 10.1088/0067-0049/184/1/133; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ASTROPHYSICS; CATALOGS; CYANIDES; GLOBAL ANALYSIS; GROUND STATES; HAMILTONIANS; SPECTRA; VIBRATIONAL STATES