Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5416153 | Journal of Molecular Spectroscopy | 2006 | 10 Pages |
Abstract
Extensive experiments on the KÂ =Â 3 component of the JÂ =Â 12-11 rotational transition of acetonitrile CH3C14N, located near 220.7Â GHz, were performed at different temperatures in the range 235-350Â K. They allow determining the N2-, H2-, and He-broadening coefficients, as well as their temperature dependences. More specific measurements on all the K-components of the involved transition perturbed by N2 at 303Â K allow to point out a clear decreasing of the broadening coefficient with increasing K. Narrowing effects are clearly observed, and experimental lines were analysed both with Voigt and speed dependent Voigt profiles; but no exhaustive lineshape study was carried out. All the experimental parameters are compared with results derived from a semiclassical calculation of collisional interactions, including electrostatic, induction, and dispersion energy contributions.
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Authors
Jean-Marcel Colmont, François Rohart, Georges Wlodarczak, Jean-Pierre Bouanich,