N2-, H2-, and He-induced collisional broadening of the J = 24 ← 23 transition of HC3N located near 218.3 GHz at different temperatures |
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Authors: | Jean-Marcel Colmont,Franç ois Rohart,Georges Wlodarczak |
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Affiliation: | Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523-Université de Lille1, F-59655 Villeneuve d’Ascq Cedex, France |
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Abstract: | We report on experimental collisional relaxation of the J = 24 ← 23 line of HC314N, located near 218.3 GHz, induced by nitrogen, hydrogen, and helium. The measurements were carried out at selected temperatures in the 235-350 K range using a video-type spectrometer. The foreign gas broadening parameters and their temperature dependences were determined assuming Voigt lineshape profiles and the usual T−n temperature law. The experimental broadening parameters are compared with results derived using the ATC collisional formalism. |
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Keywords: | Pressure broadening Collisional relaxation Millimeter spectroscopy HC3N Cyanoacetylene |
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