Experimental and theoretical study of N₂-broadened acetylene line parameters in the ν₁ + ν₃ band over a range of temperatures

摘要

N₂-broadened line widths and N₂-pressure induced line shifts have been measured for transitions in the ν₁ + ν₃ band of acetylene at seven temperatures in the range 213-333 K to obtain the temperature dependences of broadening and shift coefficients. For the room-temperature spectra the line mixing effects have been also investigated. The Voigt and hard-collision line profile models were used to retrieve the line parameters. All spectra were recorded using a 3-channel tuneable diode laser spectrometer. The line-broadening and line-shifting coefficients as well as their temperature-dependence parameters have been also evaluated theoretically, in the frame of a semi-classical approach based on an exponential representation of the scattering operator, an intermolecular potential composed of electrostatic quadrupole-quadrupole and pairwise atom-atom interactions as well as on exact trajectories driven by an effective isotropic potential.View full textDownload full textKeywordsacetylene, N2-pressure broadening, N2-pressure-induced shifts, spectral line shape, infrared spectroscopy, spectral line parameters, semi-classical calculationsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00268976.2012.720040