کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5430087 | 1508708 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Argon-broadening coefficients in the ν7 band of ethylene at low temperatures Argon-broadening coefficients in the ν7 band of ethylene at low temperatures](/preview/png/5430087.png)
Using a tunable diode-laser spectrometer adapted with a low temperature cell, the ethylene line-broadening by argon is measured for some vibrotational lines in the ν7 band at different temperatures varying from 198.2 to 273.2K. The collisional half-widths obtained by modeling each spectral line with the simple profile of Voigt are always smaller than those derived from the Rautian model which takes into account the Dicke effect. From these collisional half-widths, for each line, the broadening coefficients are obtained for different temperatures. Calculations of the corresponding broadening coefficients are made independently on the basis of the Robert-Bonamy formalism with exact trajectories using an atom-atom intermolecular potential model. The temperature dependence parameters n are determined experimentally and theoretically by comparing the experimental and theoretical broadening coefficients of the same lines at room and different low temperatures.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 110, Issues 6â7, AprilâMay 2009, Pages 367-375