Temperature dependence of the N₂-broadening coefficients of acetylene

In this paper, we present the N-broadening coefficients of seven rovibrational lines in the ν + ν band of C H, located around 1330 cm, measured at five temperatures (173.2, 198.2, 223.2, 248.2, 273.2 K). The measurement of these coefficients was realized, with a tunable diode-laser spectrometer coupled with a low temperature absorption cell, in order to determine their temperature dependence. The line parameters were obtained by fitting to the experimental profile the Voigt lineshape and the Rautian and Galatry models taking into account the collisional narrowing. The results have been compared with previous experimental datas and also calculations. Our coefficients of collisional broadening, γ, obtained at different temperatures as well as the temperature dependence parameter, n, are in satisfactory agreement with previous studies.