Collisional line-shape parameters and their temperature dependence for the nu(1) + nu(3) band of C2H2 perturbed by CO2

CO2-broadened line widths and CO2-pressure induced line shifts have been measured for 42 R- and P-branch transitions in the nu(1) + nu(3) band of acetylene at seven temperatures in the range 216-333 K to obtain the temperature dependences of broadening and shift coefficients. The spectra were recorded by a 3-channel tunable diode laser spectrometer, and the traditional Voigt-profile model was employed to retrieve the line parameters with a multispectrum fitting procedure. 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-empirical approach based on analytical Anderson-type expressions and including a few-parameter correction to account for the real curved trajectories. Being validated by comparison with measurements, this approach has been used to compute extensive (0 <= J <= 70) R- and P-line lists which could be useful for atmospheric/astrophysical applications and spectroscopic databases. (C) 2017 Elsevier Ltd. All rights reserved.