M.B. Sajid, E. Essebbar, A. Farooq
Journal of Quantitative Spectroscopy and Radiative Transfer, 148, pp. 1-12, (2014)
Acetylene, Linestrength, Collisional broadening, Infrared spectroscopy, Quantum cascade lasers
Linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene have been measured at 296 K in the P branch of the ν4+ν5
combination band for 25 rotational transitions. The effect of gas
temperature is studied over 296–683 K for five transitions to allow the
determination of the temperature dependent exponent n for N2-
and Ar-broadening coefficients. These measurements were performed using
a continuous-wave quantum cascade laser (cw-QCL) operating over
1253–1310 cm−1. Spectroscopic parameters were obtained by
fitting absorption spectra using Voigt, Galatry and Rautian profiles.
Linestrength and broadening results are compared with previous studies
available in literature for the ν4+ν5 combination band and other vibrational bands of acetylene.