Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5428377 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2014 | 12 Pages |
â¢Various spectroscopic parameters of acetylene are measured for ν4+ν5 band.â¢Linestrengths, N2-, Ar-, He- and self-broadening coefficients are reported.â¢Voigt, Galatry and Rautian line profiles are used to simulate the spectra.â¢Heated cell measurements (296-683 K) were carried out for five rotational transitions.â¢Collisional narrowing coefficients and dynamic friction coefficients are reported.
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 cmâ1. 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.