Line broadening and shift coefficients of acetylene at 1550nm

Measurements of linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene in the ν4+ν5 combination band using a cw quantum cascade laser

“…In all cases, our results agree well with Dhyne et al [17] with a maximum difference of about 2%. We have also compared our results with Arteaga et al [38] who reported N 2 -broadening coefficients for ν 1 +ν 3 band over the same rotational quantum numbers as our measurements in ν 4 +ν 5 band. Arteaga et al [38] measurements are also found to be in good agreement with our results.…”

“…We have also compared our results with Arteaga et al [38] who reported N 2 -broadening coefficients for ν 1 +ν 3 band over the same rotational quantum numbers as our measurements in ν 4 +ν 5 band. Arteaga et al [38] measurements are also found to be in good agreement with our results. In Table 3, we report measurements of Ar-broadening coefficients (2γ C2H2-Ar ) in the ν 4 +ν 5 band at room temperature (296 K) deduced from Voigt, Galatry and Rautian profiles.…”

“…Values obtained using Galatry and Rautian profiles are larger than the corresponding ones resulting from the Voigt profile by about 4%. Our measurements are compared in Table 4 with Arteaga et al [38] data for ν 1 +ν 3 band and the calculations performed by Thibault [39] for the R-branches of acetylene. Excellent agreement is seen among our measurements, Arteaga et al [38] data and Thibault [39] calculations with a maximum difference of about 1.5%.…”

“…To our knowledge, this study reports the first measurements of Ar-broadening coefficients for ν 4 +ν 5 band of acetylene. Previous Ar-broadening studies performed in other spectral regions of acetylene include Bouanich et al [35] for ν 5 band and Arteaga et al [38] for ν 1 +ν 3 band.…”

Linewidths of C2H2 perturbed by H2: experiments and calculations from an ab initio potential

“…Much less attention has been paid to the molecular-broadening of acetylene lines. Experimentally, N 2 -, O 2 -, H 2 -pressure broadening [6,[15][16][17][18][19][20][21][22] and self broadening pressure coefficients [6,15,23] have been measured at various temperatures between 147 and 300 K.…”