Line shape study of acetylene transitions in the ν1+ν2+ν4+ν5 band over a range of temperatures

Abstract:

In this study we have retrieved the line intensities, self broadened widths, pressure-induced shifts andselected line mixing coefficients for 20 R-branch transitions in the m1 + m2 + m4 + m5 band of acetylene.The spectra were recorded using our 3-channels diode laser spectrometer, a temperature controlled cellof fixed length and a second, room temperature cell. The Voigt and speed-dependent Voigt profiles withinclusion of line mixing effects were used to retrieve the line parameters. We determined the tempera-ture dependencies for line broadening, shift and line mixing coefficients.