title: Measurements of collisional broadening coefficients by infrared polarization spectroscopy.
abstract: We present measurements of collisional broadening coefficients, obtained at atmospheric pressure, by polarization spectroscopy. Using tunable single mode laser radiation at approximately 2 microm, high-resolution infrared polarization spectra were recorded for CO2-Ar and CO2-He binary mixtures. The recorded polarization spectra were fitted with a Lorentzian cubed function form to obtain the broadening coefficients. The full-width at half-maxima (FWHM) collisional broadening rates of CO2 by Ar and He, for the R14 (12 degrees1<--00 degrees0) line, have been determined to be 0.161+/-0.018 cm-1 atm-1 and 0.1823+/-0.0032 cm-1 atm-1, respectively.
authors: School of Chemical Engineering, University of Adelaide, SA, 5005, Australia. zalwahab@chemeng.adelaide.edu.au
authors: Z T
authors: ZT
authors: Alwahabi
authors: J
authors: J
authors: Zetterberg
authors: Z S
authors: ZS
authors: Li
authors: M
authors: M
authors: Aldén
mesh_terms: D001128:Argon / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006371:Helium / Q000737:chemistry*; D008859:Microscopy, Polarization / Q000295:instrumentation* / Q000379:methods; D013055:Spectrophotometry, Infrared / Q000295:instrumentation* / Q000379:methods
chemical_list: D002245:Carbon Dioxide; D006371:Helium; D001128:Argon