High resolution polarization spectroscopy and laser induced fluorescence of CO2 around 2 mu m

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High resolution Infrared Polarisation Spectroscopy (IRPS) and Infrared Laser Induced Fluorescence (IRLIF) techniques were used to probe CO2/N-2 binary gas mixture at atmospheric pressure and ambient temperature. The probed CO2 molecules were prepared by laser excitation to an overtone and combination ro-vibrational state (12(0)1, J = 15) of CO2, centred at 4988.6612 cm(-1). IRPS and IRLIF line profiles were recorded for several CO2/N-2 binary mixtures. The observed IRLIF line shapes have the expected Lorentzian form while the observed IRPS line shapes are narrower by a factor of two than those recorded with the IRLIF and appear to have a Lorentzian-cubed profile. The recorded line profiles provide measurements of the pressure-broadening coefficient directly at atmospheric pressure. The Full-Width-Half-Maxima (FWHM) pressure broadening coefficients are measured, based on IRLIF, to be 0.2174 0.0092 cm(-1) atm(-1) and 0.1327 +/- 0.0077 cm(-1) atm(-1) for self- and N-2 collision broadening, respectively. The broadening coefficients obtained based on IRPS were measured to be similar to 8% larger than those obtained with IRLIF.

Zetterberg, JohanLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)forb-jze (författare)
Li, ZhongshanLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)forb-zli (författare)
Aldén, MarcusLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)forb-mal (författare)
FörbränningsfysikFysiska institutionen (creator_code:org_t)

Ingår i:European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics: Springer Science and Business Media LLC42:1, s. 41-471434-6060
Ingår i:The European Physical Journal D: Springer Science and Business Media LLC42:1, s. 41-471434-6079

Av författaren/redakt...: Alwahabi, Z. T.; Zetterberg, Joha ...; Li, Zhongshan; Aldén, Marcus

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