Journal
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
Volume 165, Issue -, Pages 76-87Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2015.06.021
Keywords
HCl; Self-induced broadening; Self-induced shift; Line intensity; First overtone band (2-0)
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Funding
- Deutsche Forschungsgemeinschaft, DFG
- EUMETRISPEC project
- European Metrology Research Program, EMRP
- EURAMET
- European Union
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FTIR spectra of the 2-0 band of HCl have been measured in the 5300-5900 cm(-1) spectral region at 15 different pressures (0.05-2.5 bar) and at a spectral resolution of 0.07 cm(-1). For the first time, reliable and consistent self-induced broadening and shift coefficients for the complete HCl 2-0 band have been reported. Line intensities determined from a robust regression analysis with improved uncertainties are also presented. Compared to previous laser-based measurement for the R3 line {Ortwein et al., Appl Phys B: Lasers Opt 2010;100:341-7}, our newly measured gamma(self) coefficient and line intensity are 1.35% and 0.10% larger, respectively. Hartmann and Boulet {Hartmann & Boulet, JCP 113, 9000 (2000)} developed a formalism describing the relation between the shift coefficients of different vibrational bands and successfully applied to Ar-HF system. Our newly measured self-induced shift coefficients suggest that the H-B formalism is not suitable for describing the HCl-HCl collisional system. (C) 2015 Elsevier Ltd. All rights reserved.
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