Collisional-induced broadening and shift parameters of OH with Ar and N2 near 308.6 nm, measured at T = 1300–2000 K and P = 20–100 atm
| Autor: | Rishav Choudhary, Ronald K. Hanson, Julian J. Girard |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Radiation
Materials science Argon Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Nitrogen Atomic and Molecular Physics and Optics 010309 optics chemistry.chemical_compound Wavelength chemistry Kelvin–Voigt material High pressure 0103 physical sciences Hydroxyl radical 0210 nano-technology Spectroscopy Shock tube |
| Zdroj: | Journal of Quantitative Spectroscopy and Radiative Transfer. 221:194-201 |
| ISSN: | 0022-4073 |
| Popis: | The collision-induced broadening (2γOH A) and shift (δOH A) parameters of hydroxyl radical (OH) with two collisional partners—argon and nitrogen—and their associated temperature-dependence coefficients (nA and mA, respectively), have been measured in a series of shock tube experiments. The Q1(5) OH transition, a member of the A2Σ – X2Π (0, 0) rovibronic band with a line-center wavelength near 308.6 nm, represents an ideal target for quantitative spectroscopy in combustion applications, owing to its strength and degree of relative spectral isolation. Narrow-width tunable UV light was used to sample the Q1(5) lineshape profile across 8–10 wavelengths. The data were subsequently fit to the Voigt lineshape model at the fixed temperature, pressure and mixture composition. Measurements are presented for 2γOH Ar, δOH Ar, nAr, and mAr, recommended for T = 1300–2000 K, as well as 2γOH N2, δOH N2, nN2, and mN2, recommended for T = 1600–2000 K. The Q1(5) lineshape was also measured at pressures of 45 and 95 atm, for which application of the Voigt model yielded values of 2γOH Ar and δOH Ar that were consistent with lower-pressure measurements, supporting the validity of the lineshape model and, particularly, the diagnostic in question at such pressures. |
| Databáze: | OpenAIRE |
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