Abstract

A heated and pressurized quartz cell with 150.5-mm pathlength was used to experimentally determine UV absorption spectra and further absorption cross sections of SO2, C2 H2, and O2 in the wavelength range between 200 and 400 nm. Spectra were recorded at room temperature, and at 600 and 800 C and at absolute pressures between 1 and 6 bar. A 30-W deuterium lamp was used as a light source, and the light was detected with a photomultiplier tube through a 0.4-m Czerny-Turner monochromator. Slit widths of the monochromator were adjusted to achieve a 5 A measurement bandwidth, and the scan through the wavelength range was made in 5 A steps. For each individual temperature and pressure level, a reference spectrum was first recorded with the cell filled with nitrogen. After this, the cell was filled with the selected species mixed with nitrogen, and the absorption spectra were recorded in similar conditions. The studied gas mixtures were calibrated to 3% accuracy.

Temperature and pressure dependence of NH₃ and C₂H₄ absorption cross sections at CO₂ laser wavelengths

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Temperature- and pressure-dependent midinfrared absorption cross sections of gaseous hydrocarbons

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Apparatus for the Determination of the Band Absorption of Gases at Elevated Pressures and Temperatures

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J. Opt. Soc. Am. 50(2) 130-136 (1960)

Absorption line shift with temperature and pressure: impact on laser-diode-based H₂O sensing at 1.393 µm

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CO₂ Laser Absorption Coefficients for Determining Ambient Levels of O₃, NH₃, and C₂H₄

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