CO2 Pressure Shift and Broadening of Water Lines Near 790 nm
- Received Date: 2013-05-20
- Water, Carbon Dioxide, Pressure-induced half width, Pressure-induced line shift, Cavity ring-down spectroscopy
Abstract: Carbon dioxide pressure-broadened ro-vibrational transitions belonging to the ?2+3?3 band of H2 16O have been measured with a sensitive cavity ring-down spectrometer. Water vapor of relatively low pressures (<0.5 Torr) was used to limit the self-collisions among water molecules. After the calibration using the precise atomic transitions of Rb and a thermo-stabilized Fabry-Pérot interferometer, 10-5 cm-1 requency accuracy has been achieved. Line parameters are derived from least-squares fitting of the spectra using the “soft” collision model. The retrieved line parameters can be applied in the study of water absorption in the CO2-rich atmospheres of planets like Venus and Mars.
|Citation:||Yan Lu, Xin-fei Li, An-wen Liu, Shui-ming Hu. CO2 Pressure Shift and Broadening of Water Lines Near 790 nm[J]. Chinese Journal of Chemical Physics , 2014, 27(1): 1-4. doi: 10.1063/1674-0068/27/01/1-4|