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CO2 Pressure Shift and Broadening of Water Lines Near 790 nm
Yan Lu,Xin-fei Li,An-wen Liu*,Shui-ming Hu
Author NameAffiliationE-mail
Yan Lu Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei 230026, China  
Xin-fei Li Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei 230026, China  
An-wen Liu* Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei 230026, China awliu@ustc.edu.cn 
Shui-ming Hu Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei 230026, China  
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.
Key words:  Water, Carbon Dioxide, Pressure-induced half width, Pressure-induced line shift, Cavity ring-down spectroscopy
FundProject:
CO2对790 nm附近水线的压力加宽和位移
陆燕,李新飞,刘安雯*,胡水明
摘要:
采用高灵敏的激光光腔衰荡光谱技术研究了CO216O水分子v2+3v3振动带跃迁线的压力诱导效应. 为了抑制水的自碰撞效应,水的压力在实验中低于0.5 Torr. 基于铷原子吸收线和超稳法布里-珀罗标准确定了跃迁谱线高达10-5 cm-1精度的绝对频率. 采用软碰撞模型对吸收线进行模拟,获得了对应的线形参数.
关键词:  水,二氧化碳,压力诱导加宽,压力诱导位移,光腔衰荡光谱
DOI:10.1063/1674-0068/27/01/1-4
分类号: