Abstract Using a stabilized diode-laser spectrometer, we have studied the line profiles of water vapor near 7185.59 cm −1 . With low pressures of pure gas (≤1,Torr) in a White-type cell, we have deduced the line intensities using the Voigt profile. This study shows clear differences between experimental and calculated lines described by a Voigt profile when the pressure increases. For water vapor in mixtures with N 2 , O 2 , Ar, or He, we have determined the collisional broadening coefficients, taking into account the collisional narrowing (Dicke effect). The narrowing parameters have been determined using soft (Galatry) or hard (Rautian and Sobel'man) collision models and compared to the dynamic friction coefficient.

中文翻译：

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二极管激光光谱：1.39 μm 区域内 H2O 的线轮廓

摘要 使用稳定的二极管激光光谱仪，我们研究了 7185.59 cm -1 附近水蒸气的谱线。在怀特型电池中使用低压纯气体 (≤1,Torr) 时，我们使用 Voigt 曲线推导出了线强度。这项研究表明，当压力增加时，Voigt 曲线描述的实验线和计算线之间存在明显差异。对于与 N 2 、O 2 、Ar 或 He 混合的水蒸气，我们已经确定了碰撞展宽系数，同时考虑了碰撞变窄（迪克效应）。已使用软（Galatry）或硬（Rautian 和 Sobel'man）碰撞模型确定变窄参数，并与动摩擦系数进行比较。