二极管激光光谱学：1.39微米区域内H₂O的谱线轮廓

Diode-Laser Spectroscopy: Line Profiles of H(2)O in the Region of 1.39 &mgr;m.

作者信息

Lepère Muriel, Henry Annie, Valentin Alain, Camy-Peyret Claude

机构信息

Laboratoire de Physique Moléculaire et Applications, CNRS, Université Pierre et Marie Curie, Tour 13, Case 76, 4 Place Jussieu, Paris Cedex 05, F-75252, France

出版信息

J Mol Spectrosc. 2001 Jul;208(1):25-31. doi: 10.1006/jmsp.2001.8372.

DOI:10.1006/jmsp.2001.8372

PMID:11437549

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. Copyright 2001 Academic Press.

摘要

我们使用一台稳定的二极管激光光谱仪，研究了7185.59厘米⁻¹附近水蒸气的谱线轮廓。在怀特型吸收池中采用低气压纯气体（≤1托），我们利用洛伦兹线型推导出了谱线强度。这项研究表明，当压力增加时，实验谱线与由洛伦兹线型描述的计算谱线之间存在明显差异。对于与氮气、氧气、氩气或氦气混合的水蒸气，我们在考虑碰撞变窄（迪克效应）的情况下，确定了碰撞展宽系数。利用软碰撞模型（加拉特里模型）或硬碰撞模型（劳蒂安和索别尔曼模型）确定了变窄参数，并与动摩擦系数进行了比较。版权所有2001年，学术出版社。