Buffer-gas pressure broadening at high J values in the v3 band of CO2 measured with tunable diode laser absorption spectroscopy

被引：7
|
作者：
Chen, Dongdong [1 ]
Shi, Lei [1 ]
Xu, Ping [1 ]
Wang, Rui [1 ]
Zhang, Changhua [1 ]
机构：
[1] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Peoples R China
来源：
JOURNAL OF MOLECULAR SPECTROSCOPY | 2021年 / 377卷
基金：
中国国家自然科学基金;
关键词：
CO2; Pressure broadening; Buffer gas; Laser absorption spectroscopy; Infrared spectra; SPECTRAL-LINE SHAPES; TEMPERATURE-DEPENDENCE; SHIFT COEFFICIENTS; PARAMETERS; 4.3-MU-M; TRANSITIONS; NITROGEN; VOIGT;
D O I：
10.1016/j.jms.2021.111429
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Pressure broadening coefficients of CO2 perturbed by buffer gases (N-2, O-2, He, and Ar) were studied for four absorption lines R(62), R(64), R(66) and R(68) belonging to the nu(3) band in the 4.2 lm region with tunable diode laser absorption spectroscopy at room temperature for the first time. The broadening coefficients were retrieved by fitting the absorption spectrum with the quadratic speed-dependent Voigt (qSDV) profile. It was shown that the measured broadening coefficients have a behavior of gamma(Ar) < gamma (O-2) < gamma(He) < gamma(N-2). The broadening coefficients by air and Ar were in good agreement with available values in the HITRAN 2016 database and previous measurements in the literature for the same band. (C) 2021 Elsevier Inc. All rights reserved.
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页数：6
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