Measurement and analysis of rotational lines in the (2v1 + v2 + v3) overtone band of H2O perturbed by CO2 using near infrared diode laser spectroscopy

被引:5
作者
Poddar, Priyanka [2 ]
Bandyopadhyay, Amitava [2 ]
Biswas, Debasish [1 ]
Ray, Biswajit [2 ]
Ghosh, Pradip N. [1 ]
机构
[1] Jadavpur Univ, Kolkata 700032, W Bengal, India
[2] Univ Calcutta, Dept Phys, Kolkata 700009, W Bengal, India
关键词
DIODE-LASER SPECTROSCOPY; WATER-VAPOR; BROADENING PARAMETERS; WAVELENGTH REGION; H2O-CO2; MIXTURES; MU-M; H2O; TEMPERATURE; BAND; NM;
D O I
10.1016/j.cplett.2008.12.074
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report the CO2-induced broadening coefficients and line strength parameters of water vapor rovibrational transitions belonging to the (2v(1) + v(2) + v(3)) overtone band measured by using an NIR diode laser spectrometer. Rotational quantum number dependence of the broadening coefficients is also shown. Use of balanced photodetector and wavelength modulation spectroscopy with small current modulation amplitude helped to obtain improved S/N ratio of the spectra. The recorded line shapes are fitted with standard Voigt profile by using a non-linear least squares fitting program to extract the line shape parameters. (C) 2008 Elsevier B.V. All rights reserved.
引用
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页码:52 / 56
页数:5
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