Characteristics of CH4 Spectroscopy at low temperature near 1.65 ?m

Abstract

Abstract:

The absorption spectral parameters are important when the parameters are used to sense and model the atmospheres of the Earth and the outer planets, especially in low temperature. Sometimes CH₄ parameters listed in the HITRAN database are uncertain to some extent. In order to measure the low temperature absorption spectroscopy of methane, a newly developed cryogenic cell by ourselves was used in combination with a distributed feedback (DFB) diode laser as the light source and low temperature absorption spectroscopy of methane at 1.65 ?m were measured. The low temperature absorption spectroscopy of methane at 6039.70 cm^-1 is given for example and the method to measure the temperature-dependent exponent of self-broadening coefficient of methane is discussed.

Key words: tunable diode laser absorption spectroscopy, Low temperature spectrum, temperature-dependent exponent

CLC Number:

O433.1

GAO Wei，CHEN Wei-dong，ZHANG WEI-jun，GAO Xiao-ming. Characteristics of CH4 Spectroscopy at low temperature near 1.65 ?m[J]. Journal of Atmospheric and Environmental Optics, 2012, 7(1): 13-17.

References

[1] Müller G. A Contribution to the Implementation of the WMO Strategic Plan: 2008-2011 (WMO TD NO. 1384). GAW report, No. 172. World Meteorological Organization, Geneva, Switzerland, 2008.
[2] Rothman L S, Gordon I E., et al. The HITRAN 2008 molecular spectroscopic database. J. Quant. Spectrosc. Radiat. Transfer, 2009, 110: 533.
[3] ZHANG Xiao-hui, CHEN Jin-hai, PENG Qi, et al. 激光频率调制线性分析。(张向辉，陈金海，彭其，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001, 21(3) : 257.
[4] GU Hui-ming(谷怀民)，Alan Zhang. 多光程吸收的频率调制光谱. Acta Photonica Sinca (光子学报), 2003, 32:1013.
[5] WU Sheng-hai, ZHUANG Hua, YANG Xiao-hua, et al (吴升海，庄华，杨晓华). 高分辨分子吸收光谱中的波长校准方法. Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2002, 22(4) : 569.
[6] Boras K, Deboer D, Lin Z, Reilly J P. The Stark effect in methane's 3v1 + v3 vibrational overtone band. J. Chem. Phys, 1993, 99: 1429.
[7] Campargue A, Chenevier M, Stoeckel F. Intracavity-laser-absorption spectroscopy of the visible overtone transition of methane in a supersonically cooled jet. Chem. Phys. Lett, 1991, 183: 153.
[8] Campargue A, Permogorov D, Jost R. Intracavity absorption spectroscopy of the third stretching overtone transition of jet cooled methane. J. Chem. Phys, 1995, 102: 5910. [9] Hippler M, Quack M. Cw-cavity ring-down infrared absorption spectroscopy in pulsed supersonic jets: Nitrous oxide and methane. Chem. Phys. Lett, 1999, 314: 273.
[10] Hippler M, Quack M. High-resolution Fourier transform infrared and cw-diode laser cavity ringdown spectroscopy of the ν2+2ν3 band of methane near 7510 cm−1 in slit jet expansions and at room temperature. J. Chem. Phys, 2002,116: 6045.
[11] Amrein A, Quack M, Schmitt U. High-resolution interferometric Fourier transform infrared absorption spectroscopy in supersonic free jet expansions: carbon monoxide, nitric oxide, methane, ethyne, propyne, and trifluoromethane. J. Phys. Chem. 1988, 92: 5455.
[12] Albert S, Bauerecker S, Boudon V, Brown L R, Champion J P, Loëte M, Nikitin A, Quack M, Global analysis of the high resolution infrared spectrum of methane 12CH4 in the region from 0 to 4800 cm−1. Chemical Physics. 2009, 356: 131.
[13] Kluczynski P, Gustafsson J, et al. Wavelength modulation absorption spectrometry — an extensive scrutiny of the generation of signals. Spectrochimica Acta Part B, 2001,56: 1277.
[14] Rothman L S, Jacquemart D, et al. The HITRAN 2004 molecular spectroscopic database. J. Quant. Spectrosc. Radiat. Transfer, 2005, 96: 139.
[15] Bragg S L, Kelley J D. Atmospheric water vapor absorption at 1.3 µm. Appl. Opt, 1987, 26: 506.