Abstract：Accurate calculation of spectral line profiles of a gas is very important for gas sensing. As we know, a variation in pressure (temperature) of a gas will result in the corresponding variation in temperature (pressure) of the gas. In the present paper we calculated spectral line profiles of a gas by considering the changes in both temperature and pressure. The authors found that in our case the Lorentzian profile has broader applicable ranges of pressure and temperature, and the Gaussian profile is only applicable in some extreme conditions. Furthermore, the authors found that the influence of variations in pressure and temperature has to be considered in calculating the peak values of the spectral line profiles such as Gaussian, Lorentzian, and Voigt; otherwise the resultant relative errors of the calculated peak values can exceed 0.1. The similar observations were also found for other gases such as CH4, CO2, CO, and NO, although the parameters such as wavelength, coefficient of pressure-broadening, relative molecular mass, and temperature were different.
Key words：Gas detection;Spectral line profile;Voigt profile
陈 舟，陶少华*，杜翔军，侯小静 . 温度和压强的变化对谱线线型峰值的影响 [J]. 光谱学与光谱分析, 2013, 33(02): 312-315.
CHEN Zhou, TAO Shao-hua*, DU Xiang-jun, HOU Xiao-jing . Accurate Calculation of Spectral Line Profiles by Considering Influence of Varying Pressure and Temperature in a Gas . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(02): 312-315.
[1] Cui X J, Lengignon C, Tao W, et al. Journal of Quantitative Spectroscopy and Radiative Transfer, 2012, 113(11): 1300. [2] Forouhar S, Briggs R M, Frez C, et al. Applied Physics Letters, 2012, 100(3): 541. [3] Roger K, Ingemar L, Mats E, et al. Sensors and Actuators B: Chemical, 2011, 160(1): 571. [4] Reddy H P, Narasimhan S, Bhallamudi S M, et al. Computer & Chemical Engineering, 2011, 35(4): 651. [5] Gutmacher D, Foelmli C, Vollenweider W, et al. Procedia Engineering, 2011, 25: 1121. [6] XU Yuan-ze, GUO Jian-qiang, GAO Xiao-rong(徐远泽, 郭建强, 高晓蓉). Laser Technology(激光技术), 2010, 34(6): 778. [7] ZHANG Wang, WU Zhi-ying, YU Qing-xu(张 望, 武智瑛, 于清旭). Chinese Optics Letters(中国光学快报), 2007, 5(11): 677. [8] Rothman L S, Gordon I E , Barbe A, et al. Journal of Quantitative Spectroscopy and Radiative Transfer, 2009, 110(9): 535. [9] Abrarov S M, Quine B M, Jagpal R K. Computer Physics Communications, 2010, 181(5): 876. [10] Wells R J. Journal of Quantitative Spectroscopy and Radiative Transfer, 1999, 62(1): 29.
