Journal of Quantitative Spectroscopy and Radiative Transfer ( IF 2.3 ) Pub Date : 2020-07-19 , DOI: 10.1016/j.jqsrt.2020.107224 David M. Wilmouth , David S. Sayres
Rayleigh scattering cross sections for argon, carbon dioxide, sulfur hexafluoride, and methane were measured using Broadband Cavity Enhanced Spectroscopy (BBCES) between 264 and 297 nm, extending the region of experimental cross section data available for all four gases. The experimentally derived values for Ar and CO2 are in excellent agreement with refractive index based (n-based) calculations, within 0.8% and 1.0% on average, respectively. Our measured Rayleigh scattering cross sections for SF6 and CH4, however, suggest that n-based calculations for these gases should be revised. We derive new dispersion relations for SF6 and CH4, incorporating data from this study and from our previous work at 333–363 nm, to provide improved indices of refraction and n-based Rayleigh scattering cross sections.
中文翻译:
使用BBCES在紫外线中测定Ar,CO 2,SF 6和CH 4的瑞利散射截面和折射率
使用宽带腔增强光谱(BBCES)在264至297 nm之间测量了氩气,二氧化碳,六氟化硫和甲烷的瑞利散射截面,从而扩展了所有四种气体的实验截面数据范围。Ar和CO 2的实验得出的值与基于折射率(基于n的)的计算非常吻合,分别平均在0.8%和1.0%之内。然而,我们对SF 6和CH 4测得的瑞利散射横截面表明,应修改这些气体的基于n的计算。我们得出SF 6和CH 4的新色散关系,结合了这项研究和我们先前在333–363 nm范围内的工作数据,以提供改进的折射率和基于n的瑞利散射截面。