Abstract Sulfur hexafluoride is a powerful greenhouse gas of industrial origin. Remote-sensing detection of this heavy species requires a detailed knowledge of its infrared absorption spectra that features many hot bands at room temperature. It is thus necessary to study many of its rovibrational levels which are implied in such hot band transitions. Based on our previous results reporting global fits of many rovibrational bands (Faye et al., 2017), we present here detailed analyses of three combination bands, namely ν 1 + ν 4 , ν 2 + ν 6 and ν 5 + ν 6 . The ν 2 + ν 6 combination band has been already investigated some years ago, but the present analysis represents a strong improvement; the two other bands are analyzed in detail for the first time. The results contribute to improve the simulation of hot bands in the strongly absorbing ν 3 and ν 4 regions and they have been used to update the SHeCaSDa database ( http://vamdc.icb.cnrs.fr/PHP/shecasda.php ).

中文翻译：

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基于全局拟合的六氟化硫 32SF6 组合带分析与建模。更新 SHeCaSDa 数据库

摘要 六氟化硫是一种强大的工业温室气体。这种重物质的遥感检测需要详细了解其红外吸收光谱，该光谱在室温下具有许多热带。因此，有必要研究在这种热带跃迁中隐含的许多振动能级。基于我们之前报告的许多振动波段的全局拟合结果（Faye 等，2017），我们在此详细分析了三个组合波段，即 ν 1 + ν 4 、ν 2 + ν 6 和 ν 5 + ν 6 。ν 2 + ν 6 组合带早在几年前就已经被研究过了，但目前的分析表明有了很大的改进；第一次详细分析了另外两个频段。