Abstract

Equation of transfer of infrared radiation propagating over a flat surface in a dense molecular gas with small temperature gradients is constructed. Interaction of the radiation field with a gas is manifested in radiative transitions between vibrational, rotational, or vibrational-rotational states of molecules. Therefore, the absorption spectrum of a molecular gas includes hundreds of transitions, and the absorption coefficient as a function of the photon frequency has an oscillatory structure with maxima in the centers of corresponding spectral lines and minima between the centers of neighboring lines. Analysis of the radiative transfer equation for specific problems requires knowledge a large number of parameters for the corresponding radiative transitions in molecules that are contained in the HITRAN data bank. Therefore this equation can be considered as addition to data of the HITRAN bank. The peculiarities of application of the infrared radiation transfer equation to certain cases are analyzed.

中文翻译：

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分子气体中红外辐射的传输方程

摘要

构造了在温度梯度较小的致密分子气体中在平面上传播的红外辐射的传输方程。辐射场与气体的相互作用表现为分子的振动，旋转或振动-旋转状态之间的辐射跃迁。因此，分子气体的吸收光谱包括数百个跃迁，并且吸收系数作为光子频率的函数具有振荡结构，该振荡结构在对应的谱线的中心具有最大值，而在相邻线的中心之间具有最小值。对特定问题的辐射传递方程进行分析需要了解有关HITRAN数据库中分子中相应辐射跃迁的大量参数。因此，该方程式可被视为对HITRAN bank数据的补充。分析了红外辐射传输方程在某些情况下应用的特殊性。