The NNand NArcontinuum absorption spectra are calculated using the classical trajectory-based simulation (CTS). The spectra obtained are validated by new measurements in the subTHz spectral range along with the previously reported data in the far infrared. A novelty of our approach consists in the use of the CTS method to simulate both the fundamental nitrogen absorption band and the rototranslational band in NAr, i.e., we succeeded to step beyond the conventionally used approximation of the only rigid monomers. This extension of the theory made it possible, in particular, to demonstrate the validity of the rigid monomer assumption for the CTS simulation of the rototranslational NArband. The broadband spectra within 77–354 GHz were measured using the resonator spectrometer at temperatures of 278–333 K and pressures of 900–1600 Torr. A minor underestimation of the calculated absorption by 3.7% and 5% is shown for the NNand NArsystem, respectively. On the basis of the obtained data, a new analytical model is developed for the NNabsorption in the subTHz range, which can be used in radiation propagation codes for the Earth, Titan, or other nitrogen-rich atmospheres. The advantage of the model proposed here over those previously published is discussed.

中文翻译：

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纯 N[式略]气体及其与 Ar 的混合物中的连续吸收


NN 和 NAr 连续吸收光谱是使用经典的基于轨迹的模拟 (CTS) 计算的。所获得的光谱通过亚太赫兹光谱范围内的新测量以及之前报道的远红外数据进行了验证。我们方法的新颖之处在于使用CTS方法来模拟NAr中的基本氮吸收带和旋转平移带，即我们成功地超越了传统使用的唯一刚性单体的近似。该理论的这种扩展尤其可以证明旋转平移 NArband 的 CTS 模拟的刚性单体假设的有效性。使用谐振器光谱仪在 278-333 K 的温度和 900-1600 Torr 的压力下测量 77-354 GHz 内的宽带光谱。 NN 和 NAr 系统的计算吸收率分别小幅低估了 3.7% 和 5%。在获得的数据的基础上，开发了一种新的亚太赫兹范围内的近邻吸收分析模型，该模型可用于地球、土卫六或其他富氮大气的辐射传播代码。讨论了这里提出的模型相对于之前发布的模型的优点。