Optical constants of carbon dioxide ice.
Optical constants of carbon dioxide ice.
复制标题
二氧化碳冰的光学常数。
DOI：
10.1364/ao.25.002650
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发表时间：
1986
期刊：
影响因子：
1.9
通讯作者：
S. Warren
中科院分区：
文献类型：
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作者：
S. Warren
回顾了从紫外线到微波的电磁光谱的所有部分的固体二氧化碳吸收系数和折射率的实验室测量，重点是77K以上温度的值。在某些情况下，现有的测量结果需要重新解释。汇编了52-160 nm波长的光谱吸收系数Kabs(由于缺乏数据而有一些空白)，然后用Kramers-Kronig分析计算了复折射率。讨论了虚折射率的不确定度，它随波长变化很大。除近强吸收带外，其余光谱的折射率实部均接近1.4，而在强吸收带外，折射率的实部精度为±0.05。除了强的窄吸收线外，对于180330 nm、1.02.5μm和25μm-25 mm波长，没有可测量的吸收。由于现有测量中的实验误差，还需要重新测量2.5至25μm之间的部分红外光谱的Kabs。
Laboratory measurements of the absorption coefficient and refractive index of solid CO2 are reviewed for all parts of the electromagnetic spectrum from the ultraviolet to the microwave with emphasis on values for temperatures above 77 K. The available measurements in some cases require reinterpretation. A compilation of the spectral absorption coefficient kabs is made for 52-nm to 160-nm wavelength (with some gaps because of lack of data), and the complex refractive index is then computed by Kramers-Kronig analysis. The uncertainty in imaginary refractive index is discussed; it varies greatly with wavelength. The real part of the refractive index is close to 1.4 for all parts of the spectrum except near strong absorption bands and is accurate to ±0.05 outside those bands. No measurements of absorption are available for 180–330-nm, 1.0–2.5-μm, and 25-μm–25-mm wavelength, except in the strong narrow absorption lines. Remeasurement of kabs is also needed for parts of the IR spectrum between 2.5 and 25 μm because of experimental error in the available measurements.