| 光谱学与光谱分析 |
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| Optical Properties Research of NH4NO3 by Fourier Transform Infrared Spectroscopy |
| LIU Na, WEI Xiu-li*, GAO Min-guang, XU Liang, TONG Jing-jing, LI Xiang-xian, JIN Ling |
| Key Laboratory of Environment Optics and Technology，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences， Hefei 230031，China |
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Abstract In the present paper, the infrared spectrum of aerosol and NH4NO3 was analysed and compared, and the result showed that the infrared spectral features of aerosol are consistent with that of NH4NO3. The absorption coefficient α and the mass absorption cross section κ of NO-3 was calculated by the transmissivity of NO-3 in NH4NO3 according to Beer-Lambert law. Then the imaginary part of the complex refractive index was calculated through α. The real part of the complex refractive index was derived from the K-K(Kramers-Kroning)relationship. It has important significance for further research on the scattering and absorption characteristics of the different composition of the atmospheric aerosol through analysing the results of the experiment.
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Received: 2012-11-27
Accepted: 2013-02-25
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Corresponding Authors:
WEI Xiu-li
E-mail: xlwei@aiofm.ac.cn
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