光谱学与光谱分析 |
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Design of a Controllable Low Temperature Cell and Application |
GAO Wei1, 2, CAO Zhen-song1, 2, YUAN Yi-qian1, 2, GAO Xiao-ming1, 2* |
1. Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031, China 2. Center for Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract A new cryogenic cell was developed and could operate at any stabilized temperature ranging from room temperature down to 100 K with temperature fluctuation less than ± 1 K. The structure and performance of the cryogenic cell was given in detail and the temperature stability of the sample cell was evaluated. The methane low temperature absorption spectra at 1.65 μm were recorded at 296, 248, 198 and 176 K and while the characteristic of methane low temperature absorption spectra at 6 039.70 cm-1 was given. According to the characteristic of our cryogenic cell, we measured the temperature-dependent exponent n of self-broadening coefficient at 6 039.657 9 cm-1.
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Received: 2011-07-19
Accepted: 2011-10-18
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Corresponding Authors:
GAO Xiao-ming
E-mail: xmgao@aiofm.ac.cn
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