| 光谱学与光谱分析 |
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| Theoretical Research on the Effective Backscattering Cross-Section of Voigt Profile HeⅠ 1 083.0 nm |
| HE Jian,ZHANG Qing-guo,YAN Shu-qing |
| School of Science,Henan University of Science and Technology,Luoyang 471003,China |
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Abstract In the present paper,considering the Lorentz profile caused by collisions,the backscattering cross-section and the effective backscattering cross-section of Voigt profile (the convolution of Gauss profile and Lorentz profile) of He Ⅰ 1 083.0 nm were studied. The HeⅠ 1 083.0 nm is actually a triplet formed by three very close lines,the 1 083.034 nm,the 1 083.025 nm and the 1 082.908 nm,and the curve and peak value of the backscattering cross-section and the effective backscattering cross-section were given. The order is consistent with the predicted order. This result is closer to the actual case than the Gaussian profile,and gives overall and detailed theoretical basic to resonant Lidar to detect the metastable He in thermosphere. The curves and peak values of the backscattering cross-section and the effective backscattering cross-section of HeⅠ 388.9 nm and HeⅠ 318.8 nm were also given,which are smaller than that of the 1 083.0 nm. This is consistent with the experiment results.
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Received: 2006-03-20
Accepted: 2006-08-08
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Corresponding Authors:
HE Jian
E-mail: hejian405@163.com
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| Cite this article: |
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HE Jian,ZHANG Qing-guo,YAN Shu-qing. Theoretical Research on the Effective Backscattering Cross-Section of Voigt Profile HeⅠ 1 083.0 nm [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(08): 1607-1610.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2007/V27/I08/1607 |
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