| 光谱学与光谱分析 |
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| Self-Absorption of NO Fluorescence Induced by Two-Photon |
| ZHANG Lian-shui,ZHANG Gui-yin,HAN Xiao-feng |
| College of Physics Science and Technology, Hebei University, Baoding 071002, China |
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Abstract The two-photon LIDFS of NO excited with 452.4 nm output of an optical parameter generator and optical parameter amplifier pumped by a Nd：YAG laser was obtained. The vibration frequency and the inharmonic coefficients of the ground electronic state of NO were calculated from the results of the spectral ascription. They are ω″e=(1 904.7±7.3) cm-1,ω″eχ″e=(14.2±1.2) cm-1, and ω″ey″e=-(0.021 8±0.009 1) cm-1 respectively. It was found for the first time that the intensity of the spectral lines departs from the Frank-Condon principle due to the self-absorption of NO molecules. The spectral line of A 2Σ(v′＝0)→X 2Π(v″＝0) transition disappears in the fluorescence spectra. But it appears gradually with decreasing the sample pressure and the distance from the laser-gas interaction volume to the receiving window. All of these provide an important reference for monitoring NO by the technique of laser-induced fluorescence.
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Received: 2005-01-19
Accepted: 2005-04-21
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Corresponding Authors:
ZHANG Lian-shui
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| Cite this article: |
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ZHANG Lian-shui,ZHANG Gui-yin,HAN Xiao-feng. Self-Absorption of NO Fluorescence Induced by Two-Photon [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(05): 925-927.
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http://www.gpxygpfx.com/EN/Y2006/V26/I05/925 |
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