| 光谱学与光谱分析 |
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| Laser Induced Dispersed Fluorescence Spectra of NO2 in the Range of 550-740 nm |
| ZHANG Lian-shui1, SUN Bo1, ZHANG Gui-yin1,2，ZHAO Xiao-hui1 |
1. College of Physics Science and Technology, Hebei University, Baoding 071002, China
2. North China Electric Power University, Baoding 071003, China |
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Abstract Laser induced dispersed fluorescence spectra (LIDFS) of NO2 molecules, excited by second harmonic lines (the output wavelength is 532 nm) of a pulsed Nd: YAG laser at room temperature and at low and high NO2 pressures, were obtained and analyzed. The authors got vibronic progressions in the range of 550-740 nm at low pressure and ascribed them to the transitions from the first excitation electronic state A2B2 to the vibrational levels of the ground electronic state X2A1, and then calculated the harmonic frequencies of symmetry stretch and bond stretch: ω1=1 300.72 cm-1 and ω2=744.14 cm-1, respectively. On the basis of what was above-mentioned, the authors compared the spectra at low pressure with those at high pressure and pointed out the difference between them. Then the authors also interpreted the obvious red shift of fluorescence spectra at high NO2 pressures in terms of a step-ladder model of vibrational deactivation and obtained significative results.
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Received: 2003-08-26
Accepted: 2004-01-11
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Corresponding Authors:
ZHANG Lian-shui
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| Cite this article: |
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ZHANG Lian-shui,SUN Bo,ZHANG Gui-yin, et al. Laser Induced Dispersed Fluorescence Spectra of NO2 in the Range of 550-740 nm[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(03): 416-419.
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https://www.gpxygpfx.com/EN/Y2005/V25/I03/416 |
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