| 光谱学与光谱分析 |
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| Laser Fluorescence Excited Spectrum of NO via A2Σ←X2Π Transition |
| ZHANG Lian-shui，ZHANG Gui-yin，ZHAO Xiao-hui，YANG Xiao-dong，LI Yi |
| College of Physics Science and Technology, Hebei University, Baoding 071002, China |
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Abstract Two-photon fluorescence excited spectrum of NO induced by Nd:YAG laser pumped optical parameter generator/amplifier as excitation source was obtained in the range of 420-472 nm. With this technique, the structure of the energy levels of NO molecule in A2Σ electronic state was investigated. The peaks of the spectrum were attributed to A2Σ(v′=0,1)←X2Π(v″=0) transition. The near square dependence of fluorescence signal on the laser intensity indicates a two-photon process. The ground-vibrational-state oscillation frequency and the force constant of A2Σ state were calculated. The fluorescence lifetime of A2Σ(v′=0) state under the pressure of 266 Pa was also obtained by measuring fluorescence decay curve of A2Σ(v′=0) states. It is about 53.76 ns. Fitting the curve of the fluorescence radiant lifetime versus pressure, the spontaneous radiant lifetimes and the rate coefficient of nonradiative transition relaxation of A2Σ(v′=0, 1) states were deduced.
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Received: 2002-09-05
Accepted: 2003-01-10
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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,ZHAO Xiao-hui, et al. Laser Fluorescence Excited Spectrum of NO via A2Σ←X2Π Transition [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(06): 641-643.
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| URL: |
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http://www.gpxygpfx.com/EN/Y2004/V24/I06/641 |
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