| 光谱学与光谱分析 |
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| The Resonance-Enhanced Ionization Spectrum of NO via (3+1) Multiphoton Process |
| ZHANG Gui-yin,JIN Yi-dong |
| College of Mathematics and Physics,North China Electric Power University,Baoding 071003，China |
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Abstract The resonance-enhanced multi-photon ionization (REMPI) spectrum of NO in the region of 420-500 nm was obtained with the optical parameter generator and amplifier pumped by a Nd∶YAG laser as the radiation source. The spectrum presents the characteristic of banded structure. This indicates that NO molecule is ionized in a resonant manner and via a multi-photon process in this wavelength region. The fact that the variation of the ion signal intensity versus the laser intensity is near quartic suggests that the NO molecule is ionized by a four-photon process. Based on the theoretical calculation,a spectral progression that comes from the (3+1) multiphoton process and via E 2Σ intermediate resonant state is ascribed. The ionization pathway of NO molecule can be expressed as NO(X 2Π)3hν→NO(E 2Σ)hν →NO++e. The vibration constants of NO E 2Σ state were obtained from analyzing the result. So the study of the energy level structure of NO E 2Σ state by the technique of REMPI was realized for the first time.
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Received: 2006-04-12
Accepted: 2006-08-03
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Corresponding Authors:
ZHANG Gui-yin
E-mail: gyzhang65@yahoo.com.cn
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| Cite this article: |
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ZHANG Gui-yin,JIN Yi-dong. The Resonance-Enhanced Ionization Spectrum of NO via (3+1) Multiphoton Process[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(08): 1469-1472.
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https://www.gpxygpfx.com/EN/Y2007/V27/I08/1469 |
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