| NO分子共振增强的多光子离化机制 |
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| 引用本文： | 张贵银,张连水,杨晓冬,孙博.NO分子共振增强的多光子离化机制[J].光谱学与光谱分析,2004,24(11):1293-1295. |
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| 作者姓名： | 张贵银 张连水 杨晓冬 孙博 |
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| 作者单位： | 河北大学物理科学与技术学院,河北,保定,071002;华北电力大学应用物理系,河北,保定,071003;河北大学物理科学与技术学院,河北,保定,071002 |
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| 基金项目： | 河北省自然科学基金(102090)资助项目 |
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| 摘 要： | 用皮秒Nd：YAG激光器泵浦光学参量发生／放大器做激发源，获得了420～480nm波长范围内NO分子的多光子离化谱。通过对谱线的归属，分析确定了NO分子的离化为以A^2∑为中间共振态的(2 2)共振增强的多光子离化过程。以速率方程为基础，利用激光脉宽较窄(35ps)的条件，推导出离化信号随激光强度呈近四次方变化关系，与实验测量结果相符，这可为用共振增强多光子离化(REMPI)光谱技术探测污染物NO分子提供实验参考。
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| 关 键 词： | NO分子 多光子离化 离化通道 |
| 文章编号： | 1000-0593(2004)11-1293-03 |
| 修稿时间： | 2003年5月16日 |
Mechanism of Resonance-Enhanced Multiphoton Ionization of NO Molecule |
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| ZHANG Gui yin ,ZHANG Lian shui ,YANG Xiao dong ,SUN Bo . College of Physics Science and Technology,Hebei University,Baoding ,China . Applied Physics.Mechanism of Resonance-Enhanced Multiphoton Ionization of NO Molecule[J].Spectroscopy and Spectral Analysis,2004,24(11):1293-1295. |
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| Authors: | ZHANG Gui yin ZHANG Lian shui YANG Xiao dong SUN Bo College of Physics Science and Technology Hebei University Baoding China Applied Physics |
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| Institution: | College of Physics Science and Technology, Hebei University, Baoding 071002, China. |
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| Abstract: | NO molecule is a diatomic molecule with different nucleus. It is a serious pollutant and is harmful to the health of the generation. It comes mainly from inflammation process using coal as burning material. So researchers have always been interested in it. The Resonance-Enhanced Multi-Photon Ionization (REMPI) spectrum of NO has been obtained in the range of 420-480 nm with a Nd:YAG laser pumped optical parametric generator and amplifier as the radiation source. The ionization pathway of NO molecule was acquired with the assignment of the spectral lines. NO molecules are ionized via the resonant intermediate state A2 sigma+ and by a (2 + 2) REMPI process. On the basis of theoretical rate equation and with the condition that the duration of the laser pulse is very short (approximately 35ps), the dependence of ion signals on laser intensity was deduced. The variation of the ionization signal versus laser intensity is near quartic. This is in good agreement with the experimental result. |
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| Keywords: | Nitrogen oxide REMPI Ionization pathway |
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