光谱学与光谱分析
NO2 分子在550～740 nm范围内的激光诱导荧光光谱
张连水1 ，孙 博1 ，张贵银1, 2 ，赵晓辉1
1. 河北大学物理科学与技术学院，河北 保定 071002
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
摘要 ： 以皮秒Nd:YAG激光器的二倍频输出(532 nm)作为激发源，在室温下，对NO2 分子在低气压和较高气压情况下进行了激光诱导荧光研究。在低气压条件下获得了在550～740 nm范围内的振动序列，将其归属为由第一电子激发态A2 B2 态向基电子态X2 A1 态不同振动态的跃迁，由此得到对称振动模式和弯曲振动模式的谐振频率，分别为ω1 =1 300.72 cm-1 和ω2 =744.14 cm-1 。并在此基础上对较高气压下荧光光谱产生的明显红移现象进行了解释，得到了有意义的结果。
关键词 ：NO2 分子;激光诱导荧光光谱;电子振动态;红移
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 A2 B2 to the vibrational levels of the ground electronic state X 2 A 1 , and then calculated the harmonic frequencies of symmetry stretch and bond stretch: ω 1 =1 300.72 cm-1 and ω 2 =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.
Key words ：NO2 molecules;LIDFS;Vibration levels;Red shift
收稿日期: 2003-08-26
修订日期: 2004-01-11
通讯作者:
张连水
引用本文:
张连水1 ，孙 博1 ，张贵银1, 2 ，赵晓辉1 . NO2 分子在550～740 nm范围内的激光诱导荧光光谱 [J]. 光谱学与光谱分析, 2005, 25(03): 416-419.
1 , SUN Bo1 , ZHANG Gui-yin1,2 ，ZHAO Xiao-hui1 . Laser Induced Dispersed Fluorescence Spectra of NO2 in the Range of 550-740 nm. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(03): 416-419.
链接本文:
https://www.gpxygpfx.com/CN/Y2005/V25/I03/416
[1] CUI Zhi-feng, CHEN Dong, FENG Er-yin et al(崔执凤，陈 东，凤尔银等). Acta Physica Sinica(物理学报), 2000, 49(11)：2151.
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