激光诱导NO_2分子500—532nm区荧光激发谱的实验研究  

LASER-INDUCED FLUORESCENCE EXCITATION SPECTRUM OF NO_2 IN THE REGION OF 500—532 nm AT ROOM TEMPERATURE

作　　者：崔执凤[1] 陈东[2] 凤尔银[1] 季学韩[1] 陆同兴[1] 李学初[3] 

机构地区：[1]安徽师范大学物理系,芜湖241000 [2]华东冶金学院工业自动化系,马鞍山243002 [3]中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023

出　　处：《物理学报》2000年第11期2151-2158,共8页Acta Physica Sinica

基　　金：国家自然科学基金 !(批准号 :9873 0 5 1);安徽师范大学专项基金资助的课题&&

摘　　要：用准分子激光抽运可调谐染料窄带激光测定了室温下NO2 分子 5 0 0— 5 32nm区高分辨荧光激发谱 ,在两个较强吸收区 5 0 5— 5 10nm和 5 13— 5 2 0nm范围内标识了 2 5个振动带 ,并作了转动分析 ,得到了相应的带头位置、转动常数和旋 转偶合常数等分子光谱常数 ,在 2 5个振动带中有 5个谱带是新发现的 ,所有得到转动分析的谱线均属于平行跃迁X～ 　2 A1—A～2 B2 ,对实验结果的分析表明电子激发态A～ 　2B2 受到基态X～　2The high\|resolution fluorescence excitation spectrum was measured in the region of 500—532?nm at room temperature.Though the spectrum was rather congested,we could determine the molecular constants such as band origins and rotational and spin\|rotation constants for 25 vibronic bands in the two most intense absorption regions 505—510?nm and 513—520?nm.Among the vibronic bands assigned there were 5 new bands observed and reported in this work.All rotational structures analyzed were of the parallel type.It was shown from the experiment that the high lying vibration levels of ground state X ～ 2A 1 had heavily perturbed the electronic excited state A ～ 2B 2.

关 键 词：激光诱导荧光激发谱 二氧化氮分子 实验 

分 类 号：O433[机械工程—光学工程]