NO_2分子激光诱导荧光辐射寿命和碰撞猝灭速率的实验研究  

An experimental study on laser induced fluorescence radiative lifetimes and collisional quenching rates of NO_2

作　　者：凤尔银[1] 崔执凤[1] 陈东[1] 季学韩[1] 赵献章[1] 李学初 

机构地区：[1]安徽师范大学物理系光谱与材料研究室,芜湖241000 [2]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：《原子与分子物理学报》2000年第2期197-203,共7页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金!(2 98730 5 1);安徽省教委自然科学基金资助

摘　　要：实验测定了激发波长在 591～ 594nm范围 ,压力在 0 .1～ 15Pa时 ,NO2 分子激光诱导荧光衰减曲线 ,作几何修正后应用Stern Volmer模型 ,得到了零压辐射寿命τ0 ( =1/k0 )和碰撞猝灭速率常数kq,结果与文献报道基本一致。对NO2 分子激发态能级的反常长寿命和一定压力下出现的双指数衰减等进行了较详细的讨论。The radiative lifetimes of NO 2 excited by tunable dye laser are measured, for excitation wavelengths ranging from 591 to 594 nm, at sample pressures between 0.1 and 15 Pa. The recorded fluorescence decay curves were geometrically corrected. Stern volmer model was used to give zero pressure radiative lifetimes τ 0 and collisional quenching rate constants k q,τ 0 are in rough agreement with previous measurements. Anomalous long lifetimes of excited state levels of NO 2 and two exponential decays under special pressure condition were discussed.

关 键 词：荧光辐射寿命 碰撞猝灭常数 二氧化氮分子 激光 

分 类 号：O561.4[理学—原子与分子物理] O613.61[理学—物理]