NO分子A^2Σ→X^2Π双光子激光感生荧光光谱  

Two-Photon Laser-Induced Fluorescence Spectrum of NO (A^2Σ→X^2Π) Transition

作　　者：张贵银[1] 张连水[1] 杨晓冬[1] 赵晓辉[1] 李裔[1] 

机构地区：[1]河北大学物理科学与技术学院

出　　处：《光学学报》2003年第9期1119-1122,共4页Acta Optica Sinica

基　　金：河北省自然科学基金 (10 2 0 90 );华北电力大学青年科研基金资助课题

摘　　要：以Nd∶YAG激光器抽运光学参变振荡器 /光学参变放大器做为激发源 ,得到了NO分子在 2 2 0～ 35 0nm波长范围内的双光子激光诱导荧光光谱 ,并将其归属于A2 Σ(ν′ =0 )→X2 Π(ν″ =1～ 8)跃迁 ,用最小二乘法拟合获得NO分子X2 Π态振动常量″ωe =(190 4 .7± 7.3)cm-1,″ωe ″xe =(14 .2± 1.2 )cm-1,″ωe″ye=- (0 .0 2 18± 0 .0 0 91)cm-1,及平衡位置的力常量k =(1.5 99± 0 .0 12 )× 10 3 N·m-1。计算了所得跃迁谱带的弗兰克康登因子及相对荧光强度 ,结果与实验观测值相符。Two photon laser induced fluorescence spectrum (TP LIF) of NO in the wavelength range 220～350 nm is obtained by using optical parameter generator and amplifier pumped by Nd∶YAG laser as excitation source. A few stronger band can be attributed to A 2Σ(v′=0)→X 2Π(v″=1～8) transition. Some molecule constants about NO in the ground state are deduced by the spectrum. The Frank Condon factor and relative spectrum intensity are calculated. Compared with the results of experiment they are in accordance basically and a little difference is discussed. All of these can provide an important reference for monitoring of NO by the technique of laser induced fluorescence.

关 键 词：光谱学 一氧化氮分子 双光子激光 激光诱导荧光光谱 振动常量 谱线强度 跃迁谱带 

分 类 号：O433.4[机械工程—光学工程]