作　　者： ; ; ; ; ;

机构地区： 华北电力大学

出　　处： 《光电子．激光》 2003年第7期756-759,共4页

摘　　要： 用Nd :YAG激光器泵浦光学参量发生放大器做激发源 ,利用激光诱导荧光光谱技术得到NO分子在 2 0 0～ 370nm范围内的荧光光谱 ,谱线峰值归属于A2 (v′=1)→X2 ∏ (v” =1,3～ 11)跃迁 ,用最小二乘法拟合获得NO分子X2 ∏态振动常数 ,计算出平衡位置的力常数k。通过测量NO分子在不同气压下A2 →X2 ∏跃迁的时间分辨谱 ,得到A2 (v′=1)态的自然寿命为 180ns。结果可为用激光诱导荧光光谱技术探测大气污染物NO分子提供理论及实验参考。 Two photon laser induced fluorescence (TP LIF) spectrum of NO molecule was obtained in the spectral region 200～370 nm with excitation wavelength of 429.4 nm.The fluorescence spectrum forms a progression by A 2(v′=1)→X 2∏(v'=1,3～11) transition in the observation wavelength range.Some molecule constants of the ground state about NO molecule were calculated.The spontaneous radiant lifetime of NO molecule which is in the excited state A 2 was measured by fitting the curve of lifetime versus pressure.It is about 180 ns.The results can provide good infromation for the detection of NO molecule.

关 键 词： 双光子 激光诱导 荧光光谱 辐射寿命 分子常数

领　　域： [机械工程] [理学] [理学]