CdH分子基态X^2∑^+和激发态A^2П光谱和寿命测量  

The spectrum and lifetime of X^2∑^+ and A^2∏ states of CdH molecule

作　　者：吴小光[1] 张培林[1] 赵朔嫣[1] 

机构地区：[1]清华大学现代应用物理系,北京100084

出　　处：《光学学报》1993年第9期769-774,共6页Acta Optica Sinica

基　　金：国家自然科学基金;清华大学科学基金资助项目

摘　　要：采用一束激光为泵浦光另一束激光为探测光的方法,获得CdH分子A^2Π态和X^2∑^+态之间跃迁产生的具有转动结构的多个荧光谱和激发谱带.对荧光的时间分辨研究,给出A^2Π态寿命τ_0=59.5±2.3ns,对A^2Π(v=0)态Cd原子的碰撞猝灭截面为(1.31±0.03)×10^(-15)cm^2;X^2∑^+态寿命τ_0=61.0±4.6μs,引起X^2∑^+(v=0)态寿命衰减的碰撞截面为(1.1±0.1)×10^(-18)cm^2.Using pump- and- probe methods of laser spectroscopy, we observed several fluorescence and excitation bands with rotational structure of radiative transition between the A2∏ and X2∑+ states of the CdH molecule. Based on the study of time-resolution of the fluorescence, the radiative lifetime of τ 0 = 59. 5±2. 3 ns for the A2∏ state, and the cross-section of (1. 31±0. 03) × 10-15cm2for quenching the A2∏(v = 0) state by Cd collisions; τ0 =61. 0±4. 6 μs for theX2∑+ state and the cross-section of (1. 1±0. 1)× 10-18cm2for CdH molecule dissociation by Cd collisions are estimated.

关 键 词：寿命 氢化镉 基态 激发态 光谱 

分 类 号：O561.3[理学—原子与分子物理]