Cs(8S)态的碰撞转移和高位原子态的激发  

Collisional Transfer of the Cs(8S) State and Excitation of High Lying Atomic States

作　　者：崔秀花[1] 穆保霞[2] 王淑英[1] 张刚台[2] 袁强华[2] 戴康[2] 沈异凡[2] 

机构地区：[1]西安交通大学理学院,陕西西安710049 [2]新疆大学物理系,新疆乌鲁木齐830046

出　　处：《光谱学与光谱分析》2007年第4期647-649,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10264004)资助

摘　　要：在Cs蒸气中,二步激发Cs原子至8S态,研究了其碰撞转移和高位原子态的产生过程。在10^16-10^17cm^-3密度范围内,测量了碰撞激发转移8S＋6S→6D＋6S的速率系数。由测得的荧光强度随密度的变化关系,得到k6D=（2.4±0.5）×10^-10cm^3.s^-1。同时研究了碰撞能量合并过程5D＋5D→nL＋6S（nL=9D,11S,7F）,5D态是由8S→7P→5D的辐射跃迁产生的。由以前测量过的6P＋5D→6S＋7D的转移速率系数以及6P态的原子密度,结合荧光强度比得到碰撞能量合并过程的速率系数,对于9D,11S和7F各态,其平均值分别为（6.4±3.2）×10^-10,（1.0±0.5）×10^-10和（8.4±4.2）×10^-10cm^3.s^-1。Using selective stepwise excitation of the cesium 8S atomic level in Cs vapor, the collisional transfer and the population of the high-lying atomic states were studied in detail. At cesium densities of 10^16-10^17 cm^-3 , the rate coefficient of excitation eollision[i, e. , 8S＋6S→6D＋6S] was measured. Measurement of fluorescence intensities as a function of Cs density yields k6D= （2.4±0. 5）× 10^-10cm^3 ·s^-1. The 5D state was populated by the 8S→7P→5D transitions. The energy pooling collisions 5D＋5D→nL＋6S （nL=9D, 11S, 7F） were also studied. The rate coefficients were measured relative to the known rate coefficient of the collision [i. e. 6P＋5D→6S＋TD]. The densities of 6P state were combined with measured fluorescence ratios to determine rate coefficients for EP process. The average values （in unites of 10^-10cm^3 · s^-1） for nL=9D, 11S and 7F are 6.4± 3.2, 1.0±0. 5 and 8.4±4. 2, respectively.

关 键 词：激光光谱 荧光 速率系数 CS原子 

分 类 号：O562.5[理学—原子与分子物理]