441.6nm激光激发Cs蒸汽的荧光光谱研究  

Study of the fluorescence spectrum of cesium vapor excited by the laser of 441.6nm line

作　　者：周小岩[1] 雷振宙[1] 刘静[1] 戴康[1] 沈异凡[1] 

机构地区：[1]新疆大学物理系,乌鲁木齐830046

出　　处：《激光杂志》2004年第1期39-40,共2页Laser Journal

基　　金：国家自然科学基金资助项目 (10 2 64 0 0 4)

摘　　要：利用He -Cd激光器的 44 1.6nm线光解Cs2 分子 ,使Cs(7P ,6D)得到布居 ,在Cs原子密度 1～ 9× 10 1 5cm- 3范围内 ,测量原子荧光对分子荧光的强度比 ,得到了碰撞转移速率系数与预解离率之比。精细结构碰撞转移 [即过程Cs(7P1 2 ) +Cs(6S)Cs(7P3 2 ) +Cs(6S) ]截面为 3 .5× 10 - 1 4cm2 。Populations of the n 2L(nL=7p,6D)states of Cs atoms by photodissociation of Cs_2 molecules through the use of the fixed frequence line 441.6nm of a He-Cd laser radiation are produced.Combining ratios of atomic to molecular fluorescence at the Cs density range between 1 and 9×10 15 cm -3 ,the ratios of collisional excitation transfer rate coefficients and the predissociation rates are obtained.The cross section for the fine-structure-changing collision [i.e,Cs(7P_ 1/2 )+Cs(6S)Cs(7P_ 3/2 )+Cs(6S)]is 3.5×10 -14 cm 2.

关 键 词：光解离 速率系数 分支比 截面 Cs蒸汽 荧光光谱 激光 

分 类 号：O561.5[理学—原子与分子物理]