K-Ar光学碰撞精细结构分支比  

Fine Structure Branching Ratio for K-Ar Optical Collision

作　　者：沈异凡[1] 李万兴[1] 

机构地区：[1]新疆大学物理系,乌鲁木齐830046

出　　处：《光谱学与光谱分析》2001年第1期38-39,共2页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金资助项目

摘　　要：用激光激发K Ar混合气体 ,KAr分子激发态离解到K 4P1/2 和 4P3/2 态 ,测定在不同Ar密度下KD1与D2 线荧光强度比 ,得到离解率之比和精细结构转移截面。An optically thin gaseous mixture of K and low-density Ar is excited by the fixed frequency line 5145 nm of the argon ion laser.The excited KAr molecule is dissociated into the K 4P 1/2 or K 4P 3/2.The branching ratio is defined as I(D 1)/I(D 2) where I(D 1) and I(D 2) are measured intensities of the atomic K D 1 and D 2 lines.The branching is determined in the Ar density range between 2 and 8×10 17 cm -3.The ratio of the dissociation rates and the fine structure changing cross section are obtained.

关 键 词：光学碰撞 精细结构 分支比 钾 氩 激光激发 氩化钾分子 离解率 

分 类 号：O561.4[理学—原子与分子物理] O561.3[理学—物理]