AlI原子2D吸收谱的多通道量子数亏损理论分析

本文用多通道量子数亏损理论分析计算了AlI原子的²D吸收谱。采取具有三个不同电离阈的三个分解通道的混合模型。在适当选择了与能量有关的参数μ_α,D_α以及转换矩阵元U_iα之后,计算了第一电离阈和第二电离阈之间的²D自电离谱,并与Roig的测量结果作了比较。利用上述参数延伸到分立能域,得到²D能级的里德伯系列及其振子强度值。其结果与Lin和Weiss的分析以及相关的实验相符。 关键词：

THE 2D ABSORTION SPECTRUM OF Al I: A MQDT ANALYSIS

The Multichannel Quantum Defect Theory (MQDT) has been applied to the analysis of the ²D absorption spectrum of atomic aluminium. The model consists of the mixing of three dissociation channels with different ionization thresholds. By suitably taking the values of the eigen-parameters μ_α,D_α which depend on electron energy and on the transformation matrix elements U_iα, the ²D autoionization spectrum between the first and second ionization limits is calculated and the result is compared with Roig's measurements. Extending the se parameters to the region of discrete spectrum, we obtained the Rydberg series of ²D energy levels as well as their oscillator strengths which also coincide with the analyses of Lin and Weiss and related experiments.