【摘要】 随着现代实验装置和技术的快速发展,天体物理和实验室等离子体中的原子过程及其衰变性质已成为目前国内外研究的热点问题之一.特征光谱以及Auger电子的角向关联和极化性质可以用于研究各种基本物理效应和相互作用,进而揭示原子碰撞动力学过程及其辐射和非辐射衰变性质.本文综述我们在密度矩阵理论框架下对特征光子和Auger电子的角向和极化性质的研究进展.特别地,揭示了Breit相互作用和超精细相互作用的重要性并提出了诊断光谱产生机制、分辨重叠能级分裂大小和次序以及提取同位素核参数等基础问题的光谱学方案.更多还原

【Abstract】 With rapid development of modern experimental facilities and techniques,the fundamental processes of atoms or ions and their decay properties in astrophysical and laboratory plasmas have become one of present-day hot topics.The angular correlation and polarization properties of characteristic spectra as well as Auger electrons can be employed to study various fundamental physical effects and interactions,which in turn provide a deeper understanding of atomic collision dynamics as well as radiative and nonradiative decay properties.In the present paper,we review our research progress on the field of angular and polarization properties of characteristic photons and Auger electrons within the density matrix theory.In particular,significant effect of the Breit interaction and hyperfine interaction is revealed and several spectroscopic schemes are proposed for the diagnosis of spectral production mechanism,identification of overlapping level splitting and sequence,and determination of isotope nuclear parameters.更多还原