内壳层洞态原子辐射退激发过程的理论研究

内壳层洞态原子的能级结构和辐射退激发过程是原子物理学研究的热点领域之一。开展此研究，可以理解电子关联、相对论和量子电动力学效应对该奇异原子的结构和跃迁性质的影响，检验多体量子理论，揭示原子中的电子角动量耦合规律，也可为天体和实验室等离子体的温度、密度和离化度分布提供重要的诊断信息，为等离子体理论建模提供必要的原子数据。本项目将采用多组态Dirac-Fock、限制性活动空间和相对论组态相互作用方法，系统研究相对论、电子关联和量子电动力学效应对内壳层洞态原子的能级结构和辐射退激发过程的影响；建立恰当的描述洞原子态的电子关联模型；探索内壳层洞态原子辐射退激发通道的竞争关系，为在大科学装置HIRFL平台上观测X射线谱提供理论预言。本项目的实施，可为HIRFL上的高精度X射线光谱实验提供必要的参考、指导和分析，也可以深入理解内壳层洞态的物理机制和相互作用，并为其它应用提供高精度的基础原子数据。

The energy structure and radiative decay processes of the inner-shell hole state are one of the hot subject of atomic physics. Investigations on it are helpful to explain the effects of electron correlation, relativity and quantum electro-dynamics on the energy structure and radiative transition of these exotic atoms. It is also helpful to reveal the situation of the electron coupling in the complex atom system. For the astrophysics and laboratory plasma, some important diagnosis information, such as the composition, temperature, density and the charge state distribution were provided by these basic atomic physics processes. It is also important to obtain the highly accurate atomic data which is crucial to the plasma modeling. The Multi-Configuration Dirac-Fock method combined with the restricted active space method and relativistic configuration interaction method will be used to investigate the effects of the electron correlation, relativity and quantum electro-dynamics on the energy structure and radiative transitions from the inner-shell hole state systematically. A reasonable, appropriate electron correlation model will be constructed for describing the complex electron correlation effects in the inner-shell hole state. The competition among the radiative decay channels from the inner-shell hole state will be studied to provide the reference and instruction for the experimental high precision X-ray spectrum in HIRFL. Some necessary reference, instruction and analysis for the high precision X-ray spectrum in HIRFL are expected when the project accomplished. It is also expected to have more comprehensive understanding on the physical mechanism and interaction of the inner-shell hole state. Some fundamental atomic data with high precision will be provided for the future potential application.