Accurate transition amplitudes for the capture and emission of electrons in open-shell atoms

开壳原子中电子捕获和发射的精确跃迁振幅

• 批准号: 25146345
• 负责人: Professor Dr. Stephan Fritzsche
• 金额: --
• 依托单位: Theoretisch-Physikalisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/25146345?language=en
• 关键词: Accurate; transition; amplitudes; capture; emission

During the last decade, the RATIP program has been developed for studying the level structures and properties of open-shell atoms and ions. For many atomic processes, which include the emission or the capture of electrons, this program has become today quite a standard within the framework of relativistic atomic theory. To enlarge the capabilities of the RATIP program, however, a number of improvements are desirable in order to support the interpretation of high-resolution experiments in the future. Presently, the main requests concern (i) the numerical presentation of the electron continuum and the scattering states as needed, for example, for the accurate computation of (Auger and photoionization) transition amplitudes as well as (ii) the use and combination of these amplitudes within the concepts of the density matrix theory. For many ionization processes, in addition, (iii) the rearrangement of the electron density need to be taken into account in order to obtain a better understanding of the intensities and shake processes as observed by experiment. The principal aim of the project is therefore to search for new techniques which, apart from the level energies, may help in providing accurate atomic transition ampitudes.

在过去的十年中，RATIP程序已经开发用于研究开壳原子和离子的能级结构和性质。对于许多原子过程，包括电子的发射或捕获，这个程序今天已经成为相对论原子理论框架内的相当标准。然而，为了扩大RATIP计划的能力，为了支持未来高分辨率实验的解释，需要进行一些改进。目前，主要的要求是关注(i)电子连续统和散射态的数值表示，例如，为了精确计算（俄热和光电离）跃迁振幅，以及（ii）在密度矩阵理论的概念中使用和组合这些振幅。此外，对于许多电离过程，（iii）为了更好地理解实验观察到的强度和振荡过程，需要考虑电子密度的重排。因此，该项目的主要目的是寻找新的技术，除了能级能量之外，可能有助于提供准确的原子跃迁幅度。