电子与高电荷态离子碰撞过程中相关角向特性的理论研究

项目名称： 电子与高电荷态离子碰撞过程中相关角向特性的理论研究

项目编号： No.11464040

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 师应龙

作者单位： 天水师范学院

项目金额： 48万元

中文摘要： 高电荷态离子广泛存在于天体等离子体、实验室等离子体以及热核聚变等离子体中。研究电子与高电荷态离子碰撞中的角向特性不仅对发展和检验高精度的原子结构理论、揭示强库仑场中复杂原子（离子）的动力学性质和机制有着重要意义，而且也为等离子体状态的精确诊断、光谱的模拟和形成机制的判断以及核聚变反应堆的研究等提供非常重要的科学依据。本项目拟在多组态Dirac-Fock方法、相对论扭曲波方法和密度矩阵理论框架下，利用部分已有程序包(GRASP92/2K,RATIP)，建立一套能够系统研究高电荷态离子的双电子复合、辐射复合及电子碰撞激发等过程中相关角向特性的理论方法和计算程序。探讨各种相互作用（电子-电子、电子-辐射场）和相对论效应等对辐射谱线和Auger电子角向特性的影响，选取与天体物理、各种聚变等离子体研究密切相关的离子体系进行精确计算，以期望对相关实际应用领域的研究提供必要的理论依据和帮助。

中文关键词： 高电荷态离子；角分布和极化特性；相对论效应；碰撞动力学

英文摘要： Highly charged ions widely exist in astrophysical plasmas, laboratory plasma and thermonuclear fusion plasmas. The studies on the angular properties in collision between electron and highly charged ions, which is significant not only for the development and testing of high-precision atomic theory, revealing the kinetic characteristic and mechanisms of complex atoms (ions) in a strong Coulomb field, but also provides a very important scientific basis for the accurate diagnosis of the plasma state, spectral simulation, determine the line formation mechanism and the research of fusion reactor. Based on the relativistic multi-configuration Dirac-Fock (MCDF) method, the fully relativistic distorted-wave method and the density matrix theory and some of the existing programs (GRASP92/2K,RATIP), in this project we will develop some new theoretical methods and programs to study the related angular properties in the electron collision dynamics processes of highly charged ions, such as, dielectronic recombination, radiative recombination and electron impact excitation. Systematic studies of the influences of various interactions (electron-electron,electron-radiation field) and relativistic effects on the angular distribution and polarization properties of the subsequent emitted radiative lines and Auger electrons will be carried out, and detailed calculations and analysis on angular properties of the ions interested in astrophysics and and various fusion plasmas researches will be presented. We hope that these studies can provide necessary theoretical support and help for the relevant practical application and experimental study in certain regions.

英文关键词： highly charged ions;angular distribution and polarization property;relativistic effects;collisional dynamics