溴的光电离和辐射复合——平均原子模型速率系数与细致组态速率系数  

Photonionization and radiative recombination of Br——Comparison of rate coefficients deduced form the average atom and detailed configuration models

作　　者：刘凌涛[1] 王民盛[1] 韩小英[2] 李家明[1] 

机构地区：[1]上海交通大学物理系,上海200030 [2]清华大学物理系原子分子纳米科学教育部重点实验室,北京100084

出　　处：《物理学报》2006年第5期2322-2327,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10314010);国家重点基础研究(批准号:2001CB610508);国家高科技ICF项目资助的课题~~

摘　　要：根据原子自洽场理论(即DCA),计算了溴原子各种电离度各个壳层的DCA约化光电离截面.与AA模型的平均电子轨道约化光电离截面进行比较,总结出其内在规律.在AA的约化光电离截面的基础上,可以得到电离度分辨的DCA约化光电离截面;进而可以得到细致组态的光电离和辐射复合速率系数.为精密地描述非局域热动平衡(n-LTE)等离子体提供必要的基础.For practical purposes, the ionic stage and populations of hot dense plasma are often described by the average atom（AA） model instead of the detailed average configuration accounting（DCA） model, which is more close to the reality. According the atomic self-consistent field theory, we calculate the DCA reduced photonionization cross-sections of every subshell of Br ions in different ionic stages. Comparing these DCA reduced cross-sections with the reduced photonionization cross-secion of the corresponding average electronic orbital in the AA model, we deduce the inherent nlles between the reduced cross-sections. Based on the AA reduced photonionization cross-section, the DCA reduced photonionization cross-sections and detailed configuration rate coefficients of photonionizaiton and radiative recombination can be calculated. This work is a necessary preparation for accurate description of non-local thermal equilibrium（n-LTE） plasma.

关 键 词：光电离 速率系数 平均原子模型 

分 类 号：O536[理学—等离子体物理]