Au激光等离子体X射线发射光谱的理论研究  

Theoretical calculations of X-ray spectra of Au plasma

作　　者：唐京武[1] 黄笃之[1] 易有根[2] 

机构地区：[1]湖南科技大学物理学院,湘潭411201 [2]中南大学物理科学与技术学院,长沙410083

出　　处：《物理学报》2010年第11期7769-7774,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10275056)资助的课题~~

摘　　要：采用细致组态(detailed configuration accounting,DCA)方法和碰撞辐射模型(collisional radiative equilibriummodel),Cowan的相对论的原子结构理论程序,选取与初、末离子组态有关的平均组态,取Hartree-Fock-Slater自洽势,考虑了非局域热动力学平衡条件下等离子体的主要原子动力学过程,建立了描述等离子体中碰撞辐射模型的离子布居和能级布居的速率方程,得到了Au元素的离子分布和能级分布,电荷态分布和平均电离度,并模拟出Au激光等离子体的5f-3d跃迁的X射线发射光谱的谱线强度,计算得出的谱线强度与实验数据相比符合得较好.By using a detailed configuration accounting method in the collisional radiative equilibrium model,and Cowan＇s relativistic atomic structure code with respect to ionic averaged configurations and Hartree-Fock-Slater potential,we solve the rate equations for populations of all ionic and level populations of all excited states,in which main consider main atomic dynamic processes in a non-local thermodynamic equilibrium plasma can be considered,thereby obtaining the ionic populations and energy level populations and the ionic charge stage distribution and the average charge for Au.We also simulate and calculate the X-ray emission spectra of Au 5f—3d transition arrays.The calculated results are in good agreement with the experimental data for a well-characterized highly ionized Au plasma.

关 键 词：碰撞辐射理论 布居速率方程 平均电离度 发射光谱 

分 类 号：O536[理学—等离子体物理]