DTA模型计算高温Fe等离子体的辐射不透明度  

Calculation of Hot Iron Plasma Using Detailed Term Accounting(DTA) Model

作　　者：靳奉涛[1] 曾交龙[1] 袁建民[1] 

机构地区：[1]国防科技大学理学院应用物理系,湖南长沙410073

出　　处：《计算物理》2004年第2期121-124,共4页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(19974075);国家杰出青年科学基金(10025416)资助项目

摘　　要：　使用DTA(detailedtermaccounting)模型计算了温度为20eV、密度为0 01g·cm-3的Fe等离子体的辐射不透明度.对于处于局域热动平衡(localthermodynamicequilibrium,LTE)下的Fe等离子体,使用Saha方程计算出各价离子的丰度.使用MCHF方法得到了Fe离子的能级以及束缚 束缚跃迁的振子强度,考虑了Doppler展宽和碰撞展宽的谱线展宽机制,谱线线型采用Voigt线型.束缚 自由以及自由 自由吸收截面分别使用DCA及AA模型得到.所得的结果与美国LosAnamosNationalLaboratory(LANL)使用LEDCOP程序计算的结果进行了对比,两种结果符合很好.Detailed term accounting (DTA) model was applied to calculate the radiative opacity of hot iron plasma, which had a temperature of 20 eV and a density of 0.01 g/cm3. In case of local thermodynamic equilibrium (LTE), Saha equation was used to calculate the populations of iron ions. The energy levels and oscillator strengths of bound-bound transitions were obtained by the multiconfiguration Hartree-Fock (MCHF) method. The Doppler broadening and electron impact broadening had been considered and the Voigt line profile had been applied in our calculation. We used the detailed configuration accounting (DCA) model and average atom model (AA) to obtain the bound-free and free-free absorptions respectively. The comparison between the present work result and Los Alamos National Laboratory (LANL) result shows a good agreement.

关 键 词：DTA模型 辐射不透明度 铁等离子体 天体物理 粒子数分布 

分 类 号：P142[天文地球—天体物理]