DTA模型计算高温Fe等离子体的辐射不透明度

计算物理 ›› 2004, Vol. 21 ›› Issue (2): 121-124.

DTA模型计算高温Fe等离子体的辐射不透明度

靳奉涛¹, 曾交龙^1,2, 袁建民¹

1. 国防科技大学理学院应用物理系, 湖南长沙 410073;
2. 中国科学院国家天文台, 北京 100012

收稿日期:2003-04-02 修回日期:2003-09-08 出版日期:2004-03-25 发布日期:2004-03-25
作者简介:靳奉涛(1976-),男,山东章丘,博士生,从事原子分子物理研究.
基金资助:
国家自然科学基金(19974075);国家杰出青年科学基金(10025416)资助项目

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

JIN Feng-tao¹, ZENG Jiao-long^1,2, YUAN Jian-min¹

1. Department of Applied Physics, National University of Defense Technology, Changsha 410073, China;
2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China

Received:2003-04-02 Revised:2003-09-08 Online:2004-03-25 Published:2004-03-25

摘要/Abstract

摘要： 使用DTA(detailed term accounting)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(local thermodynamic equilibrium,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Los Anamos National Laboratory(LANL)使用LEDCOP程序计算的结果进行了对比,两种结果符合很好.

关键词: 辐射不透明度, Fe等离子体, DTA模型

Abstract: Detailed term accounting(DTA) model is applied to calculate the radiative opacity of hot iron plasma,which has a temperature of 20 eV and a density of 0.01 g/cm³.In case of local thermodynamic equilibrium(LTE),Saha equation is used to calculate the populations of iron ions.The energy levels and oscillator strengths of bound-bound transitions are obtained by the multiconfiguration Hartree-Fock(MCHF) method.The Doppler broadening and electron impact broadening have been considered and the Voigt line profile has been applied in our calculation.We use 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.

Key words: radiative opacity, iron plasma, DTA model

中图分类号:

O531

靳奉涛, 曾交龙, 袁建民. DTA模型计算高温Fe等离子体的辐射不透明度[J]. 计算物理, 2004, 21(2): 121-124.

JIN Feng-tao, ZENG Jiao-long, YUAN Jian-min. Calculation of Hot Iron Plasma Using Detailed Term Accounting(DTA) Model[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2004, 21(2): 121-124.

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