Opacity calculations for Non-Local-Thermodynamic-Equilibrium plasmas  

作　　者：逄锦桥 WU Ze-qing YAN Jun HAN Guo-xing 

机构地区：[1]Institute of Applied Physics and Computational Mathematics,P.O.Box 8009-57,Beijing 100088,P R China [2]Laboratory of Computational Physics

出　　处：《原子与分子物理学报》2004年第B04期169-171,共3页Journal of Atomic and Molecular Physics

基　　金：This work is supported by the National Natural Science Foundation of China(10175011).

摘　　要：In this paper, we presented a method to calculate the spectral-resolved opacity for Non-Local-Thermodynamic-Equilibrium (non-LTE) plasmas. By solving the rate equations, we get the population. In the rate equations, configuration-averaged rate coefficients are used and the cross sections are calculated based on the first-perturbation theory. Using the detailed configuration accounting with the term structures treated by the unresolved transition array model, we calculated the spectral-resolved opacity of Al plasmas. The results are compared with those of other theoretical models. From the comparison, we can see that the present results fit well with other models for low-Z plasmas. For high-Z plasmas, we will give detailed discussion in the future.In this paper, we presented a method to calculate the spectral-resolved opacity for Non-Local-Thermodynamic-Equilibrium (non-LTE) plasmas. By solving the rate equations, we get the population. In the rate equations, configuration-averaged rate coefficients are used and the cross sections are calculated based on the first-perturbation theory. Using the detailed configuration accounting with the term structures treated by the unresolved transition array model, we calculated the spectral-resolved opacity of Al plasmas. The results are compared with those of other theoretical models. From the comparison, we can see that the present results fit well with other models for low-Z plasmas. For high-Z plasmas, we will give detailed discussion in the future.

关 键 词：OPACITY Non-local-thermodynamic-equilibrium (non-LTE) Unresolved-transition-array(UTA) 

分 类 号：O562.3[理学—原子与分子物理] O539[理学—物理]