中低Z元素等离子体辐射不透明度的计算

Calculation of radiative opacities for medium and low Z plasmas

在局部热动平衡下,采用改进过的平均原子模型的解析式对Fe、Al等离子体在温度、密度较高时的不透明度进行计算.并考虑到元素序数、温度和密度对不透明度的不同影响,引入了一个经验性的修正因子对束缚-束缚跃迁谱线的线宽进行了修正,修正后的不透明度的计算值更接近实验值.

Under local thermodynamic equilibrium conditions (LET), the improved average atomic model is used to calculate opacities of Fe and Al plasmas at higher temperature and density. Considering the different effects of element order, temperature, and density on opacities, an experiential factor is introduced to modify the width of line-shape in bound-bound transition. The calculations with modification factor show a better fit to the experiments than those without modification.