金等离子体平均离化度随电子温度变化关系的研究

用Cowan的原子结构从头算程序和自旋轨道劈裂阵模型计算各阶电离的金离子能级和跃迁， 在碰撞辐射模型下求解能级布居数方程，计算给定等离子体密度和电子温度下等离子体中离子的分布，给出了平均离化度随电子温度的变化关系.发现稀薄的金等离子体中，在一定的电子温度范围内电子温度的升高平均电离度反而下降的反常现象.讨论了电离势对平均离化度的影响. 关键词： 金等离子体 碰撞辐射模型 布居数 平均电离度

Study on the relationship of average ionization stage with the electron temperat ure for Au laser produced plasma

A collisional radiative model based on the spin-orbit-split-arrays was developed and used to determine the charge state distributions. The atomic structure code of Cowan and the spin-orbit-split-arrays model is used to calculate all the emission spectra of the different gold species, and a non-local thermodynamic eguilibrium model is coupled to calculate the ion populations and the charge state distributions at a given density and temperature. The relationship between average charge state and the electron temperature is given.In general, the avera ge charge state increases with electron temperature, except between 3800 and 390 0 eV. The reason for this unusual region is that the ionization potential increa ses much sharply between Au51 and Au52.