论文标题
使用连续碰撞模型研究的电离等离子体中多电子原子的种群动力学
Population kinetics of many-electron atoms in ionizing plasmas studied using a continuous collisional radiative model
论文作者
论文摘要
基于\ textit {ab intib}原子结构计算的碰撞 - 辐射（CR）模型已在20年内用于分析多电子原子和离子光谱。尽管使用CR模型计算了激发态在等离子体及其发射光谱中的种群分布，但仍缺乏对种群动力学的系统和分析理解。 ％ 在这项工作中，我们提出了许多电子原子离子中种群动力学的减少模型，在该模型中，我们通过连续CR模型（CCRM）近似复杂的多电子原子的密集能量结构。使用这种简化，我们显示了等离子体中多电子原子及其电子密度和温度依赖性的分析种群分布。 ％ 特别是，CCRM表明，等离子体中多电子原子的高度激发态的种群分布类似于玻尔兹曼的分布，但具有有效的激发温度。我们还显示了三个典型电子密度区域和两个电子温度区域的存在，其中激发温度的参数依赖性不同。还提供了有效激发温度和这些阶段边界的分析表示。
Collisional--radiative (CR) models based on \textit{ab initio} atomic structure calculation have been utilized over 20 years to analyze many-electron atomic and ionic spectra. Although the population distribution of the excited states in plasmas and their emission spectra are computed using the CR models, systematic and analytical understanding of the population kinetics are still lacking. % In this work, we present a reduced model of the population dynamics in many-electron atomic ions, in which we approximate the dense energy structure of complex many-electron atoms by a continuum, a continuous CR model (CCRM). Using this simplification, we show an analytical population distribution of many-electron atoms in plasmas and its electron-density and temperature dependence. % In particular, the CCRM shows that the population distribution of highly excited states of many-electron atoms in plasmas resembles a Boltzmann distribution but with an effective excitation temperature. We also show the existence of three typical electron-density regions and two electron-temperature regions where the parameter dependence of the excitation temperature is different. Analytical representations of the effective excitation temperature and the boundaries of these phases are also presented.
