Cross-section and rate formulas for electron-impact ionization, excitation, deexcitation, and total depopulation of excited atoms
Cross-section and rate formulas for electron-impact ionization, excitation, deexcitation, and total depopulation of excited atoms
复制标题
电子碰撞电离、激发、去激发和受激原子总数量减少的横截面和速率公式
DOI：
10.1103/physreva.22.940
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发表时间：
1980
影响因子：
2.9
通讯作者：
A. Smeets
中科院分区：
文献类型：
--
作者：
Leendert Vriens;A. Smeets
对于主要来自激发原子态的电子诱导电离、激发和去激发，详细分析了横截面和速率系数对电子能量和温度以及原子参数的依赖性。涵盖了广泛的能量范围，包括突然碰撞和绝热碰撞。通过结合现有的实验和理论信息，为上述过程的横截面和速率系数、总人口减少和三体重组构建了一组简单的分析公式。这些公式解释了与经典和半经典标度的巨大偏差，如激励所发现的那样。它们在各自的有效性范围内与实验数据和理论一致，但比单独的理论具有更广泛的有效性。简单的分析形式进一步促进了等离子体建模中的应用。
For electron-induced ionization, excitation, and de-excitation, mainly from excited atomic states, a detailed analysis is presented of the dependence of the cross sections and rate coefficients on electron energy and temperature, and on atomic parameters. A wide energy range is covered, including sudden as well as adiabatic collisions. By combining the available experimental and theoretical information, a set of simple analytical formulas is constructed for the cross sections and rate coefficients of the processes mentioned, for the total depopulation, and for three-body recombination. The formulas account for large deviations from classical and semiclassical scaling, as found for excitation. They agree with experimental data and with the theories in their respective ranges of validity, but have a wider range of validity than the separate theories. The simple analytical form further facilitates the application in plasma modeling.