Impacts of a power-law non-thermal electron tail on the ionization and recombination rates
Impacts of a power-law non-thermal electron tail on the ionization and recombination rates
复制标题
幂律非热电子尾对电离率和复合率的影响
DOI：
10.1051/0004-6361:20010667
复制
发表时间：
2001
影响因子：
6.5
通讯作者：
A. Decourchelle
中科院分区：
文献类型：
--
作者：
D. Porquet;M. Arnaud;A. Decourchelle
我们研究了非热电子布居对电离和复合速率的影响。所考虑的电子分布被削弱为低于破缺能Eb的麦克斯韦函数和高于该能量的指数的幂函数。我们计算了碰撞(直接电离和激发自电离)电离率以及(辐射和双电子)复合速率。给出了计算这些费率的实用方法，以便很容易地包含在计算机代码中。电离率对非{热电子布居数非常敏感，并且可以根据温度和幂函数(Eb和)的参数增加几个数量级。非热电子对(辐射和双电子)复合速率的影响要小得多。测定了C、N、O、Ne、Mg、Si、S、Ar、Ca、Fe、Ni等元素的平均电荷，作为断裂能和幂指数的不同取值。电离平衡是显著的，而电离等离子体的电离平衡较小。
We have investigated the eects of a non{thermal electron population on the ionization and recombina- tion rates. The considered electron distribution is dened as a Maxwellian function below a break energy Eb and as a power{law function of index above this energy. We have calculated the collisional (direct and excitation autoionization) ionization coecient rates as well as the (radiative and dielectronic) recombination rates. Practical methods are given to calculate these rates in order to be easily included in a computer code. The ionization rates are very sensitive to the non{thermal electron population and can be increased by several orders of magnitude depending on the temperature and parameters of the power{law function (Eb and ). The non{thermal electrons have a much weaker eect on the (radiative and dielectronic) recombination rates. We have determined the mean electric charge of elements C, N, O, Ne, Mg, Si, S, Ar, Ca, Fe and Ni for dierent values of the break energy and power{law index. The ionization balance is aected signicantly, whereas the eect is smaller in ionizing plasmas.
DOI：
10.1086/312945
发表时间：
2000-07
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
J. Hughes;C. Rakowski;A. Decourchelle
通讯作者：
J. Hughes;C. Rakowski;A. Decourchelle
来自古老超新星遗迹的 TeV Y 射线
DOI：
--
发表时间：
2006
期刊：
Monthly Notices of the Royal Astronomical Society 371
影响因子：
--
作者：
Katsukawa;et. al.;R. Yamazaki
通讯作者：
R. Yamazaki