理想和非理想等离子体中的截止距离和经典能量平均电子-离子动量输运截面
On the Cut-off Distance and the Classical Energy-averaged Electron-ion Momentum Transport Cross Section in Ideal and Nonideal Plasmas
摘要：
在截止理论中，广泛使用与速度无关的距离作为截止碰撞参量以及卢瑟福散射公式来解释等离子体环境中的电荷屏蔽，这体现了明显的不一致性。一个新的物理合理的选择的截止距离的介绍，并用于推导出一个封闭的形式表示的有效动量传输截面。一个简单的近似本库仑对数，特殊功能的自由，也提出和评估。与实验恢复的数据相比，减少库仑电导率显示更好的协议和更好的物理行为，目前的表达式相比，以前的截止表达式在文献中。
英文摘要：
The wide use of a speed-independent distance as a cut-off impact parameter together with Rutherford's scattering formula, within the cut-off theory, to account for charge screening in plasma environment embodies a clear inconsistency. A new physically justified choice of the cut-off distance is introduced and used to derive a closed form expression for the effective momentum transport cross section. A simple approximation for the present Coulomb logarithm, free of special functions, is also presented and assessed. A comparison with experimentally recovered data for the reduced Coulomb conductivity showed better agreement and better physical behavior of the present expressions compared to previous cut-off expressions in the literature.
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