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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Electron recombination in ionized liquid argon: A computational approach based on realistic models of electron transport and reactions
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Electron recombination in ionized liquid argon: A computational approach based on realistic models of electron transport and reactions

机译：电离液氩中的电子重组：一种基于电子传输和反应的逼真的模型的计算方法

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In this work, we propose a new theoretical approach to modeling the electron-ion recombination processes in ionization tracks in liquid argon at 87 K. We developed a computer simulation method using realistic models of charge transport and electron-ion reactions. By introducing the concept of one-dimensional periodicity in the track, we are able to model very large cylindrical structures of charged particles. We apply our simulation method to calculate the electron escape probability as a function of the initial ionization density in the track. The results are in quantitative agreement with experiment for radiation tracks of relatively high ionization density. At low ionization densities, the simulation results slightly overestimate the experimental data. We discuss possible reasons for this disagreement and conclude that it can be explained by the role of α tracks (short tracks of secondary electrons) in electron-ion recombination processes. We introduce an approximate model that takes into account the presence of α tracks and allows the experimental data obtained from a liquid-argon ionization detector to be reproduced over a wide range of ionization density.
机译：在这项工作中，我们提出了一种新的理论方法来对87 K的液氩中电离迹中的电子离子重组过程进行建模。我们使用电荷传输和电子离子反应的现实模型开发了一种计算机模拟方法。通过在轨道中引入一维周期性的概念，我们可以对带电粒子的非常大的圆柱结构进行建模。我们应用我们的模拟方法来计算电子逃逸概率，该逃逸概率是轨道中初始电离密度的函数。该结果与相对较高电离密度的辐射径迹的实验定量吻合。在低电离密度下，仿真结果会稍微高估实验数据。我们讨论了引起这种分歧的可能原因，并得出结论，可以用α径迹（二次电子的短径迹）在电子离子重组过程中的作用来解释。我们引入一个考虑到α轨道的存在的近似模型，并允许从液氩电离检测器获得的实验数据在很宽的电离密度范围内再现。

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