A classical model for multiple-electron capture in slow collisions of highly charged ions with atoms
A classical model for multiple-electron capture in slow collisions of highly charged ions with atoms
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DOI：
10.1088/0022-3700/19/18/021
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发表时间：
1986-09
期刊：
影响因子：
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通讯作者：
A. Niehaus
中科院分区：
文献类型：
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作者：
A. Niehaus
描述了离子与原子慢碰撞中多电子俘获的经典超势垒模型的一个新版本。这一版本解释了发生一定数量的电子交换的不同方式。由于不涉及自适应参数，该模型具有较强的预测能力。将绝对多重俘获截面的模型预测值与实验值进行了比较，发现模型预测值与实验值吻合较好。通过引入与速度相关的最小能量不确定度，解释了一些动力学效应。理论计算的能量增益谱和自电离电子谱的宽度与实验符合得很好。
A new version of the classical over-barrier model for multiple-electron capture in slow collisions between ions and atoms is described. This version accounts for the different ways in which an exchange of a certain number of electrons can occur. Since no adaptable parameter is involved this model has predictive power. Model predictions of absolute multiple capture cross sections are compared with experiment and are found to be in good agreement. Some dynamic effects are accounted for by introducing a velocity-dependent minimum energy uncertainty. Predicted widths of energy gain spectra and of the spectra of autoionisation electrons are found to be in reasonable agreement with experiment.