Abstract

The deceleration of fast heavy ions in matter to a complete stop is accompanied by a change in their equilibrium mean charge, which depends on the velocity that decreases as the distance passed increases. A method is proposed for calculating the dependence of the mean ion charge on the thickness of the passed layer of matter, based on the previously proposed power-law approximation for inelastic energy losses. An important role for the successful description of ion energy losses is played by determining the maximum value of energy losses for different ions in various media. The dependence of the maximum energy loss and ion velocity, at which this maximum is observed, on the nuclear charges of incident ions and target atoms is considered. Analytical expressions are obtained for calculating the energy losses and mean charges for ions from boron to neon depending on the thickness of the passed layer of the substance in carbon and silicon.

中文翻译：

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物质中重离子减速时的平均电荷变化

摘要

物质中快速重离子减速到完全停止的过程伴随着它们的平衡平均电荷的变化，这取决于随着通过距离的增加而降低的速度。基于先前提出的非弹性能量损失的幂律近似，提出了一种计算平均离子电荷对物质通过层厚度的依赖性的方法。通过确定各种介质中不同离子的能量损失最大值，对成功描述离子能量损失起着重要作用。考虑到最大能量损失和离子速度（在该速度下观察到最大）与入射离子和目标原子的核电荷的相关性。