Abstract

The exponential component of the electron spectrum during Ne–Ne collisions is shown to be associated with the electron transitions from the autoionization term to the continuum. The characteristics of this term have been determined. The exponential shape of the spectrum is explained by the absence of interference between the transition amplitudes as the particles come close together and fly apart due to a high transition probability. For Auger transitions in the quasi-molecule we have determined the dependence of the mean Auger transition energy on the reached internuclear distance, which agrees well with the results of energy level calculations for the Ne–Ne system, and the dependence of the weighted mean Auger transition probability on the observed electron energy E_e. We show that the transition probability decreases significantly with increasing E_e as the internuclear distance decreases, apparently, due to a decrease in the overlap integrals of the wave functions for the interacting electrons. Our analysis allows a coherent picture of ionization in collisions of intermediate-mass ions with keV energies to be formed.

中文翻译：

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Ne + -Ne碰撞过程中准分子的动态电离和俄歇跃迁

摘要

Ne-Ne碰撞过程中电子光谱的指数成分与电子从自电离项到连续体的跃迁有关。该术语的特征已经确定。光谱的指数形状可以解释为，由于粒子具有较高的跃迁几率，当粒子彼此靠近并飞散时，跃迁幅度之间不存在干扰。对于在准摩尔俄歇跃迁Ç ULE我们已确定的平均俄歇跃迁能量对达到核间距离，其与能量水平计算为氖-氖系统的结果吻合得很好的依赖性，和加权的依赖观测到的电子能量E _e的平均俄歇跃迁概率。我们表明，随着核间距的减小，跃迁几率随着E _e的增加而显着降低，这显然是由于相互作用电子的波函数的重叠积分减小所致。我们的分析允许形成中间质量离子与keV能量碰撞时电离的连贯图像。