慢惰性气体原子与固体表面电荷交换的俄歇中和和电离过程
Auger neutralization and ionization processes for charge exchange between slow noble gas atoms and solid surfaces
摘要:
原子或分子与表面之间的电子和能量转移过程对于物理和化学中的许多应用是极其重要的。因此,为了分析各种各样的物理系统,深刻理解这些过程是必不可少的。双电子俄歇过程的微观描述,导致在固体表面前的离子/中性原子的中和/电离,一直是一个长期存在的问题。它可以追溯到20世纪50年代,当时H。D. Hagstrum建议使用慢惰性气体离子中和过程中发射的电子光谱中所含的信息,作为补充光电子能谱学的表面分析工具。然而,直到最近的俄歇中和机制的综合描述已经取得了理论和实验方法的共同努力。在这篇文章中,我们回顾了这个问题的理论模型,强调他们的结果与实验结果相比。我们还分析了俄歇电离的逆问题。我们强调的关键数量的管理过程的理解,并概述了仍然存在的挑战。这为该领域的理论和实验工作的未来发展开辟了新的前景。
英文摘要:
Electron and energy transfer processes between an atom or molecule and a surface are extremely important for many applications in physics and chemistry. Therefore a profound understanding of these processes is essential in order to analyze a large variety of physical systems. The microscopic description of the two-electron Auger processes, leading to neutralization/ionization of an ion/neutral atom in front of a solid surface, has been a long-standing problem. It can be dated back to the 1950s when H. D. Hagstrum proposed to use the information contained in the spectrum of the electrons emitted during the neutralization of slow noble gas ions as a surface analytical tool complementing photoelectron spectroscopy. However, only recently a comprehensive description of the Auger neutralization mechanism has been achieved by the combined efforts of theoretical and experimental methods. In this article we review the theoretical models for this problem, stressing how their outcome compare with experimental results. We also analyze the inverse problem of Auger ionization. We emphasize the understanding of the key quantities governing the processes and outline the challenges remaining. This opens new perspectives for future developments of theoretical and experimental work in this field.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。