Investigation of vicinage effect of fast cluster ions by a Coulomb-explosion imaging and secondary-electron measurement

用速度大于玻尔速度的分子/簇离子轰击固体引起的二次电子发射的邻近效应是离子-固体相互作用物理学中尚未解决的问题之一。在这项研究中，我们证明了对SE发射的邻近效应包括两个贡献：一个来自散射电子的产生过程，另一个来自散射电子的输运过程，并且主要贡献取决于离解离子之间的核间距离。

Vicinage effect on secondary-electron (SE) emissions from a solid induced by bombardment with molecular/cluster ions having faster velocity than the Bohr velocity is one of the open questions in the physics of ion-solid interaction. In this study, we demonstrate that the vicinage effect on SE emissions consists of two contributions: one originates from the production process of scattered electrons, the other originates from the transport process of the scattered electrons, and the dominant contribution depends on an internuclear distance between the dissociated ions.