Tridyn-binary collision simulation of atomic collisions and dynamic composition changes in solids

Abstract A computer program is described which treats the slowing down of ions in solids, and the associated formation of recoil atom cascades in the binary collision approximation. For multicomponent media, it takes into account dynamic alterations of the local composition which arise from the deposition of implanted ions and the collisional transport of target atoms. In this way, phenomena can be simulated which occur during high-fluence ion bombardment, such as implantation profiles, atomic mixing ... Title of program: TRIDYN (VERSION 3.1) Catalogue Id: ABFH_v1_0 Nature of problem A beam of fast ions (energy range app. 1 eV/amu to 100 KeV/amu) entering a solid substance is slowed down and scattered due to electronic interaction and nuclear collisions. Along its path, an individual projectile may create fast recoil atoms which in turn may initiate collision cascades of moving target atoms. These may either leave the surface (be sputtered) or be deposited at a site different from their original one. Together with the projectiles being deposited in the substance, this result ... Versions of this program held in the CPC repository in Mendeley Data ABFH_v1_0; TRIDYN (VERSION 3.1); 10.1016/0010-4655(88)90148-8 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)# 摘要 本文介绍一款基于二元碰撞近似（binary collision approximation）的计算机程序，可用于模拟固体中的离子慢化过程，以及该过程伴随产生的反冲原子级联（recoil atom cascades）形成过程。针对多组分介质（multicomponent media），该程序可考虑由注入离子沉积以及靶原子碰撞输运所引发的局部组分动态变化。借此，能够模拟高通量离子轰击过程中出现的各类现象，例如注入剖面、原子混合…… 程序名称：TRIDYN（版本3.1） 目录编号：ABFH_v1_0 ## 问题本质 一束快离子（能量范围约1电子伏特每原子质量单位至100千电子伏特每原子质量单位）入射固体后，会因电子相互作用与核碰撞而发生慢化与散射。在其行进路径中，单个入射粒子可产生快反冲原子，这些反冲原子继而可引发运动靶原子的碰撞级联。这些靶原子既可能逸出表面（即被溅射），也可能沉积在与其初始位置不同的位点。连同沉积在固体内的入射粒子一同来看，该过程的结果…… 该程序在Mendeley数据平台的CPC库中的存档版本： ABFH_v1_0；TRIDYN（版本3.1）；10.1016/0010-4655(88)90148-8 本程序源自贝尔法斯特女王大学所维护的CPC程序库（1969-2019年）。