U.S.-Argentina Cooperative Research: Theoretical Models forRadiation-Enhanced Diffusion During Ion Implantation

该奖项支持由弗吉尼亚理工学院的戴安娜·法卡斯和布宜诺斯艾利斯原子能委员会的E·J·萨维诺在凝聚态理论方面进行的合作研究。将为离子注入合金化和离子束混合过程中发生的传输机制建立理论模型。合作始于集中在现象学模型上，现在建议研究辐射过程中发生的特殊传输机制。从碰撞混合的蒙特卡罗模拟开始，包括成分的动态变化，这项研究将继续观察注入过程中由于点缺陷而产生的偏析效应，并研究层状结构中的离子束混合。这次合作卓有成效，在好的期刊上发表了几篇论文。S是辐射效应和杂质缺陷相互作用的理论分析专家，在陶瓷、半导体以及金属和合金等领域有着广泛的应用。

This award supports cooperative research in condensed matter theory to be carried out by Diana Farkas of the Virginia Polytechnic Institute and E.J. Savino of the Atomic Energy Commission in Buenos Aires. Theoretical models will be developed for transport mechanisms that occur during ion implantation alloying and ion beam mixing. The collaboration began with concentrating on phenomenological models and it is now proposed to study the particular transport mechanisms that occur during irradiation. Starting with Monte Carlo simulation of collisional mixing, including dynamic compositional changes, the study will proceed to look at segregation effects during implantation due to point defects and investigate ion beam mixing in layered structures. The collaboration has been productive, resulting in several papers in good journals. Both the P.I.'s are recognized as experts in theoretical analysis of radiation effects and impurity defect interactions. The research area has wide application in ceramics and semiconductors as well as in metals and alloys.