کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1680497 1518667 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A hybrid model describing ion induced kinetic electron emission
ترجمه فارسی عنوان
یک مدل هیبریدی که الکترونهای انتشار سیگنال ناشی از یون را توصیف می کند
کلمات کلیدی
مدل ترکیبی ریچاردسون-دوشمن، وابستگی زاویه ضربه، عملکرد انتشار الکترون، دینامیک مولکولی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
چکیده انگلیسی

We present a model to describe the kinetic internal and external electron emission from an ion bombarded metal target. The model is based upon a molecular dynamics treatment of the nuclear degree of freedom, the electronic system is assumed as a quasi-free electron gas characterized by its Fermi energy, electron temperature and a characteristic attenuation length.In a series of previous works we have employed this model, which includes the local kinetic excitation as well as the rapid spread of the generated excitation energy, in order to calculate internal and external electron emission yields within the framework of a Richardson–Dushman-like thermionic emission model. However, this kind of treatment turned out to fail in the realistic prediction of experimentally measured internal electron yields mainly due to the restriction of the treatment of electronic transport to a diffusive manner. Here, we propose a slightly modified approach additionally incorporating the contribution of hot electrons which are generated in the bulk material and undergo ballistic transport towards the emitting interface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 352, 1 June 2015, Pages 18–21
نویسندگان
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