کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5422115 | 1507907 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Role of HOPG density of empty electronic states above vacuum on electron emission spectra induced by ions and UV photons
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Role of HOPG density of empty electronic states above vacuum on electron emission spectra induced by ions and UV photons Role of HOPG density of empty electronic states above vacuum on electron emission spectra induced by ions and UV photons](/preview/png/5422115.png)
چکیده انگلیسی
We present results of secondary electron emission (SEE) induced by UV photons and low energy He ions interacting with a pristine and ion damaged surface of highly-oriented pyrolytic graphite (HOPG). A critical examination of the changes in the SEE spectra produced by the radiation damage allows us to identify the origin of the different features of the SEE spectra. In this way, we conclude that the low energy peak at ~Â 3Â eV is strongly determined by the structure of the (empty) HOPG density of states above vacuum level. In contrast the high-energy structure at ~Â 14Â eV could not be explained by such an argument but rather by exciton autoionization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 622, April 2014, Pages 83-86
Journal: Surface Science - Volume 622, April 2014, Pages 83-86
نویسندگان
J. Ferrón, R.A. Vidal, N. Bajales, L. Cristina, R.A. Baragiola,