The contribution reports about recent experiments on highly oriented pyrolytic graphite (HOPG) by high-resolution Rutherford backscattering spectroscopy (RBS). By using an ion beam of 1 MeV N+ up to seven individual monolayers could be identified in the RBS spectrum from such a sample. This is about twice as much as observed by other groups up to now. Since close to the surface the RBS peaks from the individual carbon layers are well separated, various quantities involved in ion-solid interaction can be determined with high precision, such as the stopping power of 1 MeV N ions in graphite and their energy straggling. Close to the surface the RBS peaks are asymmetric. This asymmetry is well explained in the framework of the Landau theory of energy straggling.
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - Jun 1 2004|
|Event||Proceedings of the Sixteenth International Conference on Ion - Albuquerque, NM., United States|
Duration: Jun 29 2003 → Jul 4 2003
ASJC Scopus subject areas
- Nuclear and High Energy Physics