Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8040230 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2015 | 7 Pages |
Abstract
Backscattering spectra for 4He ions incident on carbon allotropes have been measured in the energy range from 4.30 to 4.95 MeV in steps of 50-100 keV at scattering angles of 106° and 170°. We used three carbon allotropes: graphite, diamond and amorphous carbon. For all these allotropes, we can observe the sharp (4He, 12C) elastic nuclear resonance at the He ion energy of 4.265 MeV in the backscattering spectra. By varying the incident He energy, we have systematically analyzed the profiles of the resonance peaks to study the energy-loss processes: stopping cross-sections and energy-loss straggling around the interesting region of the stopping maximum at about 500 keV. We focus on the resonance profiles and investigate an allotropic effect concerning the energy-loss. Furthermore, an energy bunching effect on the straggling is presented and the mechanism is discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Mitsuo Tosaki, Eero Rauhala,