| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9817989 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2005 | 5 Pages |
Abstract
We have observed Raman scattering from highly oriented pyrolytic graphite (HOPG) surfaces after irradiation with highly charged ions (HCIs) as ex situ spectroscopy. HCIs having various potential energies from 5Â keV for Ar16+ to 99Â keV for Xe50+ were normally incident onto HOPG surfaces with the same collision velocities (5Â ÃÂ 105Â m/s). In all spectra at fluence of 1Â ÃÂ 1011Â ions/cm2, disorder induced peaks (D peak) appeared around 1580Â cmâ1 in addition to narrower peaks (G peak) which were also observed unirradiated HOPG at 1358Â cmâ1. Relative intensities of the D peak with respect to the G peak increase gradually as increasing potential energies of the HCIs. This shows obviously the effect of potential energy deposition on structural deformation of HOPG.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Masahide Tona, Yukari Baba, Satoshi Takahashi, Kazuo Nagata, Nobuyuki Nakamura, Nobuo Yoshiyasu, Chikashi Yamada, Shunsuke Ohtani,