1. Impact Features Induced by Single Fast Ions of Different Charge-State on Muscovite Mica
- Author
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Marcos Rodrigo da Silva, Rafael Gustavo Torres Leal, Pedro Luis Grande, Ricardo Meurer Papaléo, and I. Alencar
- Subjects
Nuclear and High Energy Physics ,Materials science ,Feixes de íons ,mica ,02 engineering and technology ,engineering.material ,01 natural sciences ,Molecular physics ,ion track ,electronic stopping power ,Moscovita ,Ion ,Ion track ,Surface modification ,Impact crater ,Charge state ,Mica ,0103 physical sciences ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,Irradiation ,010306 general physics ,Range (particle radiation) ,charge state ,Muscovite ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microscopia de varredura por força ,scanning force microscopy ,Atomic and Molecular Physics, and Optics ,Single ion impact ,single ion impact ,engineering ,lcsh:QC770-798 ,Electronic stopping power ,0210 nano-technology ,surface modification ,Scanning force microscopy ,Hillock - Abstract
The influence of the charge state q on surface modifications induced by the impact of individual fast, heavy ions on muscovite mica was investigated. Beams of 593 MeV 197Auq+ with well-defined initial charge states over a relatively broad range of values (30 to 51) and at different irradiation geometries were used. At normal incidence, the impact features are rounded protrusions (hillocks) with ≳20 nm in diameter. At grazing angles, besides the hillocks, craters and elongated tails (up to 350 nm-long) extending along the direction of ion penetration are produced. It is shown that the impact features at normal incidence depend strongly on the initial charge state of the projectiles. This dependence is very weak at grazing angles as the ion reaches the equilibrium charge state closer to the surface. At normal ion incidence, the hillock volume scales with q3.3±0.6. This dependence stems largely from the increase in the hillock height, as a weak dependence of the diameter was observed.
- Published
- 2021