Impact Features Induced by Single Fast Ions of Different Charge-State on Muscovite Mica

The influence of the charge state q on surface modifications induced by impact individual fast, heavy ions muscovite mica was investigated. Beams 593 MeV 197Auq+ with well-defined initial states over a relatively broad range values (30 to 51) and at different irradiation geometries were used. At normal incidence, features are rounded protrusions (hillocks) ≳20 nm in diameter. grazing angles, besides hillocks, craters elongated tails (up 350 nm-long) extending along direction ion penetration produced. It is shown that incidence depend strongly projectiles. This dependence very weak angles as reaches equilibrium closer surface. hillock volume scales q3.3 ± 0.6. stems largely from increase height, diameter observed.