Surface tracks by MeV C60 impacts on mica and PMMA |
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| Affiliation: | 1. College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;3. Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing 210044, China;4. SAE Technology Development (Dongguan) Co. Ltd., Guangdong 523087, China;5. Environment Research Institute, Shandong University, Jinan 250100, China;6. College of Earth Sciences, Jilin University, Changchun 130061, China;7. Institute of Environment Science, Shanxi University, Shanxi 030001, China;8. Core Tech Integrated (Beijing) Pty. Ltd., Beijing 100086, China;1. Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden;2. Kazan State Medical University, 420012 Kazan, Russia;3. Institute of Physics, Kazan Federal University, 420008 Kazan, Russia;4. Department of Physics, Warwick University, Coventry CV47AL, UK |
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| Abstract: | Muscovite mica has been bombarded by C60 ions with energies between 2 and 15 MeV. The produced surface tracks have been analyzed by atomic force microscopy (AFM). The particle impacts formed hillocks with a height which increases with energy from 2 to 6 nm. For impacts of I, Ge3, C8, C10, Cu9, and Cu10 MeV ions, hillocks smaller than 0.6 nm have been found. Irradiation with GeV monoatomic particles at similar energy loss performed by other research groups has only changed the frictional properties of the mica surface but did not produce any hillocks. The results can be understood qualitatively by taking into account the large difference in the velocity of the projectiles and the secondary particles along the track.PMMA irradiated with MeV Cn, Gen, and I ions exhibited holes with diameters between 18 and 45 nm after development. The measured track area as a function of energy loss shows an approximately linear behavior, pointing towards a diffusive spreading of energy. |
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