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Aggregation Process in the Ion Irradiated Solid Films |
| WANG Jian;CAI Jun;WU Xingfang;LIU Baixin1;FANG Zhengzhi2 |
| Department of Materials Physics, University of Science and Technology in Beijing, Beijing 100083
1Center of Condensed Matter and Radiation Physics, CCAST (World Laboratory), Beijing, and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084
2Beijing Institute of Space Physics, Academia Sinica, Beijing 100080, and Department of Materials Physics, University of Science and Technology in Beijing, Beijing 100083 |
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| Cite this article: |
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WANG Jian, CAI Jun, WU Xingfang et al 1991 Chin. Phys. Lett. 8 408-411 |
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Abstract A fractal aggregation process in the ion irradiated films was recognized. The process was intrinsic of interaction of ions with solids and sincerely modelled by the cluster diffusion-limited-aggregation model. The energetic ions not only drive the atoms and clusters in the area of collision cascade in motion which may be modelled as random walks, but also create vacancies and voids which contribute to the aggregation process. The process was also of percolation characteristic with a fractal dimension 1.82 at the critical point.
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| Keywords:
68.55.Ln
05.40.+j
61.16.Di
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Published: 01 August 1991
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