Origin of atomic clusters during ion sputtering
Rehn, LE, Birtcher, RC, Donnelly, SE, Baldo, PM and Funk, L 2001, 'Origin of atomic clusters during ion sputtering' , Physical Review Letters, 87 (20) , 207601-1-207601-4.
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Previous studies have shown that the size distributions of small clusters ( n<=40 n = number of atoms/cluster) generated by sputtering obey an inverse power law with an exponent between -8 and -4. Here we report electron microscopy studies of the size distributions of larger clusters ( n>=500) sputtered by high-energy ion impacts. These new measurements also yield an inverse power law, but one with an exponent of -2 and one independent of sputtering yield, indicating that the large clusters are produced when shock waves, generated by subsurface displacement cascades, ablate the surface.
|Themes:||Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
|Schools:||Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
|Journal or Publication Title:||Physical Review Letters|
|Publisher:||American Physical Society|
|Depositing User:||H Kenna|
|Date Deposited:||22 Aug 2007 14:42|
|Last Modified:||20 Aug 2013 15:46|
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