کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1686180 | 1010590 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Classical and quantum mechanical rainbow-scattering of fast He atoms from a KCl(0Â 0Â 1) surface
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
Fast He atoms with energies from 200Â eV up to 16Â keV are scattered under grazing polar angles of incidence from a flat and clean KCl(0Â 0Â 1) surface. For scattering along low-index directions (axial surface channeling) we observe pronounced peaks in the angular distributions of scattered projectiles which can be attributed to rainbow scattering. From classical and semiclassical trajectory calculations based on individual Hartree-Fock pair and density functional theory (DFT) potentials, we obtain corresponding rainbow angles for comparison with the experimental data. The calculations were performed taking into account the rumpling of K and Cl in the topmost surface layer. Fair agreement with the experimental data is found for scattering along ã1Â 0Â 0ã for DFT as well as individual pair potentials calculated from Hartree-Fock wave functions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 269, Issue 9, 1 May 2011, Pages 799-803
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 269, Issue 9, 1 May 2011, Pages 799-803
نویسندگان
U. Specht, M. Busch, J. Seifert, H. Winter, K. Gärtner, R. WÅodarczyk, M. Sierka, J. Sauer,