A Monte Carlo simulation study of channelling and dechannelling enhancement due to lattice translations
- 作者：Rana ; M.A. ; Breese ; M.B.H. ; Osipowicz ; T.
- 关键词：61.85.+p ; 07.78.+s ; 61.72.&minus ; y ; Planar channelling ; Stacking fault ; Lattice translation ; Planar oscillation wavelength
- 刊名：Nuclear Instruments and Methods in Physics Research Section B ; Beam Interactions with Materials and Atoms
- 出版年：2004
- 期刊代码：42_0168583x
- 类别：ph
- 出版时间：July, 2004
- 卷：222
- 期：1-2
- 页码：53-60
- 文件大小：2.82 M
摘要
Monte Carlo simulations have been performed for 2 MeV protons which are planar channelled along the (110) planes of a Si crystal, in which a lattice translation was introduced at different depths to model a stacking fault. Under certain conditions of tilt angle and fault depth, the planar oscillation wavelength of the best channelled beam portion below the fault becomes greater than the wavelength above the fault, and may also be greater than that in a perfect lattice at planar alignment. The conditions under which this behaviour occurs are studied.