Simulation for Helium Atom Scattering From Stepped Surfaces

-- A computer program has been developed to simulate the helium atom scattering from stepped surface for both up hill and down hill scattering with diffraction kinematics chosen to be both in-and out-of-phase relative to the terraces. Codes from the program perform calculation in 3D geometries with normal incidence spectra of helium atoms having beam energy in the range from 15 meV to 60 meV and the smoothing of the step edge atom. Program codes apply the overall phase associated with each point over the surface for three different ranges of potentials, which are prepared by using the modified sudden approximation method of scattering calculation and realistic helium-surface interaction potential. The computations have been executed in the case of a Cu (001) surface. It is observed that the scattering is sensitive to the details in the helium-step interaction potentials.

• Type: Conference
• Year: 2006
• Where: CSC
• Authors: Alauddin Ahmed, Ahmed Ryadh Hasan, Durdana Islam, Mohammed Anwer
• Keywords: CSC 2006, CSC 2007, Helium Atom Scattering, Helium Atoms, Scattering