Master of Science in Physics
Physics and Astronomy
Bernard Zygelman, Committee Co-chair
First Committee Member
Tao Pang, Committee Co-chair
Second Committee Member
Graduate Faculty Representative
Number of Pages
The quantum mechanical treatment of the elastic scattring of atoms from a crystal surface provides valuable information, such as surface properties and gas-surface interaction potentials. However, since it is based on the stationary state solution, it does not provide the details of the scattering process in the neighborhood of the surface, especially when atoms are physically adsorbed. In this thesis, the time evolution of the scattering process is treated in 2D with a model potential, V(x, z) = -|g|δ(z) + λδ(z)cos(2πx/a), using the Gaussian wave packet approach. The focus is on the case where the Gaussian wave packet makes a transition into a selective adsorption state because it can provide information on the probability density of selectively adsorbed particles as well as the details of the scattering process in the neighborhood of the surface. The obtained Gaussian wave packet solution shows a transition into a selective adsorption state. However, the probability density of selectively adsorbed particles cannot be accurately determined because the Gaussian wave packet constructed from the Born approximate time-independent wave function does not conserve the total probability density.
Adsorption; Atom scattering; Gas-surface interaction; Hydrogen storage; Incident waves; Physisorption; Quantum theory; Scattering waves; Surface properties
Physics | Quantum Physics
Sohn, Michael, "Theoretical and computational study of time dependent scattering on a 2D surface" (2010). UNLV Theses, Dissertations, Professional Papers, and Capstones. 16.