Global search optimization using the particle swarm algorithm applied to photoelectron diffraction

Abstract

The photoelectron diffraction (PED) is an element and chemical selective technique, which have been used for surface structure determinations. Due the complexity phenomena of low-energy photoelectron diffraction, obtain the structure by holographic inversion method from the experimental data present difficulties which unfeasible the method. To perform a structure determination It s necessary use the comparative method between the experimental and theoretical data from a hypothetical structure in a try-and-error approach, which could spent high computational time. In this project we have developed a Particle Swarm Optimization (PSO) algorithm for structural determination using the PED technique.