Theoretical Investigations Of Ground-state Single-ionization Of Na Atom By Electron Impact

The basic theory of single-ionization of the multi-electron atom by electron impact and several theoretical models are introduced in this paper. Based on that target is the multi-electron atom, it have been adopted parametrized optimized effective potential (POEP) that can describe the ground state wave function of Na atom and the interaction between the incident electron and target. Three-body coulomb model (BBK model) of Braune, Briggs, Klar and dynamic screening three coulomb wave approximate model (DS3C model) have been used to calculate the triple differential cross section(TDCS) of single-ionization of Na atom by electron impact in the equal energy-sharing coplanar symmetric geometry, and the incident electron energy are 11.1eV, 15.1eV, 20.1 eV, 25.1eV, 35.1eV, 45.1eV, 55.1eV, 65.1eV respectively. Results are compared with the experimental data of Murray in 2005,the DS3C results of Shi wenqiang and the results have been calculated by Hitawala , Purohit, Sud adopting distorted wave born approximation (DWBA theory). Dynamics screening(DS) between two-body coulomb subsystems in the final state,post-collision interaction(PCI) and selection of model potential are studied to observate the influences on TDCS. It is shown that the results of DS3C that have been adopted parametrized optimized effective potential is in good agreement with experiment. Particularly, it is consistent with the experimental data in the high-energy incident, experimental results are explained qualitatively, it is illustrated that DS3C model is successful and single-ionization of Na atom by electron impact can be described well.