Effects of dynamical screening on single ionization of potassium by electron impact in doubly symmetric geometry
1 Center for Molecules Research, School of Physics and Information Engineering, Shanxi Normal University Linfen 041004, PRC
Received: 8 December 2013
Accepted: 25 February 2014
The dynamically screened three-Coulomb-wave (DS3C) method is applied to study the single ionization of potassium by electron impact. Triple differential cross-sections (TDCS) are calculated in doubly symmetric geometry at excess energies of 6, 10, 15, 20, 30, 40, 50 and 60 eV. Comparisons are made with recent experimental data and theoretical predictions from a three-Coulomb-wave (3C) and distorted-wave Born approximation (DWBA). The DS3C method is able to reproduce most of the trend of experimental data and in good agreement with DWBA results. It is shown that the DS3C calculation provides much better shape and relative magnitude agreement with experiment.
PACS: 34.80.Dp – Atomic excitation and ionization / 34.50.-s – Scattering of atoms and molecules
© EPLA, 2014