Atomic collisional orientation for the electron-impact excitations: Quantum shielding effect

Abstract

The influence of the quantum shielding on the collisional atomic orientation phenomena is investigated for the electron-impact excitations of the hydrogenic ion. The excitation probabilities are derived as a function of the collision energy, impact parameter, and quantum wave number by using the semiclassical method and effective interaction potential. It is found that the influence of the oscillatory quantum shielding enhances the excitation probabilities. The detailed investigation on the variation of excitation preference due to the influence of the quantum shielding is also given. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798361]