Influence of non-thermal shielding on the Ramsauer phenomena for the electron-atom-induced dipole scattering in Lorentzian plasmas

Abstract

The non-thermal shielding effects on the Ramsauer phenomena for the electron-atom-induced dipole scattering are investigated in Lorentzian plasmas. The phase theory and the modified Buckingham-type potential are employed to obtain phase shift and collision cross section as functions of spectral index, scattering length, polarizability, collision energy, and the Debye radius. It is found that the non-thermal effect enhances the collision cross section below the Ramsauer energy and suppresses the collision cross section above the Ramsauer energy. In addition, it is found that the non-thermal effect enhances the Ramsauer energy in Lorentzian plasmas.