Plasma-screening effects on semiclassical ionization probabilities for the electron-impact ionization of hydrogenic ions in dense plasmas

Plasma-screening effects are investigated on semiclassical ionization probabilities for electron-impact ionization of hydrogenic ions in dense plasmas. The projectile - target interaction Hamiltonian is obtained by an appropriate form of the non-spherical Debye - Hückel model. Semiclassical straight-line trajectory method is applied to the projectile path in order to visualize the ionization probability in dense plasmas as a function of the impact parameter and Debye length. The final state of the ejected electron is represented by a plane wave solution normalized in the energy scale. The plasma-screening effect on the ionization probability is appreciably increased with increasing projectile energy. The maximum position of the ionization probability recedes from the nucleus as the projectile energy increases.