Plasma-Screening Effects on the Electron-Impact Ionization of Atoms / Molecules and Ions Embedded in Weak Plasma

Plasma screening effects on electron induced atomic collision properties have attracted considerable research attention, because of applications in inertial confinement fusion and X-ray lasers etc. The theoretical interest is to examine the ionization of atomic/molecular targets by the impact of electrons in plasma. Basically the electron scattering problem is treated in a semi-empirical approach in the complex scattering potential ionization contribution (CSP-ic), to calculate \textit{total ionization cross section} as a dominant part of total inelastic cross sections. This approach has been successful for number of (free) atomic and molecular targets in [1]. This paper extends the method to the collision processes in plasma and the relative contribution of ionization has been identified. We consider He$^{+}$ ion embedded in weak plasma. The static potential of the e-He$^{+}$ system in plasma environment is derived by us. Results will be discussed in the Conference. \newline \textbf{References:} [1] K N Joshipura, Bhushit G Vaishnav and Sumona Gangopadhyay, Int. J. Mass. Spectrom. \textbf{261} (2007) 146.