He+ impact double ionization of noble gases

Theoretical calculations of He+ impact double ionization of Ne, Ar, Kr and Xe have been performed in the Modified Binary Encounter Approximation. Direct double ionization cross sections have been calculated in the modified binary encounter model. Accurate expression of σ_ΔE (cross section for energy transfer ΔE) and Hatree- Fock velocity distributions for the target electrons have been used throughout the calculations. The present results of double ionization cross sections are in excellent agreement with the experimental observations in the case of Ne, Ar and Kr throughout the energy range. The calculated cross sections differs from the experimental results in the low energy regions in case of Xe because the present approximation not exhibits better result in the low energy regions, while the overestimations of experimental results in the high energy regions shows that more theoretical calculations is required to understand the dynamics of the system.