Electron Impact Single and Double Ionization of Helium calculated with Generalized Sturmian Functions

The single and double ionization of He induced by the collision of high incident energy electrons still remains a challenging problem for theoreticians. Several ab initio calculations (see [1]) of excitation-ionization disagree which each other and with the experimental data [2]. A similar situation is found for the double ionization of He [3]. In this talk, we will provide cross sections for both processes calculated by using the Generalized Sturmian Functions method [4,5]. Comparisons with experimental data [6] and with other calculations will be presented.\\[4pt] [1] J.M. Ngoko Djiokap et al, Phys. Rev. A 81, 042712 (2010).\\[0pt] [2] C. Dupre et al, J. Phys. B 25, 259 (1992).\\[0pt] [3] L.U. Ancarani, et al, J. Phys.: Conf. Ser. 212, 012025 (2010).\\[0pt] [4] D M Mitnik et al, Comp. Phys. Comm. 182 1145 (2011).\\[0pt] [5] G. Gasaneo et al, Accepted in Adv. Quantum Chem. (2013).\\[0pt] [6] A Lahmam-Bennani et al, J. Phys. B 42 165201 (1999); A. Kheifets et al, J. Phys. B 32, 5047 (1999).