Fully Nonperturbative Treatment of Ionization and Ionization with Excitation of Noble Gases

We have extended the B-spline R-matrix (BSR) method [1] to include a large number of pseudo-states. These pseudo-states are not only important for the accurate treatment of electron-impact excitation processes at intermediate energies, but they also allow for the calculation of ionization processes, using the same basic ideas as in the convergent close-coupling and standard R-matrix with pseudo-states (RMPS) approaches [2,3]. In addition to total cross sections, our general and flexible BSRMPS method yields excellent agreement for the highly correlated ionization with excitation process in helium [4]. Calculations for the more complex Ne and Ar targets will be shown at the conference and compared with recent experimental data [5].\\[4pt] [1] O. Zatsarinny, Comp. Phys. Commun. {\bf 174} (2006) 273.\\[0pt] [2] D. V. Fursa and I. Bray, Phys. Rev. A {\bf 52} (1995) 1279.\\[0pt] [3] K. Bartschat and I. Bray, J. Phys. B {\bf 29} (1996) L577.\\[0pt] [4] O. Zatsarinny and K. Bartschat, Phys. Rev. Lett. {\bf 107} (2011) 023203.\\[0pt] [5] X. Ren {\it et al.}, Phys. Rev. A {\bf 83} (2011) 052714.