Klaus Bartschat (Drake University)
In recent years, much progress has been achieved in calculating reliable cross-section datasets for electron scattering from atoms and ions, in particular quasi-one and quasi-two electron systems such as H, He, the alkalis, and the alkaline-earth metals. Until recently, however, accurate calculations of electron collisions with more complex targets, such as the heavy noble gases Ne-Xe, have remained a significant challenge to theory. In this talk, we will illustrate with a few examples how the B-spline R-matrix (BSR) method with non-orthogonal orbitals [1-3] has been able to dramatically improve the quality of theoretical datasets for oscillator strengths  as well as electron collisions with numerous targets, including the heavy noble gases , and how these data were used successfully in modelling applications . The most recent extension of the method, the B-spline R-matrix with Pseudo-States (BSRMPS) approach, includes a large number of pseudostates in the close-coupling expansion, thereby allowing for the fully non-perturbative treatment of highly correlated processes such as ionization and even ionization with simultaneous excitation .
- O. Zatsarinny and K. Bartschat, J. Phys. B 37 (2004), 2173 and 4693
- O. Zatsarinny, Comp. Phys. Commun. 174 (2006) 273
- O. Zatsarinny and K. Bartschat, Phys. Rev. A 77 (2008) 062701
- O. Zatsarinny and K. Bartschat, Phys. Scr. Rev. T134 (2009) 014020.
- K. Bartschat and O. Zatsarinny, Plasma Sources Sci. Technol. (2011) 024012
- D. Dodt, A. Dinklage, K. Bartschat, and O. Zatsarinny, New Journal of Physics 12 (2010) 073018
- O. Zatsarinny and K. Bartschat, Phys. Rev. Lett. 107 (2011) 023203