 


Monday, September 22, 20081:00 PM  2:30 PMCNLS Conference Room (TA3, Bldg 1690) Seminar Rmatrix calculations of atomic collisions D. C. GriffinDepartment of Physics, Rollins College, Winter Park, FL Rmatrix theory has been applied to atomic collision processes since the pioneering work of P. G. Burke and his colleagues at Queens University of Belfast in the early 1970s. In recent years, the development of efficient parallel Rmatrix programs has made it
possible to apply this method to much more complex targets and to include the target continuum in the closecoupling expansion. We will present a brief overview of Rmatrix theory and the parallel
Rmatrix programs that have been developed as part of a collaborative effort at Rollins College, the University of Strathclyde in Scotland, and Auburn University. We will then consider the application of the Rmatrix with pseudostates (RMPS) method to the calculation of electronimpact ionization and excitation for neutral and low chargestate
ions. In addition, we will present Dirac Rmatrix calculations of electronimpact excitation of low chargestate ions of iron as well as highly ionized species of current interest to research on magnetically confined fusion plasmas. Finally, we will show the results of an RMPS calculation of direct singlephoton double photoionization of neutral magnesium.
