The R-matrix method - 'application to atoms and ions'

The application of the R-matrix codes developed in Belfast in the early 1970's now covers a wide range of atomic and ionic systems and processes. This paper gives a compilation of currently completed calculations in the fields of electron scattering, photoionization and electric dipole polarizabilities. The major physical points obtained in these calculations are highlighted. Future applications to include intermediate coupling, relativistic effects, electron impact ionization and multiphoton processes are briefly discussed. (Auth.)