RATIP - a toolbox for studying the properties of open-shell atoms and ions

Recent developments and the current capabilities of the RATIP package are r eviewed. During the last years, this atomic structure code has been proven useful for studying the level structures, transition probabilities, and Aug er properties of atoms and ions with rather different shell structures. RAT IP extents the widely applied GRASP program to calculate a variety of atomi c transition and ionization properties within a relativistic framework. It not only supports large-scale applications but also facilitates the handlin g and interpretation of the generated data. The object-oriented design of R ATIP, which is open to further applications, provides a new route for accur ate ab-initio predictions on open-shell systems. (C) 2001 Elsevier Science B.V. All rights reserved.