DSpace Collection: http://hdl.handle.net/10362/2468 2013-06-19T13:34:11Z 2013-06-19T13:34:11Z Production and decay of Sulphur excited species in a ECRIS plasma Martins, Maria Conceição Marques, José Pires Costa, Ana Maria Santos, José Paulo Parente, Fernando Schlesser, Sophie Le Bigot, Eric-Olivier Indelicato, Paul http://hdl.handle.net/10362/2506 2010-01-25T11:30:39Z 2009-01-01T00:00:00Z Title: Production and decay of Sulphur excited species in a ECRIS plasma Authors: Martins, Maria Conceição; Marques, José Pires; Costa, Ana Maria; Santos, José Paulo; Parente, Fernando; Schlesser, Sophie; Le Bigot, Eric-Olivier; Indelicato, Paul Abstract: The most important processes for the creation of S12+ to S14+ ions excited states from the ground configurations of S9+ to S14+ ions in an electron cyclotron resonance ion source, leading to the emission of K X-ray lines, are studied. Theoretical values for inner-shell excitation and ionization cross sections, including double KL and triple KLL ionization, transition probabilities and energies for the deexcitation processes, are calculated in the framework of the multi-configuration Dirac-Fock method. With reasonable assumptions about the electron energy distribution, a theoretical K$\alpha$ X-ray spectrum is obtained, which is compared to recent experimental data. 2009-01-01T00:00:00Z QED and relativistic corrections in superheavy elements Indelicato, Paul Santos, José Paulo Boucard, Stephan Desclaux, Jean-Paul http://hdl.handle.net/10362/2478 2010-01-22T09:29:23Z 2007-01-01T00:00:00Z Title: QED and relativistic corrections in superheavy elements Authors: Indelicato, Paul; Santos, José Paulo; Boucard, Stephan; Desclaux, Jean-Paul Abstract: In this paper we review the different relativistic and QED contributions to energies, ionic radii, transition probabilities and Landé g-factors in super-heavy elements, with the help of the MultiConfiguration Dirac-Fock method (MCDF). The effects of taking into account the Breit interaction to all orders by including it in the self-consistent field process are demonstrated. State of the art radiative corrections are included in the calculation and discussed. We also study the non-relativistic limit of MCDF calculation and find that the non-relativistic offset can be unexpectedly large. 2007-01-01T00:00:00Z