FCT: CFA - Artigos em revista internacional com arbitragem científica
URI permanente para esta coleção:
Navegar
Entradas recentes
- Production and decay of Sulphur excited species in a ECRIS plasmaPublication . Martins, Maria Conceição; Marques, José Pires; Costa, Ana Maria; Santos, José Paulo; Parente, Fernando; Schlesser, Sophie; Le Bigot, Eric-Olivier; Indelicato, PaulThe 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.
- QED and relativistic corrections in superheavy elementsPublication . Indelicato, Paul; Santos, José Paulo; Boucard, Stephan; Desclaux, Jean-PaulIn 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.