Production and decay of Sulphur excited species in a ECRIS plasma

• Author(s): Martins, Maria Conceição ; Marques, José Pires ; Costa, Ana Maria ; Santos, José Paulo ; Parente, Fernando ; Schlesser, Sophie ; Le Bigot, Eric-Olivier ; Indelicato, Paul
• Date: 2009
• Persistent ID: http://hdl.handle.net/10362/2506
• Origin: Repositório Institucional da UNL
• Subject(s): X-ray spectra; ECRIS; Plasma; Transition probabilities
• Document Type: Article
• Language: English

Description

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.