Electron-impact double and triple ionization (TI) is investigated for the Se3+ ion by performing level-to-level calculations. It is demonstrated that ionization-autoionization, excitation double-autoionization, direct double ionization (DDI), and resonant-excitation triple-autoionization contribute to the total double ionization process. The ionization–ionization (II) branch plays the main role in the DDI process. The excitation-II part of DDI with subsequent autoionization dominates in the formation of the Se6+ ions. The contribution to the TI cross sections from the II process is not observed. The correlation effects considered for the 3p shell ionization open the way for the TI.
Synopsis
Analysis of radiative and Auger cascade following creation of the K shell vacancy in the Se atom is presented. Calculations of radiative and Auger transition probabilities are performed by using Dirac-Fock-Slater approximation. Radiative and Auger spectra as well as ion yield produced by cascade are studied.
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