Ab initiomolecular treatment of charge transfer bySi4+ions in helium

multicharged ion on helium have been determined by means ofconfiguration-interaction methods. The total and partial electron capture cross sections have been determinedusing a semiclassical approach in the 2-eV–60-keV laboratory energy range. A sharp resonance has beenexhibited for a 45.455-eV collision energy.@S1050-2947~98!00808-7#PACS number~s!: 34.70.1eI. INTRODUCTION