L-subshell ionization of lutetium by He-4(2+) ion bombardment

摘要

Inner-shell ionization of materials was studied using particle-induced x-ray emission (PIXE) and Rutherford backscattering spectrometry (RBS). Measurements of the ionization cross-sections of lutetium were performed by impact of He-4(2+) ions in the energy range 1.40-8.50 MeV. The experimental data were compared with the predictions of current theoretical models based on ion-atom collision resulting in inner-shell ionization. The discrepancy between theory and experiment at energies lower than about 5 MeV could be partially understood by incorporating intra-shell coupling that results in vacancy rearrangement among the three L-subshells. Copyright (C) 2002 John Wiley Sons, Ltd. [References: 26]