Détermination par spectroscopie auger,des sections efficaces d'ionisation de la couche L23 du magnésium et de l'aluminium sous impact d'ions He+ |
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Authors: | C Benazeth N Benazeth L Viel |
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Institution: | Laboratoire de Physique des Solides, Université Paul Sabotier, Toulouse, France |
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Abstract: | The L23 Mg and L23 Al Auger spectra excited by helium-ion bombardment have been studied. These spectra essentially show an intensive peak interpreted in terms of L23 MM atomic-like and L23 VV transitions. By integration of this peak, the Auger emission cross sections were determined and their variations as a function of the incident particle energy were studied from a few keV up to 100 keV. These results have been compared to the values of the ionization cross sections calculated in a classical binary encounter approximation (BEA). One observed a good agreement for the aluminium target. For the magnesium, the discrepancy in the low energy range shows that, in those case, the electronic promotion in a molecular orbital model added at the electronic excitation due to the direct Coulomb interaction. |
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