Experimental and theoretical study of the angular resolved auger emission L23 of a single crystal target of aluminium excited by ion impact

The measured angular distribution N( phi ) of the L23 Auger electrons of Al excited by Ar+ ion impact on (110) and (111) single crystals have been obtained for several polar angles. Two theoretical models based on a LEED formalism which can be used to calculate these angular distributions were briefly described and compared. There is a fair agreement between the line shape of the experimental and calculated curves. However, the calculated angular distribution have more structures and the calculated anisotropy rates are much larger than the measured ones. 12 ref.--AA