Intense emission of cluster anions from gold targets under impact of keV/u gold clusters
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چکیده
Under impact of 150 keV/atom Aun projectiles (1 ≤ n ≤ 9) on gold targets the emission yield of anionic clusters increases much faster with n than expected from a simple proportionality. Moreover the anion size distribution is much larger for bombardment by clusters. The cluster yield enhancements reflect the size dependence of the cluster stability according to the electronic shell structure. Accordingly, the most intense emission is observed for Au7 : under Au9 impact the Au7 yield per incident atom is enhanced by a factor of ~6.
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تاریخ انتشار 2003