Medium-sized double magic metal clusters, Al@Ag(54) (-) and Al@Cu(54) (-), are predicted based on unbiased global search and density functional calculation. Both bimetallic core-shell clusters have icosahedral symmetry, and they are much lower in energies than all other low-lying isomers. In contrast, the icosahedral cluster Al@Au(54) (-) is a high-energy isomer. Both Al@Ag(54) (-) and Al@Cu(54...

Probabilistic methods allow a first analysis, which leads to a hierarchy, in terms of orders of magnitude: one risk deserves to be taken into account, whereas some others may be neglected. Then, according to the needs, one can go further, and ask for a better knowledge of those which have been kept. In this respect, we realized in 2005 a risk analysis for the French "Commissariat à l'Energie At...