[1] G.H. Wang , Nucl. Instr. Meth., B33 (1988), 502.
[2] M. Yussouff eds., Current trends in the physics of material, World Sci. Publ. Co. , Singapare , 1987, p.403.
Structures and properties of both isolated and compacted clusters can be studied by SINS, RBS, NMR and Mössbauer effect, etc. Some important properties of these microclusters, such as magic numbers, isotopic effect, gas-like structures are discussed.