Typical TOF spectra  of some metal ion-doped noble gas clusters of the type M⁺X_n. The most stable clusters are indicated by the total number of atoms N=n+1.
 
 

References:
 

• Ch. Lüder, D. Prekas and M.Velegrakis, “Ion-size effects in the growth sequences of  metal-ion-doped noble gas clusters”, Laser Chemistry, 17, 109 (1997)
• D. Prekas,  Ch. Lüder and M. Velegrakis, ” Structural transitions in metal-ion-doped noble gas clusters: Experiments and molecular dynamics simulations” , J. Chem. Phys. 108, 4450 (1998)