Investigations of the kinetic energy spectra of decay of the sputtered silicon cluster ions

The measurements of the kinetic energy spectra of decay were applied to define the activation energy of decay for clusters Sin+ (n = 4-10) sputtered by ions Xe+ according to the classical theory of monomolecular decay RRK and to investigate the monomolecular fragmentation channels. The life times of fragmentating clusters Sin+ as function of excitation energy are determined. The influence of fragmentation on formation of secondary ion mass spectra is shown. (author)