Fragmentation of Si clusters studied by a dynamical Hartree-Fock method at semi-empirical level
C.N.R., IMM, Via Gobetti 101, 40129 Bologna, Italy
Corresponding author: a email@example.com
Published online: 9 April 2004
This study describes fragmentation of silicon clusters of size . Fragmentation is produced by the increase of the kinetic energy Ek of the nuclear system and a time-dependent Hartree-Fock method, with a semi-empirical Hamiltonian is used for the evaluation of the transient ensuing the energy input. A typical channel of fragmentation has been observed which consists on the emission of small (from 1 to 5) groups of atoms. Due to these losses, the fragmentation remnants for reach a size equal to 1/2–1/4 of the original one. These trends are in agreement with the experimental ones. Furthermore the critical energies obtained from fragmentation calculations are discussed in the light of the binding energies evaluated for the stationary state.
PACS: 21.60.-n – Nuclear structure models and methods / 31.15.Ct – Semi-empirical and empirical calculations (differential overlap, Hückel, PPP methods, etc.) / 79.60.Jv – Interfaces; heterostructures; nanostructures
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004