https://doi.org/10.1140/epjb/e2004-00078-0
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 mazzone@bo.imm.cnr.it
Received:
12
August
2003
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
