https://doi.org/10.1140/epjd/e2002-00111-6
On the fragmentation of multiply charged sodium clusters
1
Bethlehem University, Bethlehem, Palestine
2
Hahn-Meitner-Institut
Berlin, Bereich Theoretische Physik, 14109 Berlin, Germany
and
Freie Universität Berlin, 14109 Berlin, Germany
Corresponding author: a gross@hmi.de
Received:
7
November
2001
Revised:
4
April
2002
Published online:
28
June
2002
The fragmentation of multiply charged atomic sodium clusters of mass 200 is investigated using the Micro-canonical Metropolis Monte Carlo (MMMC) statistical technique for excitation energies up to 200 eV and for cluster charges up to +9e. In this work we present caloric curves and charged and uncharged fragment mass distributions for clusters with charges 0, 2, and 4. The caloric curves show a dip at the critical point implying a negative specific heat, as expected for finite systems, while the fragment mass distributions corroborate the picture of a phase transition from one dominant liquid-like cluster to complete vaporization.
PACS: 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 68.65.-k – Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
