Fragmentation Phase Transition in Atomic Clusters II - Coulomb Explosion of Metal Clusters -

Abstract

We discuss the role and the treatment of polarization effects in many-body systems of charged conducting clusters and apply this to the statistical fragmentation of Na-clusters. We see a first order microcanonical phase transition in the fragmentation of $N{a}_{70}^{Z+}$ for Z=0 to 8. We can distinguish two fragmentation phases, namely evaporation of large particles from a large residue and a complete decay into small fragments only. Charging the cluster shifts the transition to lower excitation energies and forces the transition to disappear for charges higher than Z=8. At very high charges the fragmentation phase transition no longer occurs because the cluster Coulomb-explodes into small fragments even at excitation energy ${\epsilon }^{\ast }=0$.

19 text pages +18 *.eps figures, my e-mail adress: [email protected] submitted to Z. Phys. D

References in corpus (2)

• Fragmentation phase transition in atomic clusters I --- Microcanonical thermodynamics
• Fragmentation Phase Transition in Atomic Clusters II -----Symmetry of Fission of Metal Clusters----

Cited by in corpus (4)

• Fragmentation phase transition in atomic clusters I --- Microcanonical thermodynamics
• Charge-Induced Fragmentation of Sodium Clusters
• Fragmentation Phase Transition in Atomic Clusters II -----Symmetry of Fission of Metal Clusters----
• Study of thermometers for measuring a microcanonical phase transition in nuclear fragmentation