Probing the liquid-t-gas like phase transition in a cluster via a caloric curve

IP

Total partial and electron-capture cross sections for ionization of water vapor by 20-150 keV protons

IP

Reply to the comment on direct experimental evidence for a negative heat capacity in the liquid to gas phase transition in hydrogen cluster ions backbending of the caloric curve

IP

Event by event analysis of collision induced cluster ion fragmentation: sequential monomer evaporation versus fission reactions

IP

Caloric curve for the liquid-to-gas transition of the H25+_{25}^+ hydrogen cluster ion

IPMInternational audienceHigh energy collisions (60 keV/amu) of the H 25 + hydrogen cluster ions with an helium target have been completely analyzed on an event-by-event basis in a recently developed multi-coincidence experiment. By selecting specific decay reactions we can start after the energizing collision with a microcanonical cluster ion ensemble of fixed excitation energy. From the respective fragment distributions for these selected decay reactions we derive corresponding temperatures of the decaying cluster ions. The relation between this temperature and the excitation energy (caloric curve) exhibits the typical prerequisites (plateau region) of a first order phase transition in a finite system, in the present case signaling the transition from a bound cluster to the free gas phase type situation

Ionizing radiation action in water molecules

IPM, présentation faite par B. Farizonpas de résum

Cluster fragmentation and phase transition

IPM, présentation faite par M. Farizonpas de résum

Collision induced cluster fragmentation and phase transition in a finite system

IPM, présentation faite par M. Farizonpas de résum