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TRANSLATIONAL KINETIC ENERGY RELEASED IN THE DISSOCIATIVE CASCADE OF CHARGED RARE-GAS CLUSTERS: HINTS FOR FINITE SIZE PHASE TRANSITIONS?

    https://doi.org/10.1142/9781848162389_0020Cited by:0 (Source: Crossref)
    Abstract:

    The evaporative cascade of neutral atoms from clusters is investigated using phase space theory and kinetic Monte Carlo simulations. We focus here on the kinematics of sequential dissociation, by recording the translational kinetic energy distributions of the fragments for thermal excitations at fixed excitation energy or at fixed canonical temperature. The average kinetic energy of the monomers exhibits non-monotonic variations with excess energy, backbendings being found as the consequence of successive cooling processes. These effects are significantly washed out by the thermal broadening of the initial excitation. However, these backbendings do not necessarily reflect the intrinsic caloric curves of the clusters.