Partial energies fluctuations and negative heat capacities

Abstract

We proceed to a critical examination of the method used in nuclear fragmentation to exhibit signals of negative heat capacity. We show that this method leads to unsatisfactory results when applied to a simple and well controlled model. Discrepancies are due to incomplete evaluation of potential energies.

Modified figures 3 and 4

References in corpus (9)

• Global Optimization by Basin-Hopping and the Lowest Energy Structures of Lennard-Jones Clusters Containing up to 110 Atoms
• Negative heat capacity in the critical region of nuclear fragmentation: an experimental evidence of the liquid-gas phase transition
• On the reliability of negative heat capacity measurements
• A "Little Big Bang" Scenario of Multifragmentation
• Non equilibrium effects in fragmentation
• Negative specific heat in a thermodynamic model of multifragmentation
• Caloric Curves in two and three-dimensional Lennard-Jones-like systems including Long-range forces
• Enhancement of kinetic energy fluctuations due to expansion
• The role of Coulomb interaction in fragmentation

Cited by in corpus (9)

• Nuclear multifragmentation and phase transition for hot nuclei
• Liquid-Gas phase transition in nuclei
• Nuclear multifragmentation within the framework of different statistical ensembles
• Fluctuations of fragment observables
• Nuclear multifragmentation time-scale and fluctuations of largest fragment size
• Tracking energy fluctuations from fragment partitions in the Lattice Gas model
• Possible canonical distributions for finite systems with nonadditive energy
• Temperature fluctuations in finite systems: Application to the one-dimensional Ising chain
• Reduction of surface coverage of finite systems due to geometrical steps