Negative specific heat in a thermodynamic model of multifragmentation

Abstract

We consider a soluble model of multifragmentation which is similar in spirit to many models which have been used to fit intermediate energy heavy ion collision data. In this model $c_v$ is always positive but for finite nuclei $c_p$ can be negative for some temperatures and pressures. Furthermore, negative values of $c_p$ can be obtained in canonical treatment. One does not need to use the microcanonical ensemble. Negative values for $c_p$ can persist for systems as large as 200 paticles but this depends upon parameters used in the model calculation. As expected, negative specific heats are absent in the thermodynamic limit.

Revtex, 13 pages including 6 figures

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Cited by in corpus (9)

• Nuclear multifragmentation within the framework of different statistical ensembles
• Isoscaling bearing information on the nuclear caloric curve
• Partial energies fluctuations and negative heat capacities
• The Statistical Multifragmentation Model with Skyrme Effective Interactions
• The role of Coulomb interaction in fragmentation
• Nuclear condensation and the equation of state of nuclear matter
• Flow effects on multifragmentation in the canonical model
• Continuous phase transition and negative specific heat in finite nuclei
• Effects of geometric constraints on the nuclear multifragmentation process