Negative specific heat in a thermodynamic model of multifragmentation

Details Negative specific heat in a thermodynamic model of multifragmentation Negative specific heat in a thermodynamic model of multifragmentation

2003-05-02

arxiv.org/abs/nucl-th/0305006v1

Phys.Rev. C68 (2003) 014607

Physics

Nuclear Physics

Nuclear Theory

Revtex, 13 pages including 6 figures

Scientific paper

10.1103/PhysRevC.68.014607

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.

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