Comment on "Negative heat capacities and first order phase transitions in nuclei" by L.G. Moretto et al

Details Comment on "Negative heat capacities and first order phase transitions in nuclei" by L.G. Moretto et al Comment on "Negative heat capacities and first order phase transitions in nuclei" by L.G. Moretto et al

2003-04-17

arxiv.org/abs/nucl-th/0304058v1

Phys.Rev. C69 (2004) 069801

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1103/PhysRevC.69.069801

In a recent paper L.G. Moretto et al [nucl-th/0208024] claim that the negative heat capacities presented in our previously published paper \cite{PRL2000} are "artifacts" coming from the use of periodic boundary conditions in the Lattice-Gas calculations. We stress in this comment that this claim is wrong: in ref. \cite{PRL2000} we did not use periodic boundary conditions and anyhow the boundary conditions are irrelevant for the statistical ensemble used in \cite{PRL2000}. The second claim of [nucl-th/0208024] is that, because of the Coulomb repulsion, systems "with A>60 should present no anomalous negative heat capacities". We show that this conclusion is contradicted by exact Lattice-gas simulations including Coulomb forces which present negative heat capacities even for A>200.

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