Continuous phase transition and negative specific heat in finite nuclei

Details Continuous phase transition and negative specific heat in finite nuclei Continuous phase transition and negative specific heat in finite nuclei

2006-01-30

arxiv.org/abs/nucl-th/0601089v1

Phys.Rev. C73 (2006) 034602

Physics

Nuclear Physics

Nuclear Theory

18 pages, 13 figures; Phys. Rev. C (in press)

Scientific paper

10.1103/PhysRevC.73.034602

The liquid-gas phase transition in finite nuclei is studied in a heated liquid-drop model where the nuclear drop is assumed to be in thermodynamic equilibrium with its own evaporated nucleonic vapor conserving the total baryon number and isospin of the system. It is found that in the liquid-vapor coexistence region the pressure is not a constant on an isotherm indicating that the transition is continuous. At constant pressure, the caloric curve shows some anomalies, namely, the systems studied exhibit negative heat capacity in a small temperature domain. The dependence of this specific feature on the mass and isospin of the nucleus, Coulomb interaction and the chosen pressure is studied. The effects of the presence of clusters in the vapor phase on specific heat have also been explored.

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