Eur. Phys. J. A 10, 27-39

Effective nucleon-nucleon interactions and nuclear matter equation of state

K.C. Chung¹, C.S. Wang^{1, 2}, A.J. Santiago¹ and J.W. Zhang<sup>2

1</sup>  Departamento de Física Nuclear e Altas Energias, Instituto de Física, Universidade do Estado do Rio de Janeiro, Rio de Janeiro-RJ 20559-900, Brazil
²  Department of Technical Physics, Peking University, Beijing 100871, China

ajsant@uerj.br

(Received: 5 May 2000 Communicated by A. Molinari)

Abstract
Nuclear matter equations of state based on Skyrme, Myers-Swiatecki and Tondeur interactions are written as polynomials of the cubic root of density, with coefficients that are functions of the relative neutron excess . In the extrapolation toward states far away from the standard one, it is shown that the asymmetry dependence of the critical point ( ) depends on the model used. However, when the equations of state are fitted to the same standard state, the value of is almost the same in Skyrme and in Myers-Swiatecki interactions, while is much lower in Tondeur interaction. Furthermore, does not depend sensitively on the choice of the parameter in Skyrme interaction.

PACS
21.65.+f - Nuclear matter.
21.30.Fe - Forces in hadronic systems and effective interactions.

© Società Italiana di Fisica, Springer-Verlag 2001