Abstract
The hot Thomas-Fermi formalism, generalized for the case of two interpenetrating pieces of nuclear matter, is applied to investigate thermal properties (the local temperature and entropy) of the nonequilibrium nuclear matter formed during the time evolution of heavy-ion collisions at intermediate energies. Simulations of 20Ne+ 20Ne, 40Ca+ 40Ca and 93Nb+ 93Nb collisions at E lab = 100−400 MeV/u are performed within the framework of the quantum molecular dynamics approach. The sensitivity of thermal properties to the nuclear equation of state as well as their connection with some other dynamic observables are discussed. The anisotropic effects of the nonequilibrium phase space distribution on the thermalization process and the energy- and impact-parameter-dependence of the calculated thermal quantities during the reaction time are studied in detail.
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