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Isospin and symmetry energy effects on nuclear fragment production in liquid-gas-type phase transition region
(SPRINGER, 2005) Buyukcizmeci, N; Ogul, R; Botvina, AS
We have shown that the isospin of nuclei influences the fragment production during the nuclear liquid-gas phase transition. Calculations for Au-197, Sn-124, La-124 and Kr-78 at various excitation energies were carried out on the basis of the statistical multifragmentation model (SMM). We analyzed the behavior of the critical exponent T with the excitation energy and its dependence on the critical temperature. Relative yields of fragments were classified with respect to the mass number of the fragments in the transition region. In this way, we have shown that nuclear multifragmentation exhibits a "bimodality" behavior. We have also shown that the symmetry energy has a small influence on fragment mass distribution; however, its effect is more pronounced in the isotope distributions of produced fragments.
Nuclear fragmentation and critical temperature for the liquid-gas phase transition region
(ELSEVIER SCIENCE BV, 2005) Ogul, R; Buyukcizmeci, N; Botvina, AS
We have investigated the evolution of fragment mass and charge distributions for Au-197, Sn-124 and La-124 nuclei, in the excitation energy range 2 - 12 MeV/nucleon. It is seen that isospin of a nucleus and critical temperature of nuclear matter is highly effective on the multifragmentation phenomena in the phase transition region of finite nuclei.