Abstract
The status of the analysis of the INDRA-VAMOS experiement performed at GANIL, using the reactions 40,48 Ca+ 40,48 Ca reactions at 35AMeV, are presented. Isotopic distributions of fragments produced in multifragmentation events provide information on the importance of the surface term contribution in the symmetry energy by comparison to AMD predictions.
Highlights
Equation of state of asymmetric nuclear matterThe understanding of the structure and evolution of astrophysical compact objects, as well as the structure of nuclei far from the valley of stability requires the knowledge of the equation of state of nuclear matter under extreme conditions of temperature, densities ans isospin
The equation of state for asymmetric nuclear matter is usually expressed as a term related to symmetric matter and a term which takes into account
The isotopic distributions of fragments produced in multifragmentation events seem rather promising to investigate properties of low density nuclear matter
Summary
The understanding of the structure and evolution of astrophysical compact objects, as well as the structure of nuclei far from the valley of stability requires the knowledge of the equation of state of nuclear matter under extreme conditions of temperature, densities ans isospin. EPJ Web of Conferences the isospin asymmetry of the system This term is usually refered to as the symmetry energy. The isotopic distributions of fragments produced in multifragmentation events seem rather promising to investigate properties of low density nuclear matter. These reactions are believed to proceed through a low density stage at finite temperature during which fragments are expected to be formed [3]. By means of AMD simulations of 40Ca+40Ca, 48Ca+48Ca, 60Ca+60Ca and 46Fe+46Fe collisions at 35 AMeV, the authors shown that the symmetry energy at finite temperature and subsaturation density extracted from primary fragment isotopic distributions corresponds to the symmetry energy of nuclear matter, i.e. surface effects are negligible in multifragmentation events. The experiement was performed at GANIL where 40,48Ca+40,48Ca reactions at 35AMeV were measured
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