Effect of an electron gas on a neutron-rich nuclear pasta 后印本

摘要: We studied the role that electron gas has on the formation of nuclear structures at subsaturation densities and low temperatures (T < 1 MeV). Using a classical molecular dynamics model we studied isospin symmetric and asymmetric matter at subsaturation densities and low temperatures varying the Coulomb interaction strength. The effect of such variation was quantified on the fragment size multiplicity, the inter-particle distance, the isospin content of the clusters, the nucleon mobility and cluster persistence, and on the nuclear structure shapes. We found that the presence of an electron gas distributes matter more evenly, disrupts the formation of larger objects, reduces the isospin content, and modifies the nucleon average displacement, but does not affect the inter-nucleon distance in clusters. The nuclear structures are also found to change shapes by different degrees depending on their isospin content, temperature and density.