Correlation and isospin dynamics of participant-spectator matter in neutron-rich colliding nuclei at 50 MeV/nucleon

TL;DR

This study investigates how isospin asymmetry and collision geometry influence participant-spectator matter in neutron-rich nuclei collisions at 50 MeV/nucleon, revealing sensitive observables for symmetry energy effects.

Contribution

It introduces the use of nucleon number differences in the overlapping zone as a measure of isospin migration sensitive to symmetry energy.

Findings

Difference in nucleon numbers is sensitive to symmetry energy at semiperipheral geometries.

Neutron yield can serve as an experimental probe for symmetry energy effects.

Participant-spectator matter dynamics are influenced by isospin asymmetry and collision geometry.

Abstract

The sensitivities of isospin asymmetry and collision geometry dependencies of participant (overlapping region)- spectator (quasiprojectile and quasitarget region) matter towards the symmetry energy using the isospin quantum molecular dynamical model are explored. Particularly, the difference of the number of nucleons in the overlapping zone to the quasi-projectile-target matter is found to be quite sensitive to the symmetry energy at semiperipheral geometries compared to the individual yield. It gives us a clue that this quantity can be used as a measure of isospin migration. Further, the yield of neutrons (charge of the second-largest fragment) is provided as a tool for overlapping region (quasi-projectile-target) matter to check the sensitivity of the above-mentioned observable towards the symmetry energy experimentally.