so high, and the separation of the neutrons takes place for a longer time. After 50-60 fm/c (see Fig. \[fig:1\]), the density drops to the sub-saturation density region and now the soft symmetry energy has a quite high magnitude (see Fig. \[fig:3\]) compared to the stiff one. The soft symmetry energy in this region is still separating the neutrons as well as accelerating them high kinetic energy. That is why the ratio with the soft symmetry energy drastically changes when one goes from compression to freeze-out time, but remains almost constant with the stiff symmetry energy.

Mainly, the neutron-to-proton ratio is found to decrease with the incident energy for free nucleons as well as for LCPs, just like the $\pi^-/\pi^+$ ratio. The decrease in the ratio may be due to two reasons:

-   [One reason may be the role of Coulomb interactions with incident energy. With increasing incident energy, chances of break-up of initial correlations among the nucleons becomes stronger, and the production of free nucleons including neutrons and protons will increase . However, at very low incident energy, the production of neutrons is more due to the symmetry energy because of its repulsive (attractive) nature for neutrons (protons). In 